Circuit Protection Selection Guide

Bourns
®
Circuit Protection Selection Guide
Circuit Protection Solutions
The Bourns Mission
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while achieving sound growth with technological
products of innovative design, superior quality
and exceptional value. We commit ourselves to
excellence, to the continuous improvement
of our people, technologies, systems, products
and services, to industry leadership and to
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Table of Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Why Protection is Needed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Bourns® Circuit Protection Products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Select the Appropriate Device for your Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Network Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Generic Circuit Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Central Office (CO) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Customer Premises (CPE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
DSL and Voice Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
ADSL Splitter with Primary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
T1/E1 Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
ESD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
New Technology Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
USB OTG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Power over Ethernet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Product Selection Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Telecom Line Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Customer Premises Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
ESD Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Overvoltage Protection Components
GDT – Gas Discharge Tubes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
TSP – Thyristor Surge Protectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
TVS Diodes – Transient Voltage Suppressor Diodes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
Overcurrent Protection Components
Multifuse® – Polymer PTCS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
LPMs - Line Protection Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58
Telefuse™ – Telecom Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
ESD Protection Components
ESD Protection Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
ChipGuard® – Multilayer Varistors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62
Diode Arrays for ESD protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64
Outside Plant
Outside Plant Products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66
Signaling Protectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68
Other Related Products and Capabilities
Transformers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70
Module Solution Capability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74
DC-DC Converters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76
Which Protection Technology is Right for the Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78
Telecommunications Standards and Recommendation Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92
1
Introduction
Bourns is pleased to present this comprehensive
guide to Telecom Circuit Protection, encompassing
our broad range of technologies and products. This
guide will provide the background information and
selection recommendations needed to ensure that
your next project achieves the level of cost-effective
field reliability demanded by today’s customers.
Bourns commissioned a survey of telecom circuit
protection users worldwide to determine their
priorities and needs. We found that reliability,
technical and design support and exemplary
knowledge of protection technology were by far the
three most cited items. Bourns is committed to
meeting each of the three following requirements.
Knowledge of Protection Technology – Bourns
Reliability – Reliability requires an understanding of
The Bourns Website – Bourns website,
the capabilities and specifications of circuit
protection technology. Bourns has a global
reputation for quality products and our circuit
protection devices have consistently demonstrated
reliability in field applications. Bourns is committed
to the complete support of a circuit protection
solution for the life of a program.
www.bourns.com, is an invaluable resource to
further help you determine your circuit protection
solution. The following information is available:
• Comprehensive data sheets
• A product selection tool
• Reference Design Notes
(http://www.bourns.com/archive.aspx)
• Tutorials in the area of circuit protection
(http://www.bourns.com/archive.aspx)
• More detailed information on regulatory
requirements
Technical and Design Support – Bourns has a global
team of specialized sales and Field Applications
Engineers (FAEs) ready to bring in-depth circuit
protection expertise to your next project. Wherever
you are located in the world you have a regional
applications team available to help you from Asia
and Europe to the Americas. For your next
application why not contact your local sales office
which will put you in contact with your nearest FAE
to help you to make the right choice of circuit
protection solutions for your application.
2
boasts the industry’s widest range of telecom
overvoltage and overcurrent protectors. Our active
involvement in international protection standards
organizations ensures world-class technology and
applications expertise. Bourns continues to develop
an innovative range of integrated circuit protection
products using our knowledge and expertise to
combine multiple technologies into optimized single
devices designed to save both cost and board space.
Whether you need a single product or a complete
protection solution, Bourns telecom circuit
protection team is there to help you. We look
forward to working with you.
Why Protection Is Needed
Communication systems are vulnerable to damage
from lightning or other electrical surges. As systems
become more complex, they also become more
vulnerable. Balancing the cost, standards compliance
and field reliability of protection of such systems is
both a commercial and technical challenge,
compounded by the additional performance
constraints of modern digital networks such as xDSL.
A “surge” is a temporary increase in voltage, current
or both. Lightning and the AC power distribution
system cause surges, but of very different magnitudes
and durations (see Table 1). These events can either
be via direct contact or by field or resistive coupling
from events close to the telephone system, resulting
in a wide variety of threats. For example, the effects
of a power line fault caused by lightning may even be
more threatening to the telephone system than the
original lightning. The dangers of large voltages and
currents are obvious, but time is also important.
Lightning is too fast for bulk heating to be critical,
whereas for the longer term currents of AC power
faults, bulk heating can significantly effect device
survival and safety. Direct contact to the AC (power
cross) causes high currents, while lower currents
result from power induction. Obviously, a single
device protection solution is seldom possible.
Amplitude
Lightning
Duration
Bulk
Heating
kA, kV
µs
Negligible
Power Cross
60 A
<30 mins
Significant
Power
Induction
7A
<30 mins
Crucial
Table 1. Different surge sources result in very different
effects
Field reliability
Quality
of service
Standards
compliance
Signal
integrity
Figure 1. Protecting “ Quality of Service” requires
more than standards compliance
Protection performs several key functions as
outlined in Figure 1. First it must prevent or
minimize damage caused by a surge; then it must
ensure that the system returns to a working
condition with minimal disruption to service. It is
vital that under normal conditions the protection
does not interfere with the signal, creating special
challenges for xDSL and other digital technologies.
The protection must also fail in a safe manner during
overstress.
Development of Standards – Due to the enormous
cost of interrupted service and failed network
equipment, telephony service providers around the
world have adopted various specifications to help
regulate the reliability and performance of the
telecommunications products that they purchase. In
Europe and much of the Far East, the most common
standards are ITU-T K.20, K.21 and K.45. In North
America, most operating companies base their
requirements on GR-1089-CORE, TIA-968-A
(formerly known as FCC Part 68), and UL 60950.
The Telecommunication Standards and
Recommendations Summary discusses these various
standards in more depth. Figure 2 on the next page
summarizes the applicable standards.
3
Intra-Building Wiring
Splitter
NID
NID
MDF
MDF
TwistedPair
POTS
NID
NID
Fiber
Customer Premise
(Subscriber)
Circuit Protection
Powered
IT Safety
US
Region
Powered
IT Safety
4
Outside
Plant
Customer
Premise
Customer Premise
(Subscriber)
Central
Office
Access
UL 60950-1
(2003)
UL 60950-21
(2003)
GR-974-CORE
2002)
GR-1361-CORE
(1998)
TIA-968-A + A1 + A2
(2002-2003-2004 – Part 68)
GR-1089-CORE
(2002)
IEC 60950-1
(2001)
GR-1089-CORE
(2002)
IEC 60950-21
(2002)
ITU-T K.50
(2000)
GR-1089-CORE
(2002)
ITU-T K.51
(2000)
ITU-T K.12
(2000)
Primary
Protection
Equipment
Secondary
Protection
Figure 2
Central Office
(Telecom Center)
Primary
Protection
Equipment
Secondary
Protection
Int’l
Access
ITU-T K.28
(1993)
ITU-T K.21/44
(2003)
ITU-T K.45/44
(2003)
ITU-T K.20/44
(2003)
Bourns® Circuit Protection Products
Overvoltage Products
Bourns family of Gas Discharge Tubes (GDTs) creates a
quasi short circuit across the line when the gas is
ionized quasi by an overvoltage, returning to their
high impedance state after the surge has terminated.
These robust devices have the highest impulse
current capability of any technology combined with
negligible capacitance, making them very attractive
for the protection of high speed digital lines as well
as standard POTS lines.
MSP® and TRIGARD® Gas Discharge Tubes
Bourns family of TISP® Thyristor-based devices initially
clamp the line voltage, and then switch to a lowvoltage “On” state. After the surge, when the current
drops below the “holding current,” the protector
returns to its original high impedance state.
Bourns offers a family of Transient Voltage Suppressor
(TVS) Diodes which operate by rapidly moving from
high impedance to a non-linear resistance
characteristic that clamps surge voltages. TVS diodes
provide a fast-acting and well-controlled clamping
voltage, however they exhibit high capacitance and
low energy capability thereby restricting the
maximum surge current.
TISP® – Telecom Overvoltage Protectors
Overcurrent Products
TVS Diodes for low energy surge and ESD protection
Bourns family of Multifuse® Polymer Positive Temperature
Coefficient (PPTC) Thermistor “resettable fuses” is used in
a wide variety of circuit protection applications.
Under high current fault conditions the device
resistance will increase by many orders of magnitude
and remain in a “tripped” state, providing
continuous circuit protection until the fault is
removed. Once the fault is removed and the power
cycled, the device will return to its normal low
resistance state.
Multifuse® Resettable Fuses
Bourns family of Telefuse™ Telecom Fuses is
constructed from a metal element encapsulated
in a ceramic housing. The fuse element heats up at
the rate of I2R. Once the temperature of the element
exceeds the melting point, it vaporizes and opens the
circuit. The low resistance of fuses is attractive
for xDSL applications.
Telefuse™ Telecom Fuses
5
Bourns family of Line Protection Modules (LPMs) is based
on the most fundamental form of current protection
, the Line Feed Resistor (LFR), normally fabricated as a
thick-film resistor on a ceramic substrate. LPMs have
the ability to withstand high voltage impulses
without breaking down, AC current interruption
occurs when the high temperature developed by the
resistor causes mechanical expansion stresses that
result in the ceramic breaking open. Low current
power induction may not break the LFR open,
creating long-term surface temperatures of more
than 300 °C. To avoid heat damage to the PCB and
adjacent components, maximum surface temperature
can be limited to about 250 °C by incorporating a
series thermal fuse link on the LFR.
Line Protection Modules
This capability is extended to the design and
manufacture of a full range of modules,
incorporating both overcurrent and overvoltage
devices on one ceramic substrate. Further
incorporation of silicon die and discrete components
is also possible to achieve small modules with high
performance and full functionality.
ESD PROTECTION PRODUCTS
Bourns family of ChipGuard® ESD clamp protectors
consists of multilayer varistors (MLV) designed to
protect equipment against electrostatic discharge
(ESD) conditions. The Bourns® ChipGuard® series
has low leakage currents that make the devices
transparent under normal operation. ESD transients
cause the device to clamp the voltage by reducing its
effective resistance and the device will reset to a high
impedance state after the disturbance has passed.
The Bourns® ChipGuard® product family is designed
to protect equipment such as communication ports
to IEC61000-4-2, level 4.
ChipGuard® Multilayer Varistors for ESD protection
Bourns offers a family of Diode Arrays for ESD
protection. Using Thin Film on Silicon wafer
fabrication technology combined with Chip Scale
Packaging, such devices are commonly used in
portable electronics applications where the customer
has specified a particular electrical response
characteristic for a minimum real estate allowance.
Handheld wireless devices, in particular, cell phones
and PDAs often have data and/or audio ports that
Diode Arrays for ESD protection (CSP options)
6
connect the device to other external devices such as
laptop computers and headsets. Bourns offers the
capability to integrate resistors, capacitors, inductors,
diodes and transistors into a single monolithic device
with minimal packaging overhead.
Outside Plant
Bourns Outside Plant product line offers a full line of
protection products based on our own Gas Discharge
Tube (GDT) and patented Multi-Stage Protection
(MSP®) technology. Products include
5-Pin protectors for the central office, building
entrances and a wide range of station protectors for
the customer premises. We also offer a complete line
of fully modular Network Interface Devices (NIDs)
available from one to one hundred lines. Our NIDs
are flexible with a wide variety of customizations
available. Additionally, we round out our offering
with a full line of ADSL and VDSL splitters available
in both binding post and snap-in packages. All of
our products are UL listed and manufactured to RUS
and Telcordia technical requirements.
Bourns® Data and Signal Systems Surge Protectors offer
surge protection to field mounted 4-20 mA
transmitters. They feature a 1669 series protector
with a sealed stainless steel pipe for easy connection
to a field transmitter 1/2 inch NPT port and typically
a rail-mounted 1820 series protector to protect the
DCS equipment at the opposite end of the loop.
Outside Plant – NID Boxes and Data Line Protectors
Station Protectors – Central office / customer
premises protectors
Other Products
Bourns offers a family of Transformers suitable for use
in Telecom, LAN, Ethernet and xDSL applications.
They exhibit high isolation and are ideal for signal
conditioning, impedance matching and noise
filtering applications. Devices are available for all
leading chipsets.
A comparison of technologies used in telecom
applications is described in the section entitled, “Which
Protection Technology is Right for the Equipment,”
including technologies not offered by Bourns, describing
the general advantages and disadvantages of each and
also giving suggestions for appropriate applications.
Custom Telecom Transformers
7
Selecting the Appropriate Device for your Application
The following Network Diagram gives an overview of where the
various technologies are used in today’s communication
electronics industry.
Circuit Protection Solutions
8
9
Several generic examples of the use of protection
components are given over the following pages for
your reference. Our field application engineers are
available to discuss your actual circuit configuration
and requirements.
Central Office (CO)
Multifuse®
Resettable Fuse
LPM
TISP® Thyristor Surge
Protection
SLIC
PROTECTOR
SLIC 1
VBAT1
C1
100 nF
0V
TISP6NTP2A
SLIC 2
4A12P-516-500
or
MF-RX012/250
VBAT2
IG
C2
100 nF
0V
Integrated Line Protection for Multiple SLICs
GDT
Multifuse®
Resettable Fuse
LPM
TISP® Thyristor Surge
Protection
RING/TEST
PROTECTION
TISP® Thyristor Surge
Protection
TEST
RELAY
RING
RELAY
SLIC
RELAY
SLIC
PROTECTOR
SLIC
TIP
Th1
S3a
S1a
Th4
S2a
Th3
Th5
Th2
RING
2026-xx
or
2036-xx
4B06B-524-400
or
4B06B-522-500
or
MF-RX012/250
TISP
3xxxF3
or
7xxxF3
Line Card Protection with Electromechanical Relays
10
S3b
S1b
S2b
TISP
61089B
VBATH
TEST
EQUIPMENT
RING
GENERATOR
C1
220 nF
Central Office (CO) – continued
GDT
Multifuse®
Resettable Fuse
LPM
RING
RELAY
SLIC
RELAY
SLIC
TIP
Th1
SW1
SW3
LCAS
Th2
Th3
Th4
2026-xx
or
2036-xx
4B06B-540-125/219
or
MF-RX012/250
SW4
R2
SW2
CONTROL
LOGIC
RING
Vbat
R1
VRING
VBAT
SW5a
SW5b
RING
GENERATOR
Line Card Protection with Solid-State Line Card Access Switch
11
Customer Premises (CPE)
Multifuse®
MF-RX018/250‡
+t˚
Telefuse™
B1250T †
†
‡
Tx
TIA/EIA-IS-968 / UL 60950
ITU-T K.21 (Basic)
TIP
GDT
TISP®
C
Sig nal
2027-xx
or
2035/37-xx
TISP4360MM
or
TISP4360H3
RING
Basic ADSL Interface
Multifuse®
MF-RX018/250‡
Sol id
Sta te
Relay Isolation B arrier
+t˚
Telefuse™
B1250T †
Pol arity
Bridge
Ho ok
Switch
RING
†
‡
TIA/EIA-IS-968 / UL 60950
ITU-T K.21 (Basic)
Pow er
D1 D2
OC1
D3 D4
TIP
Rx Signal
OC2
Ring
Detector
TISP4350H3 †
or
TISP4290L3 ‡
Tx Sig nal
TISP®
Basic Electronic Hook Switch Protection
Multifuse®
MF-RX018/250‡
+t˚
Telefuse™
B1250T †
Pol arity
Bridge
Ring
Detector
RING
Relay
C1
GDT
TISP®
TISP4350H3 †
2027-xx
or
2035/37-xx
TISP4290L3 ‡
R1
C2
D1 D2
D3 D4
D5
D6
Hook
Switc h
C3
DC
Sin k
TIP
D7
†
‡
TIA/EIA-IS-968 / UL 60950
ITU-T K.21 (Basic)
OC1
Basic Electromechanical Hook Switch Protection
12
Isolation B arrier
R2
T1
Sig nal
DSL and Voice Protection
TIP
20
30
TISP®
TISP61089B
B1250T
Telecom
Fuse
SPLITTER
Ringing SLIC
30
B1250T
Telecom
Fuse
Telefuse™
Fuses
RING
20
DSL
TISP4290H3BJR
TIP
30
50
SPLITTER
Dual Voltage
Ringing SLIC
50
30
TISP®
B1250T
Telecom
Fuse
B1250T
Telecom
Fuse
Telefuse™
Fuses
RING
TISP8200MD
TISP8201MD
DSL
TISP4290H3BJ
TIP
SPLITTER
LCAS
SLIC
(Line Card Access Switch)
thy1
thy2
B1250T
Telecom
Fuse
B1250T
Telecom
Fuse
Telefuse™
Fuses
RING
DSL
(Data Subscriber Line)
13
ADSL Splitter with Primary
TIP
ADSL
TISP®
TISP4360H3
RING
Analog
T1/E1 Application
Telefuse™
B1250
Base
Station
Receiver
T1 = 2.4
E1 = 1
1
VCC
Telefuse™
TX1
TX2
B1250T
RX1
VC
TISP®
5.6
TISP4015H1BJ
RX2
TX1
TISP®
TISP4015H1BJR
5.6
TX2
5.6
RX1
TISP®
TISP4015H1BJR
5.6
14
RX2
ESD Protection
Multifuse®
MF-MSMF110
Power
Data
USB
Port
USB
Controller
Data
GND
ChipGuard®
CG0603MLC-05E
Multifuse®
Firewire Port
MF-SM150/33
Power
GND
Data-a
Controller
Data-a
Data-b
Data-b
GND
ChipGuard®
CG0603MLA-18KE
Communication Port Protection
LAN Driver
CG0603MLC-
ChipGuard®
CG0603MLC-
LAN Receiver
RJ45 socket
CG0603MLC-05E
ChipGuard®
CG0603MLC-05E
10/100 Base Ethernet Protection
15
New Technology Applications
USB On The Go (OTG)
Power over Ethernet (PoE)
After the success of the USB 2.0 standard, the USB
Implementers Forum, Inc. developed an expansion
standard called USB OTG (On The Go). USB OTG
was developed based on the concept of allowing
peripheral devices to communicate directly with
each other without going through a PC host. USB 2.0
traditionally consisted of a host/periphery topology
where a PC was the host and the peripheral could
communicate only through the host device.
However, USB OTG was introduced to supplement
USB 2.0 to allow existing mobile devices to
communicate in a point-to-point manner without
the traditional host (PC).
The IEEE 803.3af Ethernet specification standard
defines the voltage and current requirements of
powered Ethernet equipment delivering up to 48
volts of DC power to PoE-compliant devices over
eight-wire Category 5 and 6 cabling. There are two
types of architecture. One is called mid-span, which
involves running power over unused wire pairs in a
LAN cable. Mid-span products are built into patch
panel-like devices that can add PoE to existing LAN
infrastructures. The other, an increasingly popular
version of 802.3af is called end-span. End-span runs
DC power signals over the same wire pairs used for
data transmission. Industry experts say end-span
devices are becoming popular because they are
usually built into new switches with PoE, which
users often buy for IP telephony or WLAN rollouts.
Under USB OTG any peripheral device that is
designed to act as a limited host (A-Device) must be
able to transmit and receive power. In such
equipment, if the current rating per port of the
A-device is greater than 100 mA, then the voltage
regulation is required to be between 4.75 V and
5.25 V, and the A-device is required to meet the
USB 2.0 specification requirements for power
providers. USB 2.0 makes overcurrent protection a
requirement and a polymer PTC resettable fuse, such
as a Bourns® Multifuse® polymer PTC resettable fuse,
is a solution for providing such overcurrent
protection. The Bourns® Multifuse® MF-MSMF
Series and MF-NSMF Series have been introduced
specifically for overcurrent protection of USB OTG
ports.
16
Typically, designers chose to back up the power
management circuit with a solid state polymer PTC
resettable fuse. The resettable fuse deactivates any
port not protected by the power management circuit
due to a temporary or permanent fault and thereby
prevents further system failures.
The Bourns® device is a compact, symmetrical 2018
footprint design with a very low profile. The design
facilitates incorporation onto the already densely
populated boards of today's network equipment.
Product Selection Tables
It is important to read the Technology Comparison
section of this guide prior to deciding what device is
right for the application. We strongly advise that you
contact your local Bourns Field Applications Engineer
to discuss your exact application and choice of
device(s). The advantages and disadvantages of each
technology is discussed which will further help in the
correct choice of components and/or modules.
Telecom Line Protection
Central Office & Access Equipment
U.S.A.
International
Central Office / Access
GR-1089-CORE
Application/
Function
xDSL
Line Card
Protected
Element
DSLAM
Capacitor
Overvoltage
Protection
Access
ITU-T K.44 & K.45
Overcurrent
Protection
Overvoltage
Protection
Overcurrent
Protection
Overvoltage
Protection
Overcurrent
Protection
2X TISP4xxxL/M3
+ TISP4xxxH3
MF-RX018/250
2X TISP4xxxL/M3
+ TISP4xxxH3
MF-RX018/250
B1250T
2X TISP4xxxH3BJ
+ TISP4xxxJ1BJ
2X TISP4xxxH3BJ
Central Office
ITU-T K.20 & K.44
2X TISP4xxxL/M3
B1250T
2X TISP4xxxL/M3
B1250T
2035-35-SM
TISP3xxxH3SL
Analog
Line Card
Mechanical
Relay
TISP7xxxH3SL
B1250T
2X TISP4xxxH3BJ
+ TISP4xxxJ3BJ
4B06B-524-500
TISP3xxxF3
MF-R012/250
TISP3xxxF3
MF-R012/250
4A12P-516-500
TISP7xxxF3
MF-SM013/250
TISP7xxxF3
MF-SM013/250
2X TISP4xxxH3BJ
MF-R016/600
MF-R012/250
TISP1xxxF3
MF-R012/250
MF-SM013/250
TISP61089
MF-SM013/250
4B07B-530-400
TISP820x
4B07B-530-400
4B04B-524-500
TISP83121
4B04B-524-500
4B06B-514-500
TISP6NTP2x
4B06B-514-500
2035-35-SM
Analog
Line Card
WLL
TISP1xxxF3D
4B04B-524-500
TISP1xxxF3
TISP5xxxH3BJ
B1250T
TISP61089
TISP61089AD
4B04B-524-500
TISP61089
TISP61089BD
MF-R016/600
TISP820x
TISP820xMD
4A12P-516-500
TISP83121
SLIC
TISP83121DR
4B07-530-400
TISP6NTP2x
TISP4xxxL3AJ
TISP4xxxL3AJ
TISP4xxxH3BJ
xDSL
B1250T
Transformer/C
TISP4xxxM3BJ
2035-35-SM
Line Card
TISP4xxxM3BJ
MF-R018/250
MF-R016/600
MF-R018/250
TISP4xxxM3AJ
TISP4xxxM3AJ
2036-40-SM
2036-40-SM
2036-40-SM
TISP4A270BJ
+ TISP4125H3BJ
Analog
Line Card
Solid State
Relay (LCAS)
TISP4219H3BJ
+ TISP4125H3BJ
TISP4A265H3BJ
+ TISP4125H3BJ
B1250T
4B06B-540125/219
MFR016/600
B1250T
MF-R012/250
TISPL758F3
MF-SM013/250
Various LPMs
MF-R012/250
TISPL758F3
MF-SM013/250
Various LPMs
B1250T
Note: Central Office Primary Protection comes in various forms of 5-Pin protection modules,
complying with UL 497, GR 974, GR 1361 and RUS-PE 80.
17
Customer Premises Equipment
U.S.A.
TIA-968-A
UL 60950
Application/
Function
DECT / 900 MHz /
2.4 GHz Phone
International
ITU-T K.21 & K.44
IEC 60950
Protected
Element
Overvoltage
Protection
Overcurrent
Protection
Hook Switch /
Electronic Relay
TISP4350H3LM
TISP4350H3BJ
MF-R016/600
B1250T
Rechargeable Battery
CD214B-TxxxC
MF-VS210*
Overvoltage
Protection
Overcurrent
Protection
MF-SM013/250
4B04B-503-500
TISP4290F3LMx
4B06B-514-500
MF-VS210*
TISP4350T3BJ
Phone
Hook Switch/
Electronic Relay
B1250T
CD214B-Txxx
MF-R015/600
2035-35-SM
Feature Phone
Hook Switch/
Electronic Relay
TISP4350MMBJ
TISP4350MMAJ
MF-R015/600-A
CD214B-Txxx
MF-R015/600
2035-35-SM
TISP4600/4700
LAN Phone
Insulation
CD214Cxxx
B1250T
TISP4600/4700
MF-SM013/250
2035-60-SM
Surge Bar Phone Port
Insulation
2035-60-SM
Hook Switch/
Mechanical Relay
2035-35-SM
FAX
Analog Modem
Digital Modem
Set Top Box
Modem
Hook Switch/
Mechanical Relay
MF-R012/250
MF-R015/600
CD214B-Txxx
TISP4350T3BJ
MF-R016/600
2035-35-SM
MF-R015/600-A
CD214B-TxxxC
B1250T
Transformer/C
2035-35-SM
MF-R015/600
Hook Switch/
Electronic Relay
TISP4350T3BJ
B1250T
2035-35-SM
MF-R015/600
USB Port*
CD214B-Txxx
MF-MSMF110
Transformer/C
CD214C-TxxxC
TISP4290L3AJ
MF-R012/250
2035-40
MF-R015/600
2035-35-SM
MF-MSMF110
TISP4395H3
Set Top Box
DSL Modem
B1250T
TISP4395L3
MF-R015/600
2035-40
MF-RX018/250
2035-35-SM
TISP5xxxH3BJ
Set Top Box
DSL Modem
SLIC
B1250T
CD214C-Txxx
DSL Transformer
TISP1072F3
LPM
MF-R015/600
2035-35-SM
4B06B-514-500
TISP6NTP2xD
Set Top Box
SLIC
MF-R015/600
TISP6NTP2x
MF-R012/250
CD214C-Txxx
MF-SM013/250
Cable Telephony
Data Port
Transformer
TISP4350T3BJ
MF-R015/600
Power Passing Tap*
CD214C-Txxx
MF-R055/90*
*Different Regulatory Standards apply
18
MF-RX018/250
TISP4290L3AJ
MF-R055/90*
Customer Premises Equipment – continued
U.S.A.
TIA-968-A
UL 60950
Application/
Function
Protected
Element
Overvoltage
Protection
2035-35-SM
POS Equipment
Hook Switch /
Mechanical Relay
Electric Motor*
Overcurrent
Protection
Insulation
Surge Bar
Phone Port
Insulation
Overcurrent
Protection
2027-xx
MF-SM100*
MF-R015/600
B1250T
TISP4350H3BJ
MF-SM100*
CD214B-Txxx
2035-60-SM
CD214C-TxxxC
UPS
MF-R015/600
TISP61089BD
B1250T
CD214A-Txxx
MF-R015/600
SLIC
WLL
SLIC
TISP1072F3DR
MF-R016/600
Pairgain
SLIC
TISP820xMD
MF-R015/600
TISP4350H3LM
B1250T
CD214A-TxxxC
MF-SMDF050*
Transformer/C
Home LAN
Overvoltage
Protection
2035-60-SM
Routers –
LAN Linked
PABX
International
ITU-T K.21 & K.44
IEC 60950
Power over
Ethernet port*
MF-R014/250
TISP61089
4B06B-514-500
TISP820x
MF-R015/600
TISP4290F3LMx
MF-SMDF050*
*Different Regulatory Standards apply
Note: Primary Protection of Customer Premises Equipment is provided by our line of 5-Pin Building Entrance Modules and our conventional
Station Protectors, Bourns® MSP®, IPA and Coax C-TV Protectors, complying to UL 497, 497C, GR 974, GR 1361 and RUS-PE 80. Various
Network Interface Devices (NIDs) are available for these Customer Premises protectors.
19
ESD Protection Selection
TSP
(Thyristor Surge
Protector)
No
START
ESD
Protection Request?
(IEC61000-4-2)
Yes
Array
Required?
Yes
See
Diode Arrays
(page 64)
No
Is Surge
Required?
MLE Series
Yes
(8/20 µs)
No
MLC Series
• 5 V plus DC voltages
• ESD data sheet
characterized
• 0.5 pF max.
12 V option
• Ultra-low leakage
current
Other Devices
For Outside Plant Protectors, Signaling System Surge
Protectors, Line Protection Modules, TVS Diodes
and Telecom Transformers, please refer to the
Product Selection Guides in the next section and/or
contact your local representative for more
information.
20
Yes
No
Low Capacitance
Requirement?
Yes
Tolerance Capacitance
Requirement?
Low Capacitance
Requirement?
No
No
MLA Series
• 5.5 V plus DC voltages
• 8/20 µs specified
• 140 pF typical for 18
Yes
• 8/20 µs + ESD
specified
• 18 V max. DC
operation
• Leakage current
characterized
MLD Series
• 12 V DC voltages
• ESD data sheet
characterized
• 5 pF max.
GDT – Gas Discharge Tubes
Selection Guide
Bourns® Gas Discharge Tubes (GDTs) prevent
damage from overvoltages by acting as a “crowbar”,
i.e. a short circuit. When a voltage surge exceeds the
GDT’s defined sparkover voltage level (surge
breakdown voltage), the GDT becomes ionized and
conduction takes place within a fraction of a
microsecond. When the surge passes and the system
voltage returns to normal levels, the GDT returns to
its high-impedance (off) state.
Features
• Unmatched performance and reliability
• Various lead configurations
• Smallest size in the industry
(Mini 2-Pole and MINI TRIGARD™)
• Very high surge handling capability
• Extremely low work function for long service life
• Low capacitance & insertion loss
• Highly symmetrical cross-ionization
• Non-radioactive materials
• Optional Switch-Grade Fail-Short Device
• “Crowbar” function to less than 10 V arc voltage
• Telcordia, RUS, ITU-T, IEC, IEEE and UL
compliant
• Broadband network capable
• Through-hole, SMT and cassette mounting
configurations available
• Surge Protector Test Set (Model 4010-01) available
for GDTs and other technologies
3-Terminal GDTs (Switch-Grade Fail-Short Device option available)
Model
DC
Sparkover
Voltage
Max. Single
Surge Rating
(8/20 µs)
DC
Surge Rating
(8/20 µs)
AC Rating
Capacitance
Min. Surge
Life Rating
(10/1000 µs
waveshape)
2026-07
2026-09
2026-15
2026-20
2026-23
2026-25
2026-30
2026-35
2026-40
2026-42
2026-47
2026-60
75 V
90 V
150 V
200 V
230 V
250 V
300 V
350 V
400 V
420 V
470 V
600 V
40 kA
10 x 20 kA
10 x 20 A rms, 1 s
<2 pF
400 x 1000 A
2036-07
2036-09
2036-15
2036-20
2036-23
2036-25
75 V
90 V
150 V
200 V
230 V
250 V
2036-30
2036-35
2036-40
2036-42
2036-47
2036-60
300 V
350 V
400 V
420 V
470 V
600 V
300 x 200 A
20 kA
10 x 10 kA
10 x 10 A rms, 1 s
<2 pF
or 500 x 200 A
10/700 µs
The rated discharge current for 3-Electrode GDTs is the total current equally divided between each line to ground.
21
3-Terminal GDTs (Switch-Grade Fail-Short Device option available) – continued
Model
DC
Sparkover
Voltage
2026-23-xx-MSP
230 V
Max. Single
Surge Rating
(8/20 µs)
DC
Surge Rating
(8/20 µs)
AC Rating
Capacitance
Min. Surge
Life Rating
(10/1000 µs
waveshape)
40 kA
10 x 20 kA
20 x 10 A rms, 1 s
<20 pF
1000 x 1000 A
t°
2026-33-xx-MSP
330 V
t°
MSP® = Multi-Stage Protection. MSP® devices have has a patented Switch-Grade Fail-Short Device as standard configuration and contains 2 miniature MOVs in parallel with each line.
The rated discharge current for 3-Electrode GDTs is the total current equally divided between each line to ground.
2-Terminal GDTs
22
Model
DC
Sparkover
Voltage
Max. Single
Surge Rating
(8/20 µs)
DC
Surge Rating
(8/20 µs)
AC Rating
Capacitance
Min. Surge
Life Rating
(10/1000 µs
waveshape)
2027-09
2027-15
2027-20
2027-23
2027-25
2027-30
2027-35
2027-40
2027-42
2027-47
2027-60
90 V
150 V
200 V
230 V
250 V
300 V
350 V
400 V
420 V
470 V
600 V
20 kA
10 x 10 kA
10 x 10 A rms, 1 s
<1 pF
400 x 500 A
2037-09
2037-15
2037-20
2037-23
2037-25
2037-30
2037-35
2037-40
2037-42
2037-47
2037-60
90 V
150 V
200 V
230 V
250 V
300 V
350 V
400 V
420 V
470 V
600 V
2035-09
2035-15
2035-20
2035-23
2035-25
90 V
150 V
200 V
230 V
250 V
2035-30
2035-35
2035-40
2035-42
2035-47
2035-60
300 V
350 V
400 V
420 V
470 V
600 V
300 x 100 A
10 kA
10 x 5 kA
10 x 5 A rms, 1 s
<1 pF
or 500 x 100 A
10/700 µs
300 x 100 A
10 kA
10 x 5 kA
10 x 5 A rms, 1 s
<2 pF
or 500 x 100 A
10/700 µs
GDT Product Dimensions
2026-XX-A
2026-XX-C8
1.6
(.063)
2026-XX-C – 1.0 mm (0.040 ˝) dia. lead wire
2026-XX-CB – 0.8 mm (0.032 ˝) dia. lead wire
7.8
(.307)
30
(1.2)
LONG
2 PLCS.
7.5
(.29)
9.0
(.354)
0.6
(.024)
11.7
(.460)
1.0 DIA.
(.04)
1.0 DIA.
(.04)
2026-XX-A1
7.5
(.29)
2026-XX-C13
7.9
(.311)
11.2 REF.
(.440)
7.5
(0.3)
Fail-Short Configuration
2026-XX-C2F Shown
8.1
(.32)
1.0 DIA.
(.04)
5.5
(0.22)
1.0 DIA.
(.04)
0.7 - 1.0
(.028 - .040)
2026-XX-C2
4.4 MIN.
(0.18)
5.5
(0.22)
9.8
(.38)
2026-XX-C14
13.0 MAX.
(.512)
7.5
(.295)
15.5 REF.
(.610)
1.0
(.04)
DIA.
REF.
DIMENSIONS =
MILLIMETERS
(INCHES)
6.6
(.26)
1.0 DIA.
(.04)
6.6
(.26)
4.5 MIN.
(.177)
4.4
(.173)
4.4
(.173)
2026-XX-C18
2026-XX-C3
17.8
(.70)
7.5
(.295)
3.04
(.120)
1.0 DIA.
(.04)
4.5 MIN.
(.177)
4.75
(.187)
4.75
(.187)
1.0 DIA.
(.04)
6.4
(.25)
3.93
(.155)
6.4
(.25)
Specifications are subject to change without notice.
Customers should verify actual device
performance in their specific applications.
23
GDT Product Dimensions
2036-XX-A
2036-XX-B – 0.8 mm (0.032 ˝) dia. lead wire
2036-XX-C – 1.0 mm (0.040 ˝) dia. lead wire*
5.1
DIA.
(.202)
7.4 - 7.7
(.290 - .303)
DIA.
2026-XX-C2M1XX
25.0
LONG MIN.
(0.99)
0.7 - 1.0
(.028 - .040)
4.3
(.17)
25.0
LONG MIN.
(0.99)
4.0
(.157)
0.8
(.032)
2036-XX-B2 – 0.8 mm (0.032 ˝) dia. lead wire
2036-XX-C2 – 1.0 mm (0.040 ˝) dia. lead wire*
15.5
(.61)
7.4
(.29)
Optional
Configuration
4.0
(.157)
4.0
(.157)
2026-23-C2M136
2026-25-C2M136
2026-33-C2M143
2036-XX-B8 – 0.8 mm (0.032 ˝) dia. lead wire
2036-XX-C8 – 1.0 mm (0.040 ˝) dia. lead wire*
4.4
(.173)
4.4
(.173)
14.2
(.558)
4.0
(.157)
2036-XX-B3 – 0.8 mm (0.032 ˝) dia. lead wire
2036-XX-C3 – 1.0 mm (0.040 ˝) dia. lead wire*
4.0
(.157)
3.8
(.150)
2036-XX-B9 – 0.8 mm (0.032 ˝) dia. lead wire
2036-XX-C9 – 1.0 mm (0.040 ˝) dia. lead wire*
3.8
(0.15)
3.8
(0.15)
7.4
(0.29)
0.8
(.032)
3.8
(.150)
2026-XX-C16M1XX
Fail-Short Configuration
2036-XX-B2F Shown
5.3
(.208)
8.9
(.352)
2026-23-C16M136
2026-25-C16M136
2026-33-C16M143
6.2
(.244)
4.0
(.157)
2026-XX-C4M1XX
19.0
(.748)
Center Electrode Lead: C-Configuration
1.0
(.040)
3X
1.02
DIA.
(.040)
6.35
(.250)
9.5
(.374)
6.35
(.250)
*Center Electrode Lead:
See Center Lead C-Configuration detail.
4.0
(.157)
15.5
(.61)
DIMENSIONS =
7.49
(.295)
MILLIMETERS
(INCHES)
2026-23-C4M136
2026-25-C4M136
2026-33-C4M143
Specifications are subject to change without notice.
Customers should verify actual device
performance in their specific applications.
24
GDT Product Dimensions
2027-XX-A
2035-XX-A
6.0
(.236)
4.1
(.161)
5.0 DIA.
(.197)
8.0
DIA.
(.314)
2027-XX-BT1 – 0.8 mm (0.032 ˝) dia. lead wire
2035-XX-B – 0.8 mm (0.032 ˝) dia. lead wire
2035-XX-C – 1.0 mm (0.040 ˝) dia. lead wire
52.4
(2.1)
20
(0.78)
LONG
2 PLCS.
MIN.
10.0
(0.4)
2035-XX-B5 – 0.8 mm (0.032 ˝) dia. lead wire
2035-XX-C5 – 1.0 mm (0.040 ˝) dia. lead wire
2027-XX-B – 0.8 mm (0.032 ˝) dia. lead wire
2027-XX-C – 1.0 mm (0.040 ˝) dia. lead wire
65.0
(2.5)
16.7
REF.
(.658)
14.2
30.0
LONG
(1.2)
2 PLCS.
(.560)
MIN.
3.8
(.15)
2027-XX-B10 – 0.8 mm (0.032 ˝) dia. lead wire
2027-XX-C10 – 1.0 mm (0.040 ˝) dia. lead wire
2.0
(.075)
2 PLCS.
R
7.6
(.30)
12.7
(.500)
DIMENSIONS =
0.8
(.030)
2 PLCS.
MILLIMETERS
(INCHES)
R
1.5
(.060)
8.1
(.318)
2.0
(.078)
Specifications are subject to change without notice.
Customers should verify actual device
performance in their specific applications.
25
GDT Product Dimensions
2037-XX-A
5.0
(.197)
5.0 DIA.
(.197)
2037-XX-B5 – 0.8 mm (0.032 ˝) dia. lead wire
2037-XX-C5 – 1.0 mm (0.040 ˝) dia. lead wire
16.7
REF.
(.658)
14.2
(.560)
MIN.
2037-XX-B – 0.8 mm (0.032 ˝) dia. lead wire
2037-XX-C – 1.0 mm (0.040 ˝) dia. lead wire
3.8
(.15)
20
(0.78)
LONG
2 PLCS.
MIN.
7.6
(.30)
2035-XX-SM
Recommended Pad Layout
4.4
(.173)
3.9
(.155)
5.0
(.195)
5.6
(.220)
4.8
DIA.
(.190)
1.3
(.050)
2036-XX-SM
Recommended Pad Layout
7.2
(.283)
1.6
(.063)
0.9
(.035)
5.0
DIA.
(.195)
5.0
(.195)
5.6
(.220)
4.8
DIA.
(.190)
0.5
(.020)
0.7
(.028)
6.2
DIA.
(.244)
3.3
(.130)
8.2
(.323)
DIMENSIONS =
MILLIMETERS
(INCHES)
Specifications are subject to change without notice.
Customers should verify actual device
performance in their specific applications.
26
Bourns® TISP® Thyristor Surge Protectors
Selection Guide
Bourns® TISP® thyristor surge protector products
prevent damage from overvoltages, as these silicon
based devices initially clamp the line voltage to limit
overvoltages on telephone lines, then switch to a low
voltage “On” state. After the surge, when the current
drops below the “holding current,” the protector
returns to its original high impedance state.
Features
Fixed Voltage
Gated (Programmable) Voltage
Series
Device Symbol
Applications
• Extensive range offering multiple voltage variants
• Surface mount and through-hole packages
• Designed to withstand international lightning.
Series
R
T
K1
TISP6xxx
TISPPBLx
TISP1xxx
• SLIC Line Card
Dual
Unidirectional
G
Applications
K1
A
G1,G2
Dual
Programmable
T
Device Symbol
A
K2
• SLIC Line Card
• Ericsson PBL3xx
SLIC
K2
K1
R
• 3 Wire Ground
Backed Ringer
• Solid State Relay
• Surge Bars
TISP3xxx
TISPL758L
Dual Bidirectional
G
• Dual SLIC Lines
• Cable Modems
• ISDN Power
Feeds
• Smart NT
• Set Top Boxes
G1,G2
TISP6NTP2x
K2
A
Quad
Programmable
A
K3
G3,G4
•
•
•
•
•
•
T
TISP4xxx
Single
Bidirectional
R
Modems
Telephones
Fax Machines
xDSL
Set Top Boxes
Surge Bars
K
K4
A
G2
TISP83121
Dual Gate
Unidirectional
• Positive &
Negative Polarity
Ringing SLICs
G1
TISP5xxx
K
• SLIC Line Card
• ISDN
Single
Unidirectional
TISP8200
Dual
Programmable
Unidirectional for
Negative Polarity
A
T1
K1
T2
G1
• Analog Line Card
• Dual Supply
Ringing SLIC
A
A
G2
K2
TISP70xx
• xDSL
• ISDN
• T1/E1/E3
Triple
Unidirectional
G
A1
TISP8201
Dual
Programmable
Unidirectional for
Positive Polarity
G1
K
K
TISP8200 &
TISP8201 typically
used as a
complementary
pair
G2
A2
Telecom System Primary Overvoltage Protection
Series
2ELx
7ELx
Applications
Single
Bidirectional
• Solid state
replacement for
Gas Discharge
Tubes
TISP9xxx
Integrated
Complementary
Buffered-Gate
Protector for Dual
Polarity Protection
Line
G1
G2
Ground
• CO & Access
Equipment Line
Cards
• Protection of
Dual Polarity
Ringing SLICs
Line
27
TISP1xxxF3 Series – Dual Unidirectional Overvoltage Protectors (I H = -150 mA)
General fixed voltage SLIC protection for Line Cards and VOIP
ITSP Ratings for Lightning Surge Standards
Protection
Voltage
GR-1089-CORE GR-1089-CORE ITU-T K20/21
V(BO)
2/10 µs
10/1000 µs
5/310 µs
(V)
(A)
(A)
(A)
Delivery
Options
Standoff
Voltage
VDRM
(V)
TISP1072F3
DR, P, SL
-58
-72
TISP1082F3
DR, P, SL
-66
-82
Device
R
T
80
35
50
G
TISP1xxxH3 Series – Dual Unidirectional Overvoltage Protectors (I H = -150 mA)
SLIC protection for Line Cards and VOIP
Standoff
Voltage
VDRM
(V)
TISP1070H3
BJR
-58
-70
TISP1080H3
BJR
-65
-80
TISP1095H3
BJR
-75
-95
TISP1120H3
BJR
-95
-120
Device
R
T
ITSP Ratings for Lightning Surge Standards
Protection
Voltage
GR-1089-CORE GR-1089-CORE ITU-T K20/21
V(BO)
2/10 µs
10/1000 µs
5/310 µs
(V)
(A)
(A)
(A)
Delivery
Options
500
G
28
100
150
TISP3xxx Series – Dual Bidirectional Overvoltage Protectors (I H = 150 mA)
Legerity and Intersil Line Card Access Switch (LCAS) protection, L7581/2/3 protection – TISPL758L3
General 3-point protection – TISP3xxxF3
CO Line Card and CPE modem protection where a ground is available – TISP3xxxT3
Standoff
Voltage
VDRM
(V)
TISPL758LF3†
DR
105, 180
TISP3072F3
DR, P, SL
58
72
TISP3082F3
DR, P, SL
66
82
TISP3125F3
DR, P, SL
100
125
TISP3150F3
DR, P, SL
120
150
TISP3180F3
DR, P, SL
145
180
TISP3240F3
DR, P, SL
180
240
TISP3260F3
DR, P, SL
200
260
TISP3290F3
DR, P, SL
220
290
TISP3320F3
DR, P, SL
240
320
TISP3380F3
DR, P, SL
270
380
TISP3600F3
SL
420
600
TISP3700F3
SL
500
700
TISP3070T3
BJR
58
70
TISP3080T3
BJR
65
80
TISP3095T3
BJR
75
95
TISP3115T3
BJR
90
115
TISP3125T3
BJR
100
125
TISP3145T3
BJR
120
145
TISP3165T3
BJR
135
165
TISP3180T3
BJR
145
180
TISP3200T3
BJR
155
200
TISP3219T3
BJR
180
219
TISP3250T3
BJR
190
250
TISP3290T3
BJR
220
290
TISP3350T3
BJR
275
350
TISP3395T3
BJR
320
395
TISP3070H3
SL
58
70
TISP3080H3
SL
65
80
TISP3095H3
SL
75
95
TISP3115H3
SL
90
115
TISP3125H3
SL
100
125
TISP3135H3
SL
110
135
TISP3145H3
SL
120
145
TISP3180H3
SL
145
180
TISP3210H3
SL
160
210
TISP3250H3
SL
190
250
TISP3290H3
SL
220
290
TISP3350H3
SL
275
350
Device
T
R
ITSP Ratings for Lightning Surge Standards
Protection
Voltage
GR-1089-CORE GR-1089-CORE ITU-T K20/21
V(BO)
2/10 µs
10/1000 µs
5/310 µs
(V)
(A)
(A)
(A)
Delivery
Options
130, 220
175
35
50
80
35
50
175
35
50
190
45
70
250
80
120
500
100
200
G
29
TISP4xxxF3 Series – Single Bidirectional Overvoltage Protectors (I H = 150 mA)
General purpose 2-point protection
Delivery
Options
Device
T
R
Standoff
Voltage
VDRM
(V)
ITSP Ratings for Lightning Surge Standards
Protection
Voltage
GR-1089-CORE GR-1089-CORE ITU-T K20/21
V(BO)
2/10 µs
10/1000 µs
5/310 µs
(V)
(A)
(A)
(A)
TISP4072F3 LM, LMR, LMFR
58
72
TISP4082F3 LM, LMR, LMFR
66
82
TISP4125F3 LM, LMR, LMFR
100
125
TISP4150F3 LM, LMR, LMFR
120
150
TISP4180F3 LM, LMR, LMFR
145
180
TISP4240F3 LM, LMR, LMFR
180
240
TISP4260F3 LM, LMR, LMFR
200
260
TISP4290F3 LM, LMR, LMFR
220
290
TISP4320F3 LM, LMR, LMFR
240
320
TISP4380F3 LM, LMR, LMFR
270
380
TISP4600F3 LM, LMR, LMFR
420
600
TISP4700F3 LM, LMR, LMFR
500
700
80
35
50
175
35
50
190
45
70
TISP4xxxL1 Series – Single Bidirectional Overvoltage Protectors (I H = 50 mA)
Dataline protection such as E1/T1 or xDSL with ITU-T compliance
Ideal for use with MF-RX018/250 Multifuse® PPTC device
Delivery
Options
TISP4015L1
AJR, BJR
8
15
TISP4030L1
AJR, BJR
15
30
TISP4040L1
AJR, BJR
25
40
Device
T
R
30
ITSP Ratings for Lightning Surge Standards
Protection
Voltage
GR-1089-CORE GR-1089-CORE ITU-T K20/21
V(BO)
2/10 µs
10/1000 µs
5/310 µs
(V)
(A)
(A)
(A)
Standoff
Voltage
VDRM
(V)
150
30
45
TISP4xxxL3 Series – Single Bidirectional Overvoltage Protectors (I H = 150 mA)
General 2-point protection for European applications
Ideal for use with MF-SM013/250 Multifuse® PPTC device
Delivery
Options
TISP4070L3
AJR
58
70
TISP4080L3
AJR
65
80
TISP4090L3
AJR
70
90
TISP4125L3
AJR
100
125
TISP4145L3
AJR
120
145
TISP4165L3
AJR
135
165
TISP4180L3
AJR
145
180
TISP4220L3
AJR
160
220
TISP4240L3
AJR
180
240
TISP4260L3
AJR
200
260
TISP4290L3
AJR
230
290
TISP4320L3
AJR
240
320
TISP4350L3
AJR
275
350
TISP4360L3
AJR
290
360
TISP4395L3
AJR
320
395
Device
T
R
ITSP Ratings for Lightning Surge Standards
Protection
Voltage
GR-1089-CORE GR-1089-CORE ITU-T K20/21
V(BO)
2/10 µs
10/1000 µs
5/310 µs
(V)
(A)
(A)
(A)
Standoff
Voltage
VDRM
(V)
125
30
50
TISP4xxxL3 Series – Single Bidirectional Overvoltage Protectors (I H = 150 mA)
General 2-point protection for European applications
Ideal for use with MF-SM013/250 Multifuse® PPTC device
Delivery
Options
Standoff
Voltage
VDRM
(V)
Protection
Voltage
V(BO)
(V)
TISP4070L3
BJR
58
70
TISP4350L3
BJR
275
350
Device
ITSP Ratings for Lightning Surge Standards
TIA-968-A
10/160 µs
(A)
TIA-968-A
5/310 µs
(A)
TIA-968-A
10/560 µs
(A)
50
40
30
T
R
TISP4xxxMM Series – Single Bidirectional Overvoltage Protectors (I H = 150 mA)
General 2-point protection for European applications
Ideal for use with MF-SM013/250 Multifuse® PPTC device
Standoff
Voltage
VDRM
(V)
TISP4300MM
AJR, BJR
230
300
TISP4350MM
AJR, BJR
275
350
TISP4360MM
AJR, BJR
290
360
Device
T
R
ITSP Ratings for Lightning Surge Standards
Protection
Voltage
GR-1089-CORE GR-1089-CORE ITU-T K20/21
V(BO)
2/10 µs
10/1000 µs
5/310 µs
(V)
(A)
(A)
(A)
Delivery
Options
250
55
50
31
TISP4xxxM3 Series – Single Bidirectional Overvoltage Protectors (I H = 150 mA)
General 2-point protection
Ideal for use with MF-SM013/250 Multifuse® PPTC device
Delivery
Options
Device
T
R
Standoff
Voltage
VDRM
(V)
ITSP Ratings for Lightning Surge Standards
Protection
Voltage
GR-1089-CORE GR-1089-CORE ITU-T K20/21
V(BO)
2/10 µs
10/1000 µs
5/310 µs
(V)
(A)
(A)
(A)
TISP4070M3 AJR, BJR, LM, LMR, LMFR
58
70
TISP4080M3 AJR, BJR, LM, LMR, LMFR
65
80
TISP4095M3 AJR, BJR, LM, LMR, LMFR
75
95
TISP4115M3 AJR, BJR, LM, LMR, LMFR
90
115
TISP4125M3 AJR, BJR, LM, LMR, LMFR
100
125
TISP4145M3 AJR, BJR, LM, LMR, LMFR
120
145
TISP4165M3 AJR, BJR, LM, LMR, LMFR
135
165
TISP4180M3 AJR, BJR, LM, LMR, LMFR
145
180
TISP4200M3
AJR, BJR
155
200
TISP4219M3
BJR
180
219
TISP4220M3 AJR, BJR, LM, LMR, LMFR
160
220
TISP4240M3 AJR, BJR, LM, LMR, LMFR
180
240
TISP4250M3 AJR, BJR, LM, LMR, LMFR
190
250
TISP4260M3
200
260
TISP4265M3 AJR, BJR, LM, LMR, LMFR
200
265
TISP4290M3 AJR, BJR, LM, LMR, LMFR
220
290
TISP4300M3 AJR, BJR, LM, LMR, LMFR
230
300
TISP4350M3 AJR, BJR, LM, LMR, LMFR
275
350
TISP4360M3 AJR, BJR, LM, LMR, LMFR
290
360
TISP4395M3 AJR, BJR, LM, LMR, LMFR
320
395
TISP4400M3
300
400
LM, LMR, LMFR
BJR, LM, LMR, LMFR
300
50
100
TISP4xxxT3 Series – Single Bidirectional Overvoltage Protectors for Modem Protection (I H = 150 mA)
TIA-968-A protection
Ideal for use with Telefuse™ B1250 or Multifuse® MF-R015/600 PPTC device
Standoff
Voltage
VDRM
(V)
TISP4290T3
BJR
220
290
TISP4350T3
BJR
275
350
TISP4400T3
BJR
335
400
Device
T
R
32
ITSP Ratings for Lightning Surge Standards
Protection
Voltage
GR-1089-CORE GR-1089-CORE ITU-T K20/21
V(BO)
2/10 µs
10/1000 µs
5/310 µs
(V)
(A)
(A)
(A)
Delivery
Options
250
80
120
TISP4xxxH1 Series – Single Bidirectional Overvoltage Protectors (I H = 50 mA)
Dataline protection such as E1/T1 or xDSL with GR-1089-CORE compliance
Delivery
Options
TISP4015H1
BJR
8
15
TISP4030H1
BJR
15
30
TISP4040H1
BJR
25
40
Device
T
R
ITSP Ratings for Lightning Surge Standards
Protection
Voltage
GR-1089-CORE GR-1089-CORE ITU-T K20/21
V(BO)
2/10 µs
10/1000 µs
5/310 µs
(V)
(A)
(A)
(A)
Standoff
Voltage
VDRM
(V)
500
100
150
TISP4xxxH3 Series – Single Bidirectional Overvoltage Protectors (I H = 150 mA)
General telecom protection, either for enhanced ITU-T or Telecordia GR-1089-CORE designs
Ideal for use with Telefuse™ B1250T and Multifuse® MF-R015/600 PPTC device
Standoff
Voltage
VDRM
(V)
TISP4070H3
BJR, LM, LMR, LMFR
58
70
TISP4080H3
BJR, LM, LMR, LMFR
65
80
TISP4095H3
BJR, LM, LMR, LMFR
75
95
TISP4115H3
BJR, LM, LMR, LMFR
90
115
TISP4125H3
BJR, LM, LMR, LMFR
100
125
TISP4145H3
BJR, LM, LMR, LMFR
120
145
TISP4165H3
BJR, LM, LMR, LMFR
135
165
TISP4180H3
BJR, LM, LMR, LMFR
145
180
TISP4200H3
BJR, LM, LMR, LMFR
155
200
TISP4219H3
BJR
180
219
TISP4220H3
BJR
160
220
TISP4240H3
BJR, LM, LMR, LMFR
180
240
TISP4250H3
BJR, LM, LMR, LMFR
190
250
TISP4260H3
LM, LMR, LMFR
200
260
TISP4265H3
BJR
200
265
TISP4290H3
BJR, LM, LMR, LMFR
220
290
TISP4300H3
BJR, LM, LMR, LMFR
230
300
TISP4350H3
BJR, LM, LMR, LMFR
275
350
TISP4360H3
BJR
290
360
TISP4395H3
BJR, LM, LMR, LMFR
320
395
TISP4400H3
BJR, LM, LMR, LMFR
300
400
TISP4500H3
BJR
320
500
Device
T
R
ITSP Ratings for Lightning Surge Standards
Protection
Voltage
GR-1089-CORE GR-1089-CORE ITU-T K20/21
V(BO)
2/10 µs
10/1000 µs
5/310 µs
(V)
(A)
(A)
(A)
Delivery
Options
500
100
200
33
TISP4CxxxH3 Series – Low Capacitance Single Bidirectional Overvoltage Protectors (I H = 150 mA)
General low capacitance telecom protection for xDSL or data applications
Delivery
Options
TISP4C290H3
BJR
220
290
TISP4C350H3
BJR
275
350
TISP4C395H3
BJR
320
395
Device
T
R
ITSP Ratings for Lightning Surge Standards
Protection
Voltage
GR-1089-CORE GR-1089-CORE ITU-T K20/21
V(BO)
2/10 µs
10/1000 µs
5/310 µs
(V)
(A)
(A)
(A)
Standoff
Voltage
VDRM
(V)
500
100
150
TISP4xxxH4 Series – Single Bidirectional Overvoltage Protectors (I H = 225 mA)
Full temperature general overvoltage protection, where holding current must exceed 150 mA
Standoff
Voltage
VDRM
(V)
TISP4165H4
BJR
135
165
TISP4180H4
BJR
145
180
TISP4200H4
BJR
155
200
TISP4265H4
BJR
200
265
TISP4300H4
BJR
230
300
TISP4350H4
BJR
270
350
Device
T
R
ITSP Ratings for Lightning Surge Standards
Protection
Voltage
GR-1089-CORE GR-1089-CORE ITU-T K20/21
V(BO)
2/10 µs
10/1000 µs
5/310 µs
(V)
(A)
(A)
(A)
Delivery
Options
500
100
200
TISP4xxxJ1 Series – Single Bidirectional Overvoltage Protectors (I H = 20 mA)
General high current dry line data protection or bottom element in a “Y” protection solution
Delivery
Options
TISP4070J1
BJR
58
70
TISP4080J1
BJR
65
80
TISP4095J1
BJR
75
95
TISP4115J1
BJR
90
115
TISP4125J1
BJR
100
125
TISP4145J1
BJR
120
145
TISP4165J1
BJR
135
165
TISP4180J1
BJR
145
180
TISP4200J1
BJR
155
200
TISP4219J1
BJR
180
219
TISP4250J1
BJR
190
250
TISP4290J1
BJR
220
290
TISP4350J1
BJR
275
350
TISP4395J1
BJR
320
395
Device
T
R
34
ITSP Ratings for Lightning Surge Standards
Protection
Voltage
GR-1089-CORE GR-1089-CORE ITU-T K20/21
V(BO)
2/10 µs
10/1000 µs
5/310 µs
(V)
(A)
(A)
(A)
Standoff
Voltage
VDRM
(V)
1000
200
350
TISP4xxxJ3 Series – Single Bidirectional Overvoltage Protectors (I H = 150 mA)
High current POTS protection or powered xDSL protection
Delivery
Options
TISP4290J3
BJR
220
290
TISP4350J3
BJR
275
350
TISP4395J3
BJR
320
395
Device
T
R
ITSP Ratings for Lightning Surge Standards
Protection
Voltage
GR-1089-CORE GR-1089-CORE ITU-T K20/21
V(BO)
2/10 µs
10/1000 µs
5/310 µs
(V)
(A)
(A)
(A)
Standoff
Voltage
VDRM
(V)
1000
200
350
TISP5xxxH3 Series – Single Unidirectional Overvoltage Protectors (I H = -150 mA)
General fixed voltage SLIC protection ideal for VOIP applications
Standoff
Voltage
VDRM
(V)
TISP5070H3
BJR
-58
TISP5070H3
BJR
-65
-80
TISP5110H3
BJR
-80
-110
TISP5115H3
BJR
-90
-115
TISP5150H3
BJR
-120
-150
TISP5190H3
BJR
-160
-190
Device
K
A
ITSP Ratings for Lightning Surge Standards
Protection
Voltage
GR-1089-CORE GR-1089-CORE ITU-T K20/21
V(BO)
2/10 µs
10/1000 µs
5/310 µs
(V)
(A)
(A)
(A)
Delivery
Options
-70
500
100
200
TISP7xxxL1 Series – Triple Bidirectional Overvoltage Protectors (I H = 30 mA)
Balanced 3-point protection for ISDN or xDSL data communications applications
Device
T1
Delivery
Options
Standoff
Voltage
VDRM
(V)
Protection
Voltage
V(BO)
(V)
DR
8
15
ITSP Ratings for Lightning Surge Standards
TIA-968-A
10/160 µs
(A)
TIA-968-A
5/310 µs
(A)
TIA-968-A
10/560 µs
(A)
200
30
50
T2
TISP7015L1
TISP7038L1
DR
28
38
G
35
TISP7xxx Series – Triple Bidirectional Overvoltage Protectors (I H = 150 mA)
General balanced 3-point protection – TISP70xxF3
General balanced 3-point protection typically for European ITU-T applications – TISP7xxxF3
General balanced 3-point protection typically for Telecordia GR-1089-CORE applications – TISP7xxxH3
Standoff
Voltage
VDRM
(V)
TISP7072F3
DR, P, SL
58
72
TISP7082F3
DR, P, SL
66
82
TISP7125F3
DR, P, SL
100
125
TISP7150F3
DR, P, SL
120
150
TISP7180F3
DR, P, SL
145
180
TISP7240F3
DR, P, SL
180
240
TISP7260F3
DR, P, SL
200
260
TISP7290F3
DR, P, SL
220
290
TISP7320F3
DR, P, SL
240
320
TISP7350F3
DR, P, SL
275
350
TISP7380F3
DR, P, SL
270
380
TISP7070H3
SL
58
70
TISP7080H3
SL
65
80
TISP7095H3
SL
75
95
TISP7125H3
SL
100
125
TISP7135H3
SL
110
135
TISP7145H3
SL
120
145
TISP7165H3
SL
130
165
TISP7180H3
SL
145
180
TISP7200H3
SL
150
200
TISP7210H3
SL
160
210
TISP7220H3
SL
160
210
TISP7250H3
SL
200
250
TISP7290H3
SL
230
290
TISP7350H3
SL
275
350
TISP7400H3
SL
300
400
Device
T1
T2
G
36
ITSP Ratings for Lightning Surge Standards
Protection
Voltage
GR-1089-CORE GR-1089-CORE ITU-T K20/21
V(BO)
2/10 µs
10/1000 µs
5/310 µs
(V)
(A)
(A)
(A)
Delivery
Options
85
45
70
190
45
70
500
100
200
TISP6xxx Series – Programmable Overvoltage Protectors for SLIC Protection
Ringing SLIC protection for CO and VOIP applications
Alternative to Legerity (Previously Lucent) L7591 protector – TISPL7591
Infineon (previously Ericsson) PBL386 SLIC protection – TISPPBL1, BL2, BL3
Delivery
Options
Device
K1
K1
TISP61089H
DM
Standoff
Voltage
VDRM
(V)
ITSP Ratings for Lightning Surge Standards
Protection
Voltage
GR-1089-CORE GR-1089-CORE ITU-T K20/21
V(BO)
2/10 µs
10/1000 µs
5/310 µs
(V)
(A)
(A)
(A)
Programmable -20 to -170 V
500
TISP61060
DR, P
Programmable -5 to -85 V
50
TISP61089
DR, P
Programmable -20 to -85 V
120
TISP61089A
DR, P
Programmable -20 to -120 V
120
TISP61089B
DR
Programmable -20 to -170 V
120
TISP61511
DR
Programmable 0 to -85 V
170
TISP61512
P
Programmable 0 to -85 V
170
TISP61521
DR
Programmable 0 to -170 V
170
TISPL7591
DR
Programmable 0 to -80 V
80
TISPPBL1
DR, P, SE
Programmable 0 to -90 V
100
TISPPBL2
DR, P
Programmable 0 to -90 V
100
TISPPBL3
DR
Programmable 0 to -170 V
100
100
150
30
40
A
G1,G2
A
K2
K2
TISP6NPT2x Series – Programmable Overvoltage Protectors for Dual SLIC Protection
Dual SLIC VOIP applications, with reduced protection cost per line
Delivery
Options
Device
Standoff
Voltage
VDRM
(V)
ITSP Ratings for Lightning Surge Standards
Protection
Voltage
GR-1089-CORE GR-1089-CORE ITU-T K20/21
V(BO)
2/10 µs
10/1000 µs
5/310 µs
(V)
(A)
(A)
(A)
K1
G1,G2
TISP6NTP2A
DR
Programmable 0 to -90 V
85
20
25
G3,G4
TISP6NTP2C
DR
Programmable 0 to -170 V
90
25
40
K2
A
A
K3
K4
TISP83121 – Dual-Gate Unidirectional Overvoltage Protectors for Dual Supply SLIC Protection
±ve protection for multiple lines on CO Line Cards
Delivery
Options
Device
Standoff
Voltage
VDRM
(V)
Protection
Voltage
V(BO)
(V)
ITSP Ratings for Lightning Surge Standards
GR-1089-CORE
10/1000 µs
(A)
ITU-T K20/21
5/310 µs
(A)
150
250
A
G2
TISP83121
DR
Programmable 0 to ±100 V
G1
K
37
TISP820xM Series – Dual Unidirectional Reverse Blocking Programmable
Overvoltage Protectors for Dual Supply SLIC Protection
Protection for Infineon PEB4265 and Legerity 79R251 SLICs
Delivery
Options
Device
ITSP Ratings for Lightning Surge Standards
Standoff Protection Holding
Voltage
Voltage Current
GR-1089-CORE GR-1089-CORE ITU-T K20/21
VDRM
V(BO)
IH
2/10 µs
10/1000 µs
5/310 µs
(V)
(V)
(mA)
(A)
(A)
(A)
K1
G1
A
A
TISP8200M
DR
Programmable 0 to -90 V
-150
-210
-45
-70
TISP8201M
DR
Programmable 0 to +90 V
20
210
45
70
G2
K2
A1
G1
K
K
G2
A2
TISP9110LDM – Integrated Complementary Buffered-Gate SCRs for Dual Polarity SLIC Overvoltage Protection
Integrated ITU-T or GR-1089-CORE intrabuilding protection for Infineon PEB4265 and Legerity 79R251 SLICs
Delivery
Options
Device
ITSP Ratings for Lightning Surge Standards
Standoff Protection Holding
Voltage
Voltage Current
GR-1089-CORE GR-1089-CORE ITU-T K20/21
VDRM
V(BO)
IH
2/10 µs
10/1000 µs
5/310 µs
(V)
(V)
(mA)
(A)
(A)
(A)
Line
G1
G2
TISP9110L
Ground
DM
Programmable
+110 to -110 V
+20,
-150
100
30
45
Line
‘EL’ Series – Single Bidirectional Primary Overvoltage Protectors for GR-974-CORE Designs
CO Primary Protection – 2EL2, 2EL3, 2EL4
CO Primary Protection for Datalines – 2EL5
High Exposure Station Protector – 2EL6
Protection
Voltage
V(BO)
(V)
2EL2
Button Cell
2EL3
Button Cell
2EL4
Button Cell
2EL5
Button Cell
65 V to 90 V
100
125
7EL2
Button Cell
265 V to 400 V
300
400
Device
T
ITSP Ratings for Lightning Surge Standards
Delivery
Options
GR-1089-CORE
2/10 µs
(A)
ITU-T K20/21
5/310 µs
(A)
265 V to 400 V
100
125
200 V to 265 V
100
125
215 V to 265 V
100
125
R
38
TISP® Product Dimensions
SMAJ – Plastic Surface Mount Diode
Suffix – AJR
4.06 - 4.57
(.160 - .180)
2.29 - 2.92
(.090 - .115)
2
Index
Mark
(if needed)
2.00 - 2.40
(.079 - .095)
0.76 - 1.52
(.030 - .060)
1.27 - 1.63
(.050 - .064)
0.10 - 0.20
(.004 - .008)
1.58 - 2.16
(.062 - .085)
4.83 - 5.59
(.190 - .220)
SMBJ – Plastic Surface Mount Diode
Suffix – BJ, BJR
4.06 - 4.57
(.160 - .180)
3.30 - 3.94
(.130 - .155)
2
Index
Mark
(if needed)
2.00 - 2.40
(.079 - .094)
0.76 - 1.52
(.030 - .060)
1.90 - 2.10
(.075 - .083)
0.10 - 0.20
(.004 - .008)
1.96 - 2.32
(.077 - .091)
5.21 - 5.59
(.205 - .220)
DIMENSIONS =
MILLIMETERS
(INCHES)
39
SMB03 (Modified DO-214AA Package)
4.06 - 4.57
(.160 - .180)
3
3.30 - 3.94
(.130 - .155)
2
1
2.00 - 2.40
(.079 - .094)
1.90 - 2.10
(.075 - .083)
0.76 - 1.52
(.030 - .060)
0.56
(.022
0.79
(.031
0.10 - 0.20
(.004 - .008)
1.42 - 1.57
(.056 - .062)
5.21 - 5.59
(.205 - .220)
SOIC – Plastic Small Outline
Suffix – D, DR
4.80 - 5.00
(0.189 - 0.197)
5.80 - 6.20
(0.228 - 0.244)
8
7
6
5
1
2
3
4
INDEX
3.81 - 4.00
(0.150 - 0.157)
1.35 - 1.75
(0.053 - 0.069)
0.25 - 0.50 x 45 N0M
(0.010 - 0.020)
7 NOM
3 Places
0.102 - 0.203
(0.004 - 0.008)
0.28 - 0.79
(0.011 - 0.031)
0.36 - 0.51
(0.014 - 0.020)
8 Places
Pin Spacing
1.27
(0.050)
(see Note A)
6 places
DIMENSIONS =
40
4.60 - 5.21
(0.181 - 0.205)
4 4
7 NOM
4 Places
0.190 - 0.229
(0.0075 - 0.0090)
MILLIMETERS
(INCHES)
0.51 - 1.12
(0.020 - 0.044)
- 0.71
- .028)
- 0.94
- .037)
SOIC – 8-pin Plastic Small Outline (210 mil)
Suffix – DM
8
7
6
5
1
2
3
4
7.40 - 8.20
(0.291 - 0.323)
5.00 - 5.60
(0.197 - 0.220)
5.00 - 5.60
(0.197 - 0.220)
2.20 MAX.
(0.087)
0.10
MIN.
(0.004)
1.27 TYP.
(0.050)
0.35 - 0.51
(0.014 - 0.200)
DO92 – Cylindrical Plastic
Suffix – LM, LMR, LMFR
4.44 - 5.21
(.175 - .205)
4.44 - 5.21
(.175 - .205)
MIN.
3.17 - 4.19
(.125 - .165)
3.43
(.135)
MIN.
2.03 - 2.67
(.080 - .105)
2.03 - 2.67
(.080 - .105)
3.17 - 4.19
(.125 - .165)
3.43
(.135)
2.03 - 2.67
(.080 - .105)
2.03 - 2.67
(.080 - .105)
4.32 - 5.34
(.170 - .210)
4.32 - 5.34
(.170 - .210)
MAX.
2.20
(.086)
MAX.
A
2
MIN.
2.20
(.086)
MAX.
4.00
(.157)
A
2
2
12.7
(0.5)
2
0.40 - 0.56
(.016 - .022)
0.40 - 0.56
(.016 - .022)
1
3
3
1
1
3
3
1.14 - 1.40
(.045 - .055)
1
VIEW A
VIEW A
2.40 - 2.90
(.094 - .114)
0.35 - 0.41
(.014 - .016)
0.35 - 0.41
(.014 - .016)
2.40 - 2.90
(.094 - .114)
2.41 - 2.67
(.095 - .105)
DIMENSIONS =
MILLIMETERS
(INCHES)
41
SIP – Plastic Single-in-Line
Suffix – SL
3.20 - 3.40
(0.126 - 0.134)
9.25 - 9.75
(0.364 - 0.384)
Index
Notch
6.10 - 6.60
(0.240 - 0.260)
8.31
(0.327)
MAX.
12.9
(0.492)
MAX.
4.267
(0.168)
MIN.
2
1
3
2.54
Typical
(0.100)
(See Note A)
2 Places
1.854
(0.073)
MAX.
0.203 - 0.356
(0.008- 0.014)
0.559 - 0.711
(0.022 - 0.028)
3 Places
PDIP – Plastic Dual-in-Line
Suffix – P
9.25 - 9.75
(0.364 - 0.384)
8
7
6
5
Index
Notch
6.10 - 6.60
(0.240 - 0.260)
1
2
3
4
1.78
MAX.
(0.070)
4 Places
7.62 - 8.23
(0.300 - 0.324)
5.08
MAX.
(0.200)
Seating
Plane
3.17
MIN.
(0.125)
0.51
MIN.
(0.020)
0.38 - 0.53
(0.015 - 0.021)
8 Places
2.54
Typical
(0.100)
(see Note A)
6 Places
DIMENSIONS =
42
MILLIMETERS
(INCHES)
0.20 - 0.36
(0.008 - 0.014)
8.38 - 9.40
(0.330 - 0.370)
9ELX – Primary Protector Series
0.508
MAX.
(0.020)
To p Electrode
Sleeve
2.11 - 2.31
(0.083 - 0.091)
Bidirectional
Silicon Chip
0.178
MAX.
(0.007)
2x
Bottom Electrode
1.27 - 1.65
DIA.
(0.050 - 0.065)
3.76 - 4.27
DIA.
(0.148 - 0.168)
7EL2 – Primary Protector
0.508
MAX.
(0.020)
To p Electrode
Sleeve
2.16 - 2.45
(0.085 - 0.096)
Bidirectional
Silicon Chip
0.178
MAX.
(0.007)
Bottom Electrode
2.16 - 2.67
DIA.
(0.085 - 0.105)
6.10
DIA.
(0.240)
DIMENSIONS =
MILLIMETERS
(INCHES)
43
Button Cell
0.508
MAX.
(0.020)
To p Electrode
Sleeve
2.11 - 2.31
(0.083 - 0.091)
Bidirectional
Silicon Chip
0.178
MAX.
(0.007)
2x
1.27 - 1.65
DIA.
(0.050 - 0.065)
3.76 - 4.27
DIA.
(0.148 - 0.168)
DIMENSIONS =
44
MILLIMETERS
(INCHES)
Bottom Electrode
TVS Diodes
Selection Guide
Bourns offers Transient Voltage Suppressor diodes for
low energy surge and ESD protection applications
that meet the following standards: IEC 61000-4-2,
IEC 61000-4-4 and IEC 61000-4-5
Features
• Compact package options: DO-214AC (SMA),
DO-214AA (SMB) and DO-214AB (SMC)
• Working Peak Reverse Voltages
from 5 V up to 170 V
• Breakdown Voltages up to 200 V
• Typical fast response times are less than 1.0 ns
(Unidirectional), 5.0 ns (Bidirectional)
• Conforms to JEDEC standards
• Easy to handle on standard pick and place
equipment
• Flat configuration minimizes roll away
• RoHS compliance optional
Minimum Peak Pulse
Power Dissipation
(TP = 1 ms)
PPK
Working Peak
Reverse Voltages
VRWM
Peak Forward Surge Current
8.3 ms Single Half Sine Wave
Superimposed on Rated Load
(JEDEC Method)
Package
Reference*
CD214A-TX.XX
400 W
5 to 170 V
40 A
SMA
CD214B-TX.XX
600 W
5 to 170 V
100 A
SMB
CD214C-TX.XX
1500 W
5 to 170 V
200 A
SMC
*See data sheet for mechanical specification.
45
CD214A Series (SMA Package)
Electrical Characteristics (@ TA = 25 °C unless otherwise noted)
Part Number
(Unidirectional
Device)
Part
Mrkg
Part Number
(Bidirectional
Device)
Part
Mrkg
Breakdown Voltage
VBR Volts
Min.
46
Max. @IT (mA)
Working Peak Max. Reverse
Reverse
Leakage
Voltage
at VRWM
VRWM (Volts)
IR (uA)
Max. Reverse
Max. Reverse
Voltage
Surge Current
at IRSM
VRSM (Volts)
Pkg
IRSM (Amps)
CD214A-T5.0A
HE
CD214A-T5.0CA
TE
6.40
7.00
10
5.0
800 / 1600
9.2
43.5
SMA
CD214A-T6.0A
HG
CD214A-T6.0CA
TG
6.67
7.37
10
6.0
800 / 1600
10.3
38.8
SMA
CD214A-T6.5A
HK
CD214A-T6.5CA
TK
7.22
7.98
10
6.5
500 / 1000
11.2
35.7
SMA
CD214A-T7.0A
HM
CD214A-T7.0CA
TM
7.78
8.60
10
7.0
200 / 400
12.0
33.3
SMA
CD214A-T7.5A
HP
CD214A-T7.5CA
TP
8.33
9.21
1.0
7.5
100 / 200
12.9
31.0
SMA
CD214A-T8.0A
HR
CD214A-T8.0CA
TR
8.89
9.83
1.0
8.0
50 / 100
13.6
29.4
SMA
CD214A-T8.5A
HT
CD214A-T8.5CA
TT
9.44
10.4
1.0
8.5
10 / 20
14.4
27.7
SMA
CD214A-T9.0A
HV
CD214A-T9.0CA
TV
10.0
11.1
1.0
9.0
5 / 10
15.4
26.0
SMA
CD214A-T10A
HX
CD214A-T10CA
TX
11.1
12.3
1.0
10
5 / 10
17.0
23.5
SMA
CD214A-T11A
HZ
CD214A-T11CA
TZ
12.2
13.2
1.0
11
5.0
18.2
22.0
SMA
CD214A-T12A
IE
CD214A-T12CA
UE
13.3
14.7
1.0
12
5.0
19.9
20.1
SMA
CD214A-T13A
IG
CD214A-T13CA
UG
14.4
15.9
1.0
13
5.0
21.5
18.6
SMA
CD214A-T14A
IK
CD214A-T14CA
UK
15.6
17.2
1.0
14
5.0
23.2
17.2
SMA
CD214A-T15A
IM
CD214A-T15CA
UM
16.7
18.5
1.0
15
5.0
24.4
16.4
SMA
CD214A-T16A
IP
CD214A-T16CA
UP
17.8
19.7
1.0
16
5.0
26.0
15.3
SMA
CD214A-T17A
IR
CD214A-T17CA
UR
18.9
20.9
1.0
17
5.0
27.6
14.5
SMA
CD214A-T18A
IT
CD214A-T18CA
UT
20.0
22.1
1.0
18
5.0
29.2
13.7
SMA
CD214A-T20A
IV
CD214A-T20CA
UV
22.2
24.5
1.0
20
5.0
32.4
12.3
SMA
CD214A-T22A
IX
CD214A-T22CA
UX
24.4
26.9
1.0
22
5.0
35.5
11.2
SMA
CD214A-T24A
IZ
CD214A-T24CA
UZ
26.7
29.5
1.0
24
5.0
38.9
10.3
SMA
CD214A-T26A
JE
CD214A-T26CA
VE
28.9
31.9
1.0
26
5.0
42.1
9.5
SMA
CD214A-T28A
JG
CD214A-T28CA
VG
31.1
34.4
1.0
28
5.0
45.4
8.8
SMA
CD214A-T30A
JK
CD214A-T30CA
VK
33.3
36.8
1.0
30
5.0
48.4
8.3
SMA
CD214A-T33A
JM
CD214A-T33CA
VM
36.7
40.6
1.0
33
5.0
53.3
7.5
SMA
CD214A-T36A
JP
CD214A-T36CA
VP
40
44.2
1.0
36
5.0
58.1
6.9
SMA
CD214A-T40A
JR
CD214A-T40CA
VR
44.4
49.1
1.0
40
5.0
64.5
6.2
SMA
CD214A-T43A
JT
CD214A-T43CA
VT
47.8
52.8
1.0
43
5.0
69.4
5.7
SMA
CD214A-T45A
JV
CD214A-T45CA
VV
50
55.3
1.0
45
5.0
72.7
5.5
SMA
CD214A-T48A
JX
CD214A-T48CA
VX
53.3
58.9
1.0
48
5.0
77.4
5.2
SMA
CD214A-T51A
JZ
CD214A-T51CA
VZ
56.7
62.7
1.0
51
5.0
82.4
4.9
SMA
CD214A-T54A
RE
CD214A-T54CA
WE
60
66.3
1.0
54
5.0
87.1
4.6
SMA
CD214A-T58A
RG
CD214A-T58CA
WG
64.4
71.2
1.0
58
5.0
93.6
4.3
SMA
CD214A-T60A
RK
CD214A-T60CA
WK
66.7
73.7
1.0
60
5.0
96.8
4.1
SMA
CD214A-T64A
RM
CD214A-T64CA
WM
71.1
78.6
1.0
64
5.0
103
3.9
SMA
CD214A-T70A
RP
CD214A-T70CA
WP
77.8
86.0
1.0
70
5.0
113
3.5
SMA
CD214A-T75A
RR
CD214A-T75CA
WR
83.3
92.1
1.0
75
5.0
121
3.3
SMA
CD214A-T78A
RT
CD214A-T78CA
WT
86.7
95.8
1.0
78
5.0
126
3.2
SMA
CD214A-T85A
RV
CD214A-T85CA
WV
94.4
104
1.0
85
5.0
137
2.9
SMA
CD214A-T90A
RX
CD214A-T90CA
WX
100
111
1.0
90
5.0
146
2.7
SMA
CD214A-T100A
RZ
CD214A-T100CA
WZ
111
123
1.0
100
5.0
162
2.5
SMA
CD214A-T110A
SE
CD214A-T110CA
XE
122
135
1.0
110
5.0
177
2.3
SMA
CD214A-T120A
SG
CD214A-T120CA
XG
133
147
1.0
120
5.0
193
2.0
SMA
CD214A-T130A
SK
CD214A-T130CA
XK
144
159
1.0
130
5.0
209
1.9
SMA
CD214A-T150A
SM
CD214A-T150CA
XM
167
185
1.0
150
5.0
243
1.6
SMA
CD214A-T160A
SP
CD214A-T160CA
XP
178
197
1.0
160
5.0
259
1.5
SMA
CD214A-T170A
SR
CD214A-T170CA
XR
189
209
1.0
170
5.0
275
1.4
SMA
Notes:
1. Suffix “A” denotes 5 % tolerance device.
2. Suffix “C” denotes Bidirectional device.
3. Suffix “CA” denotes 5 % tolerance Bidirectional device.
4. 10 % tolerance devices are available but not shown above.
5. For Bidirectional devices having VR = 10 Volts or under, the IR limit is double.
6. For Unidirectional devices having VF Max = 3.5 V at IF = 35 A, 0.5 Sine Wave of 8.3 ms pulse width.
7. For RoHS compliant devices, add suffix "LF" to part number.
CD214B Series (SMB Package)
Electrical Characteristics (@ TA = 25 °C unless otherwise noted)
Part Number
(Unidirectional
Device)
Part
Mrkg
Part Number
(Bidirectional
Device)
Part
Mrkg
Breakdown Voltage
VBR Volts
Min.
Max. @IT (mA)
Working Peak Max. Reverse
Reverse
Leakage
Voltage
at VRWM
VRWM (Volts)
IR (uA)
Max. Reverse
Max. Reverse
Voltage
Surge Current
at IRSM
VRSM (Volts)
IRSM (Amps)
Pkg
CD214B-T5.0A
HKE
CD214B-T5.0CA
AE
6.40
7.25
10
5.0
800
9.2
65.2
CD214B-T6.0A
KG
CD214B-T6.0CA
AG
6.67
7.67
10
6.0
800
10.3
58.3
SMB
SMB
CD214B-T6.5A
KK
CD214B-T6.5CA
AK
7.22
8.30
10
6.5
500
11.2
53.6
SMB
CD214B-T7.0A
KM
CD214B-T7.0CA
AM
7.78
8.95
10
7.0
200
12.0
50.0
SMB
CD214B-T7.5A
KP
CD214B-T7.5CA
AP
8.33
9.58
1.0
7.5
100
12.9
46.5
SMB
CD214B-T8.0A
KR
CD214B-T8.0CA
AR
8.89
10.2
1.0
8.0
50
13.6
44.1
SMB
CD214B-T8.5A
KT
CD214B-T8.5CA
AT
9.44
10.8
1.0
8.5
20
14.4
41.7
SMB
CD214B-T9.0A
KV
CD214B-T9.0CA
AV
10.0
11.5
1.0
9.0
10
15.4
39.0
SMB
CD214B-T10A
KX
CD214B-T10CA
AX
11.1
12.8
1.0
10
5.0
17.0
35.3
SMB
CD214B-T11A
KZ
CD214B-T11CA
AZ
12.2
14.4
1.0
11
5.0
18.2
33.0
SMB
CD214B-T12A
LE
CD214B-T12CA
BE
13.3
15.3
1.0
12
5.0
19.9
30.2
SMB
CD214B-T13A
LG
CD214B-T13CA
BG
14.4
16.5
1.0
13
5.0
21.5
27.9
SMB
CD214B-T14A
LK
CD214B-T14CA
BK
15.6
17.9
1.0
14
5.0
23.2
25.8
SMB
CD214B-T15A
LM
CD214B-T15CA
BM
16.7
19.2
1.0
15
5.0
24.4
24.0
SMB
CD214B-T16A
LP
CD214B-T16CA
BP
17.8
20.5
1.0
16
5.0
26.0
23.1
SMB
CD214B-T17A
LR
CD214B-T17CA
BR
18.9
21.7
1.0
17
5.0
27.6
21.7
SMB
CD214B-T18A
LT
CD214B-T18CA
BT
20.0
23.3
1.0
18
5.0
29.2
20.5
SMB
CD214B-T20A
LV
CD214B-T20CA
BV
22.2
25.5
1.0
20
5.0
32.4
18.5
SMB
CD214B-T22A
LX
CD214B-T22CA
BX
24.4
28.0
1.0
22
5.0
35.5
16.9
SMB
CD214B-T24A
LZ
CD214B-T24CA
BZ
26.7
30.7
1.0
24
5.0
38.9
15.4
SMB
CD214B-T26A
ME
CD214B-T26CA
CE
28.9
32.2
1.0
26
5.0
42.1
14.2
SMB
CD214B-T28A
MG
CD214B-T28CA
CG
31.1
35.8
1.0
28
5.0
45.4
13.2
SMB
SMB
CD214B-T30A
MK
CD214B-T30CA
CK
33.3
38.3
1.0
30
5.0
48.4
12.4
CD214B-T33A
MM
CD214B-T33CA
CM
36.7
42.2
1.0
33
5.0
53.3
11.3
SMB
CD214B-T36A
MP
CD214B-T36CA
CP
40
46.0
1.0
36
5.0
58.1
10.3
SMB
CD214B-T40A
MR
CD214B-T40CA
CR
44.4
51.1
1.0
40
5.0
64.5
9.3
SMB
CD214B-T43A
MT
CD214B-T43CA
CT
47.8
54.9
1.0
43
5.0
69.4
8.6
SMB
CD214B-T45A
MV
CD214B-T45CA
CV
50
57.5
1.0
45
5.0
72.7
8.3
SMB
CD214B-T48A
MX
CD214B-T48CA
CX
53.3
61.3
1.0
48
5.0
77.4
7.7
SMB
CD214B-T51A
MZ
CD214B-T51CA
CZ
56.7
65.2
1.0
51
5.0
82.4
7.3
SMB
CD214B-T54A
NE
CD214B-T54CA
DE
60
69
1.0
54
5.0
87.1
6.9
SMB
CD214B-T58A
NG
CD214B-T58CA
DG
64.4
74.6
1.0
58
5.0
93.6
6.4
SMB
CD214B-T60A
NK
CD214B-T60CA
DK
66.7
76.7
1.0
60
5.0
96.8
6.2
SMB
CD214B-T64A
NM
CD214B-T64CA
DM
71.1
81.8
1.0
64
5.0
103
5.8
SMB
CD214B-T70A
NP
CD214B-T70CA
DP
77.8
89.5
1.0
70
5.0
113
5.3
SMB
CD214B-T75A
NR
CD214B-T75CA
DR
83.3
95.8
1.0
75
5.0
121
4.9
SMB
CD214B-T78A
NT
CD214B-T78CA
DT
86.7
99.7
1.0
78
5.0
126
4.7
SMB
CD214B-T85A
NV
CD214B-T85CA
DV
94.4
109
1.0
85
5.0
137
4.4
SMB
CD214B-T90A
NX
CD214B-T90CA
DX
100
116
1.0
90
5.0
146
4.1
SMB
CD214B-T100A
NZ
CD214B-T100CA
DZ
111
128
1.0
100
5.0
162
3.7
SMB
CD214B-T110A
PE
CD214B-T110CA
EE
122
140
1.0
110
5.0
177
3.4
SMB
CD214B-T120A
PG
CD214B-T120CA
EG
133
153
1.0
120
5.0
193
3.1
SMB
CD214B-T130A
PK
CD214B-T130CA
EK
144
165
1.0
130
5.0
209
2.9
SMB
CD214B-T150A
PM
CD214B-T150CA
EM
167
192
1.0
150
5.0
243
2.5
SMB
CD214B-T160A
PP
CD214B-T160CA
EP
178
205
1.0
160
5.0
259
2.3
SMB
CD214B-T170A
PR
CD214B-T170CA
ER
189
218
1.0
170
5.0
275
2.2
SMB
Notes:
1. Suffix “A” denotes 5 % tolerance device.
2. Suffix “C” denotes Bidirectional device.
3. Suffix “CA” denotes 5 % tolerance Bidirectional device.
4. 10 % tolerance devices are available but not shown above.
5. For Bidirectional devices having VR = 10 Volts or under, the IR limit is double.
6. For Unidirectional devices having VF Max = 3.5 V at IF = 35 A, 0.5 Sine Wave of 8.3 ms pulse width.
7. For RoHS compliant devices, add suffix "LF" to part number.
47
CD214C Series (SMC Package)
Electrical Characteristics (@ TA = 25 °C unless otherwise noted)
Part Number
(Unidirectional
Device)
Part
Mrkg
Part Number
(Bidirectional
Device)
Part
Mrkg
Breakdown Voltage
VBR Volts
Min.
48
Max. @IT (mA)
Working Peak Max. Reverse
Reverse
Leakage
Voltage
at VRWM
VRWM (Volts)
IR (uA)
Max. Reverse
Max. Reverse
Voltage
Surge Current
at IRSM
VRSM (Volts)
Pkg
IRSM (Amps)
CD214C-T5.0A
GDE
CD214C-T5.0CA
BDE
6.40
7.23
10
5.0
1000
9.2
163
SMC
CD214C-T6.0A
GDG
CD214C-T6.0CA
BDG
6.67
7.67
10
6.0
1000
10.3
145.6
SMC
CD214C-T6.5A
GDK
CD214C-T6.5CA
BDK
7.22
8.3
10
6.5
500
11.2
133.9
SMC
CD214C-T7.0A
GDM
CD214C-T7.0CA
BDM
7.78
8.95
10
7.0
200
12.0
125
SMC
CD214C-T7.5A
GDP
CD214C-T7.5CA
BDP
8.33
9.58
1.0
7.5
100
12.9
116.3
SMC
CD214C-T8.0A
GDR
CD214C-T8.0CA
BDR
8.89
10.2
1.0
8.0
50
13.6
110.3
SMC
CD214C-T8.5A
GDT
CD214C-T8.5CA
BDT
9.44
10.8
1.0
8.5
20
14.4
104.2
SMC
CD214C-T9.0A
GDV
CD214C-T9.0CA
BDV
10.0
11.5
1.0
9.0
10
15.4
97.4
SMC
CD214C-T10A
GDX
CD214C-T10CA
BDX
11.1
12.8
1.0
10
5.0
17.0
88.2
SMC
CD214C-T11A
GDZ
CD214C-T11CA
BDZ
12.2
14.4
1.0
11
5.0
18.2
82.4
SMC
CD214C-T12A
GEE
CD214C-T12CA
BEE
13.3
15.3
1.0
12
5.0
19.9
75.3
SMC
CD214C-T13A
GEG
CD214C-T13CA
BEG
14.4
16.5
1.0
13
5.0
21.5
69.7
SMC
CD214C-T14A
GEK
CD214C-T14CA
BEK
15.6
17.9
1.0
14
5.0
23.2
64.7
SMC
CD214C-T15A
GEM
CD214C-T15CA
BEM
16.7
19.2
1.0
15
5.0
24.4
61.5
SMC
CD214C-T16A
GEP
CD214C-T16CA
BEP
17.8
20.5
1.0
16
5.0
26.0
57.7
SMC
CD214C-T17A
GER
CD214C-T17CA
BER
18.9
21.7
1.0
17
5.0
27.6
53.3
SMC
CD214C-T18A
GET
CD214C-T18CA
BET
20.0
23.3
1.0
18
5.0
29.2
51.4
SMC
CD214C-T20A
GEV
CD214C-T20CA
BEV
22.2
25.5
1.0
20
5.0
32.4
46.3
SMC
CD214C-T22A
GEX
CD214C-T22CA
BEX
24.4
28
1.0
22
5.0
35.5
42.2
SMC
CD214C-T24A
GEZ
CD214C-T24CA
BEZ
26.7
30.7
1.0
24
5.0
38.9
38.6
SMC
CD214C-T26A
GFE
CD214C-T26CA
BFE
28.9
32.2
1.0
26
5.0
42.1
35.6
SMC
CD214C-T28A
GFG
CD214C-T28CA
BFG
31.1
35.8
1.0
28
5.0
45.4
33
SMC
CD214C-T30A
GFK
CD214C-T30CA
BFK
33.3
38.3
1.0
30
5.0
48.4
31
SMC
CD214C-T33A
GFM
CD214C-T33CA
BFM
36.7
42.2
1.0
33
5.0
53.3
28.1
SMC
CD214C-T36A
GFP
CD214C-T36CA
BFP
40
46
1.0
36
5.0
58.1
25.8
SMC
CD214C-T40A
GFR
CD214C-T40CA
BFR
44.4
51.1
1.0
40
5.0
64.5
23.3
SMC
CD214C-T43A
GFT
CD214C-T43CA
BFT
47.8
54.9
1.0
43
5.0
69.4
21.6
SMC
CD214C-T45A
GFV
CD214C-T45CA
BFV
50
57.5
1.0
45
5.0
72.7
20.6
SMC
CD214C-T48A
GFX
CD214C-T48CA
BFX
53.3
61.3
1.0
48
5.0
77.4
19.4
SMC
CD214C-T51A
GFZ
CD214C-T51CA
BFZ
56.7
65.2
1.0
51
5.0
82.4
18.2
SMC
CD214C-T54A
GGE
CD214C-T54CA
BGE
60
69
1.0
54
5.0
87.1
17.2
SMC
CD214C-T58A
GGG
CD214C-T58CA
BGG
64.4
74.6
1.0
58
5.0
93.6
16
SMC
CD214C-T60A
GGK
CD214C-T60CA
BGK
66.7
76.7
1.0
60
5.0
96.8
15.5
SMC
CD214C-T64A
GGM
CD214C-T64CA
BGM
71.1
81.8
1.0
64
5.0
103
14.6
SMC
CD214C-T70A
GGP
CD214C-T70CA
BGP
77.8
89.5
1.0
70
5.0
113
13.3
SMC
CD214C-T75A
GGR
CD214C-T75CA
BGR
83.3
95.8
1.0
75
5.0
121
12.4
SMC
CD214C-T78A
GGT
CD214C-T78CA
BGT
86.7
99.7
1.0
78
5.0
126
11.4
SMC
CD214C-T85A
GGV
CD214C-T85CA
BGV
94.4
108.2
1.0
85
5.0
137
10.4
SMC
CD214C-T90A
GGX
CD214C-T90CA
BGX
100
115.5
1.0
90
5.0
146
10.3
SMC
CD214C-T100A
GGZ
CD214C-T100CA
BGZ
111
128
1.0
100
5.0
162
9.3
SMC
CD214C-T110A
GHE
CD214C-T110CA
BHE
122
140
1.0
110
5.0
177
8.4
SMC
CD214C-T120A
GHG
CD214C-T120CA
BHG
133
153
1.0
120
5.0
193
7.9
SMC
CD214C-T130A
GHK
CD214C-T130CA
BHK
144
165
1.0
130
5.0
209
7.2
SMC
CD214C-T150A
GHM
CD214C-T150CA
BHM
167
192
1.0
150
5.0
243
6.2
SMC
CD214C-T160A
GHP
CD214C-T160CA
BHP
178
205
1.0
160
5.0
259
5.8
SMC
CD214C-T170A
GHR
CD214C-T170CA
BHR
189
217.5
1.0
170
5.0
275
5.5
SMC
Notes:
1. Suffix “A” denotes 5 % tolerance device.
2. Suffix “C” denotes Bidirectional device.
3. Suffix “CA” denotes 5 % tolerance Bidirectional device.
4. 10 % tolerance devices are available but not shown above.
5. For Bidirectional devices having VR = 10 Volts or under, the IR limit is double.
6. For Unidirectional devices having VF Max = 3.5 V at IF = 35 A, 0.5 Sine Wave of 8.3 ms pulse width.
7. For RoHS compliant devices, add suffix "LF" to part number.
Bourns® Multifuse® Resettable Fuses
Selection Guide
• Designed to Withstand AC Power Cross
• Available in Matched Resistance “Bins”
• Agency Approvals - UL, CSA, TÜV
• Popular Footprints and Packaging
• Low Resistance
• Lead Free Options
• Custom Designs Available
• Package Types: SM, R, Disk, Strap
The range of Bourns® Multifuse® Polymer PTC
resettable fuses is designed to limit overcurrents in
telecommunications equipment as well as many
other types of equipment. Adequate overcurrent
protection is needed to allow equipment to comply
with international standards. Overcurrents can be
caused by AC power or lightning flash disturbances
that are induced or conducted to the telephone line.
Our extensive range offers multiple voltage variants
to suit specific application requirements.
Applications
• CPE and Central Office
• Access Equipment
• Hybrid-Fiber Coax
• Power over Ethernet
Features
• Resettable Circuit Protection
• Designed to Withstand Lightning Surge
Style 1
Style 2
A
Style 3
A
C
C
B
B
B
A
C
MF-R/90 Series – Radial Leaded, 90 Volts
Typical Applications: Hybrid-fiber coax, power passing taps, Power over Ethernet
Model
Ihold
V max.
(Amps @
(Volts)
23 °C)
MF-R055/90
0.55
MF-R055/90U
0.55
MF-R075/90
0.75
90
I max.
(Amps)
10
Initial
Resistance
(Ohms @
23 °C Min.)
1 Hour (R1)
Post-Trip
Resistance
(Ohms @
23 °C Max.)
0.45
RoHS Compliant
Dimensions [mm/(in)]
Style
A Max.
B Max.
2.0
10.9
(0.43)
14.0
(0.55)
0.45
2.0
10.3
(0.4)
10.3
(0.4)
0.37
1.65
11.9
(0.47)
15.5
(0.61)
C Nom.
5.1
(0.201)
1
49
MF-SM013/250 Series – Surface Mount, 60 Volts, 250 Vrms Short Duration Interrupt
Applicable Standards: ITU-T K.20/21/45, GR-1089-CORE Intrabuilding
Model
RoHS Compliant
1 Hour (R1)
Max. Interrupt
Ihold
Initial
Post-Trip
Ratings
(Amps V max. I max.
Resistance
Resistance
@
(Volts) (Amps)
(Ohms @
Volts Amps 23 °C Min.) (Ohms @
23 °C)
23 °C Max.)
(Vrms) (A)
MF-SM013/250-2
Dimensions
[mm/(in)]
Style
A
Max.
B
Max.
C
Nom.
6.5
MF-SM013/250-A-2
6.5
0.13
60
3.0
250
3
20.0
MF-SM013/250-B-2
9.0
MF-SM013/250-C-2
7.0
9.4
3.4
7.4
(0.370) (0.133) (0.291)
3
MF-RX/250 Series – Radial Leaded, 60 Volts, 250 Vrms Short Duration Interrupt
Fast Trip, Small Package. Applicable Standards: ITU-T K.20/21/45, GR-1089-CORE Intrabuilding
Model
1 Hour (R1)
Max. Interrupt
Ihold
Initial
Post-Trip
Ratings
(Amps V max. I max.
Resistance
Resistance
@
(Volts) (Amps)
(Ohms @
(Ohms @
Volts Amps
23 °C)
23 °C Min.)
23 °C Max.)
(Vrms) (A)
Dimensions
[mm/(in)]
Style
A
Max.
B
Max.
C
Nom.
MF-RX012/250
0.12
3.0
3
4.0
16.0
6.5
11.0
(0.256) (0.433)
MF-RX012/250-A
0.12
3.0
3
7.0
16.0
6.5
11.0
(0.256) (0.433)
MF-RX012/250-C
0.12
3.0
3
5.5
14.0
6.5
11.0
(0.256) (0.433)
MF-RX012/250-F
0.12
3.0
3
6.0
16.0
6.5
11.0
(0.256) (0.433)
MF-RX012/250-1
0.12
3.0
3
6.0
16.0
6.5
11.0
(0.256) (0.433)
MF-RX012/250-2
0.12
3.0
3
8.0
16.0
6.5
11.0
(0.256) (0.433)
MF-RX012/250-T
0.12
3.0
3
7.0
16.0
6.5
11.0
(0.256) (0.433)
MF-RX012/250U
0.12
3
6.0
16.0
5.1
6.0
10.0
(0.236) (0.394) (0.201)
MF-RX014/250
0.145
3.0
3
3.0
14.0
6.5
11.0
(0.256) (0.433)
MF-RX014/250-A
0.145
3.0
3
3.0
12.0
6.5
11.0
(0.256) (0.433)
MF-RX014/250-B
0.145
3.0
3
4.5
14.0
6.5
11.0
(0.256) (0.433)
MF-RX014/250-T
0.145
3.0
3
5.4
14.0
6.5
11.0
(0.256) (0.433)
MF-RX014/250U
0.145
3.0
3
3.5
12.0
6.0
10.0
(0.236) (0.394)
MF-RX018/250
0.18
10.0
10
0.8
4.0
11.0
13.6
(0.433) (0.535)
MF-RX018/250U
0.18
10.0
10
0.8
4.0
10.4
12.6
(0.409) (0.496)
RX
240012
01K
50
RoHS Compliant
60
3.0
250
2
MF-R/600 Series – Radial Leaded, 60 Volts, 600 Vrms Short Duration Interrupt
Applicable Standards: UL60950, GR-1089-CORE, ITU-T K.20/21/45
Model
RoHS Compliant
1 Hour (R1)
Max. Interrupt
Ihold
Initial
Post-Trip
Ratings
(Amps V max. I max.
Resistance
Resistance
@
(Volts) (Amps)
(Ohms @
Volts Amps 23 °C Min.) (Ohms @
23 °C)
23 °C Max.)
(Vrms) (A)
Dimensions
[mm/(in)]
Style
A
Max.
B
Max.
C
Nom.
MF-R015/600
0.15
6.0
22.0
13.5
(0.531)
MF-R015/600-A
0.15
7.0
20.0
13.5
(0.531)
MF-R015/600-B
0.15
9.0
22.0
13.5
(0.531)
MF-R015/600-F
0.15
7.0
22.0
13.5
12.6
6.0
(0.531) (0.496) (0.236)
MF-R016/600
0.16
4.0
18.0
16.0
(0.629)
MF-R016/600-A
0.16
4.0
16.0
16.0
(0.629)
MF-R016/600-1
0.16
4.0
17.0
16.0
(0.629)
R
24 015
00
1K
60
3.0
600
3
Device Options:
Packaging Options:
• Coated or Uncoated
• Un-Tripped or Pre-Tripped
• Narrow Resistance Bands
• Custom Specified Resistance Bands
• Resistance Sort to 0.5 Ohm Bins
• Disks With and Without Solder Coating
• Bulk Packed
• Tape and Reel
• Custom Lead Lengths
2
51
Selection of Surface Mount Low Voltage Products
Features
Applications
• Industry Standard Sizes
• Resettable Circuit Protection
• Agency Approvals - UL, CSA, TÜV.
• Popular Footprints and Packaging
• Low Resistance
• Lead Free Options
• Custom Designs Available
• Computers and Peripherals
• General Electronics
• Automotive
• Set-top Boxes
• Servers & Routers
Style 1
Style 2
Style 3
C
A
A
C
C
B
B
B
A
Side View
End View
Top and Bottom View
Side View
Top and Bottom View
Side View
MF-SMDF Series – Surface Mount (Lead Free), 10-60 Volts
2018 Package. Typical Application: Power over Ethernet. Applicable Standard: IEEE 802.3AF.
Model
MF-SMDF050
MF-SMDF150
Ihold
V max.
(Amps @
(Volts)
23 °C)
0.50
1.50
60
15
I max.
(Amps)
Initial
Resistance
(Ohms @
23 °C Min.)
1 Hour (R1)
Post-Trip
Resistance
(Ohms @
23 °C Max.)
0.20
0.95
10
40
0.07
0.175
Initial
Resistance
(Ohms @
23 °C Min.)
1 Hour (R1)
Post-Trip
Resistance
(Ohms @
23 °C Max.)
RoHS Compliant
Dimensions [mm/(in)]
Style
A Max.
B Max.
5.44
(0.214)
4.93
(0.194)
C Nom.
1.09
(0.043)
3
0.85
(0.033)
MF-SM Series – Surface Mount, 15-33 Volts
3425 Package. Typical Application: Circuit Level Protection.
Model
Ihold
V max.
(Amps @
(Volts)
23 °C)
I max.
(Amps)
MF-SM150
1.50
15
100
0.06
0.25
MF-SM150/33
1.50
33
40
0.06
0.23
MF-SM200
2.00
15
100
0.045
0.125
MF-SM250
2.50
15
100
0.024
0.085
Note:
RoHS compliant by adding -99 at the end of the part number, i.e. MF-SM150-2-99.
52
Dimensions [mm/(in)]
Style
A Max.
B Max.
C Nom.
9.50
(0.374)
3.00
(0.118)
6.71
(0.264)
1
MF-SM Series – Surface Mount, 6-60 Volts
2920 Package. Typical Application: Circuit Level Protection.
Model
Ihold
V max.
(Amps @
(Volts)
23 °C)
I max.
(Amps)
Initial
Resistance
(Ohms @
23 °C Min.)
1 Hour (R1)
Post-Trip
Resistance
(Ohms @
23 °C Max.)
MF-SM030
0.30
60
40
0.90
4.80
MF-SM050
0.50
60
40
0.35
1.40
MF-SM075
0.75
30
80
0.23
1.00
MF-SM100
1.10
30
80
0.12
0.48
MF-SM100/33
1.10
33
40
0.12
0.41
MF-SM125
1.25
15
100
0.07
0.25
MF-SM260
2.60
6
100
0.025
0.075
Dimensions [mm/(in)]
Style
A Max.
B Max.
C Nom.
7.98
(0.314)
3.18
(0.125)
5.44
(0.214)
1
Note:
RoHS compliant by adding -99 at the end of the part number.
MF-MSMF Series – Surface Mount (Lead Free), 6-60 Volts
1812 Package. Typical Application: USB 2.0.
Model
RoHS Compliant
Ihold
V max.
(Amps @
(Volts)
23 °C)
I max.
(Amps)
Initial
Resistance
(Ohms @
23 °C Min.)
1 Hour (R1)
Post-Trip
Resistance
(Ohms @
23 °C Max.)
MF-MSMF010
0.10
60
40
0.70
15.0
MF-MSMF014
0.14
60
40
0.40
6.50
MF-MSMF020
0.20
30
80
0.40
6.00
MF-MSMF030
0.30
30
10
0.30
3.00
MF-MSMF050
0.50
15
100
0.15
1.00
MF-MSMF075
0.75
13.2
100
0.11
0.45
MF-MSMF075/24
0.75
24
40
0.11
0.45
MF-MSMF110
1.10
6
100
0.04
0.21
MF-MSMF110/16
1.10
16
100
0.04
0.21
MF-MSMF125
1.25
6
100
0.035
0.14
MF-MSMF150
1.50
6
100
0.03
0.12
MF-MSMF160
1.60
8
100
0.035
0.099
MF-MSMF200
2.00
6
100
0.020
0.1
MF-MSMF250/16
2.50
16
100
0.015
0.1
MF-MSMF260
2.60
6
100
0.015
0.08
Dimensions [mm/(in)]
Style
A Max.
B Max.
C Nom.
1.10
(0.043)
4.73
(0.186)
3.41
(0.134)
3
0.85
(0.033)
53
MF-MSMD Series – Surface Mount, 6-60 Volts
1812 Package. Typical Application: USB 2.0.
Model
Ihold
V max.
(Amps @
(Volts)
23 °C)
I max.
(Amps)
Initial
Resistance
(Ohms @
23 °C Min.)
1 Hour (R1)
Post-Trip
Resistance
(Ohms @
23 °C Max.)
MF-MSMD010
0.10
60
40
0.70
15.000
MF-MSMD014
0.14
60
40
0.40
6.500
MF-MSMD020
0.20
30
80
0.40
6.000
MF-MSMD030
0.30
30
10
0.30
3.000
MF-MSMD050
0.50
15
100
0.15
1.000
MF-MSMD075
0.75
13.2
100
0.11
0.450
MF-MSMD110
1.10
6
100
0.04
0.210
MF-MSMD125
1.25
6
100
0.035
0.140
MF-MSMD150
1.50
6
100
0.03
0.120
MF-MSMD160
1.60
8
100
0.035
0.099
MF-MSMD200
2.00
6
100
0.020
0.100
MF-MSMD260
2.60
6
100
0.015
0.080
I max.
(Amps)
Initial
Resistance
(Ohms @
23 °C Min.)
1 Hour (R1)
Post-Trip
Resistance
(Ohms @
23 °C Max.)
Dimensions [mm/(in)]
Style
A Max.
4.73
(0.186)
B Max.
C Nom.
3.41
(0.134)
0.81
(0.032)
0.81
(0.032)
0.81
(0.032)
0.81
(0.032)
0.62
(0.024)
0.62
(0.024)
0.62
(0.024)
0.48
(0.019)
0.48
(0.019)
0.48
(0.019)
0.48
(0.019)
0.48
(0.019)
2
MF-USMD Series – Surface Mount, 6-30 Volts
1210 Package. Typical Application: USB 2.0.
Model
Ihold
V max.
(Amps @
(Volts)
23 °C)
0.05
30
10
2.80
50.0
MF-USMD010
0.10
30
10
0.80
15.0
MF-USMD020
0.20
30
10
0.40
5.00
MF-USMD035
0.35
6
40
0.20
1.30
MF-USMD050
0.50
13.2
40
0.18
0.90
MF-USMD075
0.75
6
40
0.07
0.45
MF-USMD110
1.10
6
40
0.05
0.21
Style
A Max.
B Max.
C Nom.
2.80
(0.110)
0.85
(0.033)
0.85
(0.033)
0.85
(0.033)
0.62
(0.024)
0.62
(0.024)
0.62
(0.024)
0.48
(0.019)
5
7
0
MF-USMD005
Dimensions [mm/(in)]
54
3.43
(0.135)
2
MF-NSMF Series – Surface Mount (Lead Free), 6-30 Volts
1206 Package. Typical Application: USB On The Go
Model
Ihold
V max.
(Amps @
(Volts)
23 °C)
RoHS Compliant
I max.
(Amps)
Initial
Resistance
(Ohms @
23 °C Min.)
1 Hour (R1)
Post-Trip
Resistance
(Ohms @
23 °C Max.)
MF-NSMF012
0.12
30
10
1.50
6.0
MF-NSMF020
0.20
24
10
0.60
2.60
MF-NSMF035
0.35
6
100
0.30
1.20
MF-NSMF050
0.50
13.2
100
0.15
0.70
MF-NSMF075
0.75
6
100
0.10
0.29
MF-NSMF110
1.10
6
100
0.06
0.20
MF-NSMF150
1.50
6
100
0.03
0.13
Dimensions [mm/(in)]
Style
A Max.
3.4
(0.134)
B Max.
C Nom.
1.8
(0.071)
1.10
(0.043)
0.85
(0.033)
0.85
(0.033)
0.85
(0.033)
0.70
(0.028)
0.70
(0.028)
0.70
(0.028)
3
55
Selection of Radial Low Voltage Products
Features
Applications
• Bulk and Tape and Reel Packaging
• Resettable Circuit Protection
• Agency Approvals - UL, CSA, TÜV.
• Popular Footprints and Packaging
• Low Resistance
• Lead Free Options
• Custom Designs Available
• Computers and Peripherals
• General Electronics
Style 1
Style 2
Style 3
A
A
Style 4
Style 5
A
A
A
B
B
B
B
B
C
C
C
C
C
MF-RX/72 Series – Radial Leaded, 72 Volts
Typical Application: Transformer
Model
RX
240012
01K
56
RoHS Compliant
Ihold
V max.
(Amps @
(Volts)
23 °C)
I max.
(Amps)
Initial
Resistance
(Ohms @
23 °C Min.)
1 Hour (R1)
Post-Trip
Resistance
(Ohms @
23 °C Max.)
MF-RX110/72
1.10
0.15
0.38
MF-RX135/72
1.35
0.12
0.30
MF-RX160/72
1.60
0.09
0.22
MF-RX185/72
1.85
0.08
0.19
MF-RX250/72
2.50
0.05
0.13
MF-RX300/72
3.00
0.04
0.10
MF-RX375/72
3.75
0.03
0.08
72.0
40
Dimensions [mm/(in)]
Style
A Max.
B Max.
C Nom.
10.84
(0.427)
12.26
(0.483)
13.94
(0.549)
15.18
(0.598)
17.84
(0.702)
20.67
(0.814)
23.51
(0.926)
16.8
(0.663)
18.3
(0.720)
19.9
(0.785)
21.2
(0.834)
23.8
(0.939)
26.7
(1.050)
29.6
(1.162)
5.1
(0.021)
5.1
(0.021)
5.1
(0.021)
5.1
(0.021)
10.2
(0.402)
10.2
(0.402)
10.2
(0.402)
2
MF-R Series – Radial Leaded, 16-60 Volts
Typical Application: Transformer
Model
R00
5
R0
10
Ihold
V max.
(Amps @
(Volts)
23 °C)
I max.
(Amps)
Initial
Resistance
(Ohms @
23 °C Min.)
1 Hour (R1)
Post-Trip
Resistance
(Ohms @
23 °C Max.)
MF-R005
0.05
60
7.3
22
MF-R010
0.1
60
2.5
7.5
MF-R017
0.17
60
2
8
MF-R020
0.2
60
1.5
4.4
MF-R025
0.25
60
1
3
MF-R030
0.3
60
0.76
2.1
MF-R040
0.4
60
0.52
1.29
MF-R050
0.5
60
0.41
1.17
MF-R065
0.65
60
0.27
0.72
MF-R075
0.75
60
0.18
0.6
MF-R090
0.9
60
0.14
0.47
MF-R090-0-9
0.9
30
0.07
0.22
MF-R110
1.1
30
0.1
0.27
MF-R135
1.35
30
0.065
0.17
MF-R160
1.6
30
0.055
0.15
MF-R185
1.85
30
0.04
0.11
MF-R250
2.5
30
0.025
0.07
MF-R250-0-10
2.5
30
0.025
0.07
MF-R300
3
30
0.02
0.08
MF-R400
4
30
0.01
0.05
MF-R500
5
30
0.01
0.05
MF-R600
6
30
0.005
0.04
MF-R700
7
30
0.005
0.03
MF-R800
8
30
0.005
0.03
MF-R900
9
30
0.005
0.02
MF-R1100
11
16
0.003
0.014
R25
0
R60
0
40
100
Dimensions [mm/(in)]
Style
A Max.
B Max.
C Nom.
8.0
(0.315)
7.4
(0.291)
7.4
(0.291)
7.4
(0.291)
7.4
(0.291)
7.4
(0.291)
7.4
(0.291)
7.9
(0.311)
9.7
(0.382)
10.4
(0.409)
11.7
(0.461)
7.4
(0.291)
8.9
(0.350)
8.9
(0.350)
10.2
(0.402)
12.0
(0.472)
12.0
(0.472)
11.4
(0.449)
12.0
(0.472)
14.4
(0.567)
17.4
(0.685)
19.3
(0.760)
22.1
(0.870)
24.2
(0.953)
24.2
(0.953)
24.2
(0.953)
8.3
(0.327)
12.7
(0.500)
12.7
(0.500)
12.7
(0.500)
12.7
(0.500)
13.4
(0.528)
13.7
(0.539)
13.7
(0.539)
15.2
(0.598)
16.0
(0.630)
16.7
(0.657)
12.2
(0.480)
14.0
(0.551)
18.9
(0.744)
16.8
(0.661)
18.4
(0.724)
18.3
(0.720)
18.3
(0.720)
18.3
(0.720)
24.8
(0.976)
24.9
(0.980)
31.9
(1.256)
29.8
(1.173)
32.9
(1.295)
32.9
(1.295)
32.9
(1.295)
5.1
(0.021)
5.1
(0.021)
5.1
(0.021)
5.1
(0.021)
5.1
(0.021)
5.1
(0.021)
5.1
(0.021)
5.1
(0.021)
5.1
(0.021)
5.1
(0.021)
5.1
(0.021)
5.1
(0.021)
5.1
(0.021)
5.1
(0.021)
5.1
(0.021)
5.1
(0.021)
5.1
(0.021)
5.1
(0.021)
5.1
(0.021)
5.1
(0.021)
10.2
(0.402)
10.2
(0.402)
10.2
(0.402)
10.2
(0.402)
10.2
(0.402)
10.2
(0.402)
4
1
1
1
1
1
1
1
1
1
1
3
1
1
1
1
2
3
2
2
2
2
2
2
2
2
Note:
RoHS compliant by adding -99 at the end of the part number, i.e. MF-R010-2-99.
57
LPM – Line Protection Modules
Features
Custom Designs
• Precision Thick-film Technology
• Withstands Lightning and AC Power Cross
• Assists Compliance with Telecordia (Bellcore)
GR-1089
• Assists Compliance with ITU-T K.20
• Surface Mount Solution
• Designed to Fail Safely under Fault Conditions
• Optional One-shot Thermal Fuse
• Optional Resettable PTC
• UL 497A Recognized
• Non-flammable
• Standard Offerings
• Custom Designs
• Full Qualification Test Capabilities
• Central Office, Remote and Customer Premises
Equipment Applications Include:
- Analog Line Cards - xDSL Line Cards
- Pairgain - VoIP
- PBX systems - External and
- LCAS Protection Intra-buildings
In addition to the various standard off-the-shelf
versions available, Bourns offers extensive custom
options. Examples include:
Model
• Variety of Packages, e.g. Vertical and Horizontal
SMD
• Packaging Options, e.g. Trays, Tape and Reel, Bulk
• Additional Resistors, e.g. Ringing Power Resistors
• Additional Components, e.g. Fuses, PTCs,
Overvoltage Protection
• Resistors from 5.6 Ω
• Ratio Matching: Down to 0.3 %, or Less with
Special Limitations
For more information on custom packaging options
please see page 74 and 75 for our full capability. Please
contact your local representative to discuss custom
packaging options.
Schematic
Dimensions
Description
51.05
MAX.
(2.010)
MAX.
4B08B-511-500
F1
R1
3
5
R2
7
8
12
2.03
(.080)
MAX.
11.30
(.445)
F2
13
15
17
3.43 ± .38
(.135 ± .015)
7.62
(.300)
3
5
7 8
10.16
(.400)
5.08
(.200)
12
13
15
2.54
(.100)
1
2
4B06B-512-RC
9
3
11 12 13
F1
1.27
(.050)
11.43
MAX.
(.450)
1 2 3
1.27
(.050)
DIMENSIONS =
MILLIMETERS
(INCHES)
11 12 13
20.32
(.800)
0.36
(.014)
MAX.
3.18
(.125)
MAX.
F2
R2
58
10
17.78 ± .254
(.700 ± .010)
2.54 ± .127
(.100 ± .005)
33.27
MAX.
(1.310)
R1
2
2
2.54 ± .127
(.100 ± .005)
*User must short pins 9 & 10 on the circuit board.
1
2.03
(.080)
MAX.
11.30 ± 0.50
(.450 ± .020)
4B04B-502-RC
1
0.36
(.014)
• 2x 50 Ω, 1 %
• 0.5 % matching
• Thermal fuses
.51
(.020)
25.40 ± 0.50
(1.000 ± .020)
Functional Schematic*
17
2.54
(.100)
2.29
(.090)
MAX.
0.36
(.014)
MAX.
• 1x R Ω, 5 %
• Values 5.6-100 Ω
• Thermal fuse
• 2x R Ω, 5 %
• Values 5.6-100 Ω
• 0.5 % matching
• Thermal fuses
Model
Schematic
Dimensions
5.10 ± .13
(0.200 ± .005)
2
2.54 ± .13
(0.100 ± .005)
22.35 ± .13
(0.880 ± .005)
2
3
1.02 ± .05
(0.040 ± .002)
22.35 ± .05
(0.880 ± .002)
RADIUS
.38
(.015)
MAX.
3
4A08P-505-RC
1
4
1
4.10 ± .25
(0.160 ± .010)
22.50 ± .38
(0.885 ± .015)
1.270 ± .127 1.270 ± .127
(0.050 ± .005) (0.050 ± .005)
0.25 ± .05
(0.010 ± .002)
4
0.51 ± .05
(0.020 ± .002)
2.54 ± .13
(0.100 ± .005)
12.70 ± .13
(0.500 ± .005)
2.80
(.110)
12.70
(.500)
14.59
(.575)
R1B
F2B
F1B
22
21
19
15
13
12
1
2
4
8
10
11
F1A
4A12P-516-500
DCODE
1 2
4
3.72
(.146)
10.16 ± .13
(.400 ± .005)
5.08 ± .13
(.200 ± .005)
F2A
R1A
R2A
8
2.54 ± .13
(.100 ± .005)
4.07 ± .25
(.160 ± .010)
12.32
(.485)
MAX.
R4
4B06B-514-500
1
2
4
6
8
9
R1
11
3
1,8
9
0.36
(.014)
MAX.
2.54
(.100)
2 PLCS.
14
13
APPROXIMATE
TISP® LOCATION
4.57
(.180)
MAX.
35.56
MAX.
(1.400)
MAX.
F1
8
12.70
(.500)
4B07B-530-400
DCODE
MAX.
1.91
(.075)
F2
3.43 ± .38
(.135 ± .015)
1.27
2 PLCS.
(.050)
R2
1 2 3
11 12 13 14
5 PLCS.
2.54
(.100)
20.32
(.800)
1
2
11
3
F1
12
13
MAX.
11.43
(.450)
TISP
4B06B-540-V(B01) /V(B02)
DCODE
TISP
F2
R2
MAX.
0.36
(.014)
APPROXIMATE
TISP® LOCATION
4.57
(.180)
MAX.
33.02
MAX.
(1.300)
4B06B-540-125/219
• 2x 40 Ω, 2 %
• 0.5 % matching
• Integrated
overvoltage
TISP®
APPROXIMATE
FUSE LOCATIONS
TISP V(B01) TISP V(B02)
R1
• 2x 50 Ω, 1 %
• 1.0 % matching
• Resettable
Multifuse® PPTC
APPROXIMATE
FUSE LOCATIONS
2
12
6
3.43 ± .38
(.135 ± .015)
61089B
2
2
4
5.08
(.200)
3 PLCS.
4,5
6,7
1
4B06B-514-500
DCODE
1
2.54
(.100)
2 PLCS.
4B07B-530-400
4.32
(.170)
MAX.
R2
R3
• 4x 50 Ω, 1 %
• 0.5 % matching
• Thermal fuses
10 11
25.65
MAX.
(1.010)
R1
• 2x R Ω, 5 %
• Values 5.6-100 Ω
• 1 % matching
MAX.
7.87
(.310)
32.81
MAX.
(1.292)
R2B
4A12P-516-500
Description
3.43 ± .38
(.135 ± .015)
1.27
2 PLCS.
(.050)
DIMENSIONS =
1 2 3
11 12 13
20.32
(.800)
4 PLCS.
2.54
(.100)
MAX.
1.91
(.075)
0.97
(.038)
0.36
MAX.
(.014)
• 2x 10 Ω, 5 %
• 2.0 % matching
• Integrated
overvoltage
TISP®
MILLIMETERS
(INCHES)
59
Bourns® Telefuse™ Telecom Fuses
Selection Guide
Features
• For Use in Telecommunication Circuit Applications
Requiring Low Current Protection with High Surge
Tolerance
• Overcurrent Protection to Telcordia
GR-1089-CORE & UL 1950/60950
• Ideal for Protecting Central Office and Customer
Premises Equipment, including POTS, T1/E1,
ISDN and xDSL circuits
• Model B1250T Allows Overcurrent Compliance
with Telecom Specifications including Telcordia
GR-1089-CORE, UL 60950 and
ITU K.20, K.21 and K.44
• Model B0500T is a Lower Current Version for Use
in Applications where a Faster Opening Time May
be Required
• Bourns® TISP® Thyristor Surge Protector Products
are Recommended for the Overvoltage Section of
the Circuit
• Agency Recognition: File: E198545
Model
Number
Ampere
Rating
(A)
Voltage
Rating
(Vrms)
Typical Cold
Resistance
(ohms)
Peak Surge
Current*
(Amps)
Power Fault
2.2 A, 600 V
Clearing Time
Max. (minutes)
Maximum
Power
Dissipation
(W)
0.5
B0500T
0.500
600
0.350
25
2
0.25
1.2
B1250T
1.25
600
0.090
100
15
0.40
0
5
*50 pulses @ 1 kV 10/1000 µs
Body Material: Ceramic with tin plated brass caps
Solder: Lead free
Packaging: 2,000 pcs. per 13 ˝ reel
Product Dimensions
Recommended Pad Layout
2.03 ± .102
(.080 ± .004)
3.81
(.15)
4.06
(.16)
9.65 ± .254
(.38 ± .01)
3.05 ± .127
(.120 ± .005)
5.08
(.20)
3.05 ± .127
(.120 ± .005)
DIMENSIONS =
60
MILLIMETERS
(INCHES)
ESD Components
ESD Overview
Electrostatic Discharge (ESD) is the transfer of
electric charge between bodies of different
electrostatic potential in proximity or through direct
contact. The most common ESD event occurs from
touching a metal doorknob or elevator button after
walking across a carpet. Walking across a carpet in
shoes with insulating soles causes the build up of
static electricity on a person. In effect, the person
becomes a charged capacitor which discharges to the
metal object.
The International Electrotechnical Commission
(IEC) developed a human model ESD test generator
which would allow designers to verify equipment
ESD performance. The IEC defines an ESD test
current impulse as having a rise time of less than 1
ns and decay time of 60 ns to 27 % as shown in the
graph. The IEC ESD standard is IEC 61000-4-2
(2001-04) and it specifies four standard peak test
generator voltages for air discharge and contact
discharge together with a higher user defined level.
Integrated Circuits (ICs) are ESD sensitive devices
and their manufacturers design protection elements
into the IC to increase its robustness. However, these
protection circuits can add cost to the design by
consuming silicon real estate. IC manufacturers
design ICs to withstand a minimum IEC 61000-4-2
2 kV contact discharge voltage to provide protection
during the board manufacturing process. Human
body ESD voltages are nature determined and can be
15 kV or more, which may damage an IC. The
highest standard air discharge voltage of IEC610004-2 is 15 kV to take this into account. Therefore, it is
common practice to protect all “people interactive”
data ports to a 15 kV level to avoid product damage
during installation, use and servicing. Therefore, an
external ESD protector provides the main level of
protection with IC protection elements providing
residual protection.
IEC61000-4-2
Level
Contact Voltage
(kV)
Air Discharge
Voltage
(kV)
Peak Contact
Current
(A)
Contact Current
@ 30 ns
(A)
Contact Current
@ 60 ns
(A)
Level 1
2
2
7.5
4
2
Level 2
4
4
15
8
4
Level 3
6
8
22.5
12
6
Level 4
8
15
30
16
8
61
Bourns® ChipGuard® ESD Clamp Protection Products
Selection Guide
Features
Bourns® ChipGuard® electrostatic discharge (ESD)
protectors are based on a multilayer zinc oxide
varistor (MLV) technology. The MLV technology
provides excellent electrical performance with a
competitive solution for many ESD requirements.
• Designed to protect sensitive electronic circuits
from the threat of ESD to IEC 61000-4-2 level 4
• 0402 and 0603 type packages
MLA Series – General ESD Protection
IC Power Supplies, Low Frequency Signal & Control Line Protection
Continuous Operating
Voltage
<50 µA
Model
Impulse
Clamping
WTM
Capacitance
Current
Voltage
(Max.)
CP (pF) Typ.
ITM (Max.)
VC (V)
(J)
1 Vrms @ 1
(A)
1 A @ 8/20 µs
10/1000 µs
MHz
@ 8/20 µs
V rms (V)
V DC (V)
CG0402MLA-5.5MG
4
5.5
19
CG0402MLA-14KG
11
14
38
CG0402MLA-18KG
14
18
45
95
CG0603MLA-5.5ME
4
5.5
19
300
CG0603MLA-14KE
11
14
35
300
20
0.05
100
160
30
0.1
CG0603MLA-18KE
14
18
40
140
CG0603MLA-26KE
20
26
58
120
MLC Series – High Speed Data and Communication Ports
USB 2.0, IEEE-1394, SCSI, DVI, Antenna and 1 Gb Ethernet
Continuous
Operating Voltage
VDC
(V)
62
Clamping Voltage
VC
(V)
Typ.
Max.
Typ.
Max.
CG0603MLC-05E
5
6
20
35
CG0603MLC-12E
12
30
50
Off-state
Current
IL Max.
nA
Trigger
Voltage
VT
V
1 Vrms @ 1 MHz
VDC = max. rating
50
150
Capacitance
Coff Max.
pF Max.
0.5
MLD Series – High Speed Data Applications
USB 2.0, IEEE-1394, 10/100 Mb Ethernet
Model
Continuous
Operating
Voltage
V DC
(V) Max.
Breakdown
Voltage
VB @ 1 mA
(V) Typ.
Clamping
Voltage
VC @ 1 A
8/20 µs (V)
Max.
Off-state
Current
IL (µA)
Max.
Capacitance
COFF (pF)
Max.
12
50 ~ 60
140
1
5
CG0402MLD-12G
CG0603MLD-12E
MLE Series – High Speed Protection Lines
Ethernet, RS232, RS485 ports
Continuous
Operating Voltage
Model
Vrms
(V)
VDC
(V)
Max.
Typ.
Max.
8.5
12
18
CG0402MLE-18G
CG0603MLE-18E
Clamping Voltage
VCLAMP (V)
Typ.
8 kV ESD
Contact
15 kV
ESD Air
1A@
8/20 µs
100
120
50
Off-state Current
IL (µA)
Max.
3.5 V 5.5 V
60
60
12 V 18 V 1 Vrms @ 1 MHz
9
0.3
40
9V
Capacitance
CP (pF)
Max.
0.4 0.5
1
10
50
Notes:
1. All electrical characteristics @ 25 °C unless otherwise stated.
2. Bourns® ChipGuard® electrostatic discharge (ESD) protectors are currently limited to a small range of voltage options. However, the MLV
process allows a wider range to be manufactured. Should a voltage that is not highlighted in the current selection be required, please
inquire with your local representative as Bourns plans to expand the family in the future.
63
Diode Arrays for ESD Protection
Selection Guide
Bourns offers a family of Diode Arrays for ESD
protection. The ESD protection is implemented
using Zener or TVS diodes in a Chip Scale Package
(CSP) connected directly to the I/O port, or
alternatively using Schottky diodes in a leaded QSOP
package connected in a rail-to-rail configuration.
Depending on the end application, the number of
ports for protection and maximum capacitance levels
can be selected from the table.
Features
2DAA ESD Diode Array – Package Schematic
2DAB ESD Diode Array – Package Schematic
• Diode Array
• Stable TFOS Technology
• JEDEC Standard Packages
• ESD Protection: IEC61000-4-2
Applications
• Bidirectional Parallel Port Communications
• Computers & Peripherals
• Instrumentation
EXT1
EXT4
EXT1
EXT4
GND
GND
GND
EXT5 OR
GND
EXT2
EXT3
EXT2
EXT3
2DAC ESD Diode Array – Package Schematic
GND
16
15
14
13
12
11
10
GND
9
2DAD ESD Diode Array – Package Schematic
EXT1
EXT2
GND
EXT4
1
GND
2
3
4
5
6
7
8
GND
2DEA ESD Diode Array – Package Schematic
VDD
24 23
1
64
2
22
21 20
3
4
5
VSS
19 18 17 16
6 7
VSS
8
9
15 14 13
10 11
12
VDD
EXT3
Application
Cap Value
(pF)
I/O Ports
4
150
4 or (5 Uni)
150
ESD
Diode Array
Part Numbers
ESD Withstand
(IEC 61000-4-2)
Minimum
±8 kV Contact
±15 kV Air
Tape & Reel
Tubes
2DAA-F6R
–
2DAB-F6R
–
2DAC-C16R
–
12
10.5
4
15
2DAD-C5R
–
20
5
2DEA-2-Q24R
2DEA-2-Q24T
Note:
For Lead Free solution, add “LF” suffix to part number above.
CSP Package – 5 I/O
CSP Package – 6 I/O
0.490 - 0.524
(0.019 - 0.021)
0.432 - 0.559
(0.017 - 0.022)
0.3
DIA.
(0.012)
A1
0.15 - 0.005
DIA.
(0.006 - 0.0002)
C1
A1
B1
A2
B2
A3
B3
0.50
(0.020)
0.435
(0.017)
B2
1.285 - 1.375
(0.051 - 0.054)
0.435
(0.017)
A3
0.330 - 0.457
(0.013 - 0.018)
0.180 - 0.280
(0.007 - 0.011)
0.180 - 0.280
(0.007 - 0.011)
0.414 - 0.424
(0.016 - 0.017)
0.180 - 0.280
(0.007 - 0.011)
0.180 - 0.280
(0.007 - 0.011)
0.50
(0.020)
0.50
(0.020)
0.965 - 1.015
(0.038 - 0.040)
0.971 - 1.001
(0.038 - 0.039)
MICRONS
(MILS)
DIMENSIONS =
MICRONS
(MILS)
DIMENSIONS =
CSP Package – 16 I/O
QSOP Package Dimensions
BUMP A1/PIN 1
INDICATOR
858 ± 40
(33.78 ± 1.57)
B2
A2
.635
TYP.
(.025)
C1
D1
C2
D2
A3
B3
C3
A4
B4
C4
D3
500
(19.69)
248.5 ± 45
(9.78 ± 1.78)
3.81 - 3.99
(.150 - .157)
2177 ± 45
(85.71 ± 1.78)
300
DIA.
(11.81)
500
(19.69)
8.56 - 8.74
(.337 - .344)
248.5 ± 45
(9.78 ± 1.78)
428.5 ± 45
(16.87 ± 1.78)
B1
A1
225 ± 20
(8.86 ± 0.79)
1.475 - 1.525
(0.058 - 0.060)
0.50
(0.020)
C3
BOURNS
LOGO
D4
45 ± 45
(1.78 ± 1.78)
45 ± 45
(1.78 ± 1.78)
1997 ± 45
(78.62 ± 1.78)
DIMENSIONS =
.21 - .31
(.008 - .012)
PIN 1
1.35 - 1.75
(.053 - .069)
MICRONS
(MILS)
.10 - .25
(.004 - .010)
.19 - .25
(.007 - .010)
0-8
5.80 - 6.20
(.228 - .244)
DIMENSIONS =
.41 - 1.27
(.016 - .050)
MILLIMETERS
(INCHES)
65
Outside Plant Products
Bourns offers a full line of Overvoltage Protectors
based on our Gas Discharge Tube (GDT) and
patented Multi-Stage Protection (MSP®) technology.
Products include 5-Pin Protectors for Central Office
and Building Entrance protection, as well as Station
Protectors and POTS splitters for Network Interface
Devices (NID) for customer premises protection.
Our 241x and 242x series 5-Pin Protectors are highly
reliable and cost effective solutions for Central Office
and Building Entrance protection. We offer a wide
variety of color coded modules with custom
configurations. Both series are available with GDT or
MSP® technology, offering long surge life, high surge
handling capability and low capacitance for
broadband applications.
For Customer Premises, we offer a complete line of
fully modular Network Interface Devices available
from one to one hundred lines. The NIDs are
available in fire retardant, ultraviolet resistant plastic
or zinc coated, rust resistant metal housings. All
NIDs are designed to provide maximum wire
management space and flexibility and are available in
many custom configurations, including our 1740
series protector addition for 75-Ohm Coax cable
protection.
Additionally, we offer a full line of Station Protectors,
ADSL and VDSL splitters with binding post or IDC
terminations and totally integrated protectorsubscriber bridge modules in a snap-in
configuration. Our 23xx series Station Protectors are
offered with GDT, MSP® or Solid State technology.
The 36xx series POTS splitters are designed to meet
all relevant ANSI specifications and all our protector
products and accessories are UL listed and
manufactured to RUS and Telcordia technical
requirements.
Residential Network Interface Devices
Commercial Multipair Network Interface Devices
NID Protector Terminals
NID Enclosures
66
Bourns® OSP Products – Continued
DigiGuard™ MSP® Broadband Protectors –
Balanced Capacitance (BC) versions available for VDSL
Standard Station Protectors
5-Pin Broadband Protectors
DSL Splitters – ADSL (left) and VDSL (right)
Well Protectors
5-Pin Broadband Protectors
67
Outside Plant – Signaling Systems Surge Protectors
Bourns® 1669 protectors are designed to protect
field-mounted 4-20 mA transmitters. The 1669 series
features a sealed stainless steel pipe for easy
connection to a field transmitter 1/2 inch NPT port.
A railmounted 1820-28-Ax is typically used to
protect the Digital Carrier System equipment at the
opposite end of the loop.
1669 Series – Transient Protector Selection Guide
Model
1669-01
1669-05
1669-02
1669-06
Max.
Signal
Voltage
30
DC Clamping
Voltage
L/L
(V)
Capacitance
1 MHz, Max.
L/G
(V)
L/L
(pF)
L/G
(pF)
250
1200
40
36
Series
Resistance
per Line
(Ω)
2000
1
1
50
2000
1669-06 Product Dimensions
68
1 kA
10/100 µs
(times)
20
1000
1669-02 Product Dimensions
3/4-14 NPT,
2 PLCS.
115.00
(4.53)
DIMENSIONS =
20 kA
8/20 µs
(times)
70
3/4-14 NPT
300 TYP.
(11.81)
Surge Life
750
22
36
Impulse Clamping
Inductance
DC
1 kA (L+L)–G
per Line,
Leakage
Max.
V DC, Max. 10/1000 500 V/µs
µs
L/G
(µH)
(µA)
L/L (V)
(V)
MILLIMETERS
(INCHES)
100.00
(3.94)
300 TYP.
(11.81)
1800 Series – Signal and Dataline Protector Selection Guide
Interface Operating
Characteristics
Mounting
Detail
Typical
App.
Peak Signal
Voltage
L/L (V) L/G (V)
1810-10-xx
Protective Characteristics
Peak Clamping Voltages
Max.
Data
Rate
(MHz)
@ 5 kA, 8 x 20 µs
rate of rise
@ 1 kA, 8 x 20 µs
rate of rise
L/L (V)
L/G (V)
L/L (V)
L/G (V)
Max. DC
Current
(mA)
Series
Resistance
Each Line
Typical
Capacitance
(input to output)
L/L (pF) L/G (pF)
(Ohms)
20
10
10
50
25
42
21
220
1200
2200
10
10
10
4
25
25
21
21
220
3300
3300
10
1811-10-xx
20
10
50
60
30
52
26
350
45
45
10
1821-10-xx
10
10
50
30
30
26
26
350
65
65
10
1820-10-xx
RS-422
1810-15-xx
RS-232
30
15
8
70
35
56
28
180
750
1500
15
1820-15-xx
RS-485
15
15
3
35
35
28
28
180
2300
2300
15
1811-15-xx
30
15
45
80
40
64
32
300
45
45
15
1821-15-xx
15
15
45
40
40
64
32
300
65
65
15
1810-28-xx
56
28
9
110
55
90
45
150
600
1100
22
28
28
4
55
55
45
45
150
1800
1800
22
1811-28-xx
56
28
40
120
60
45
45
250
45
45
22
1821-28-xx
28
28
40
60
60
45
45
250
65
65
22
1810-50-xx
100
50
10
178
89
156
89
100
30
5000
51
1820-50-xx
50
50
4
89
89
45
45
100
800
800
51
1820-28-xx
4-20 mA
Surge Life:
> 100 operations 200 Amps, 10 x 1000 µsec
> 10 operations 10 kA, 8 x 20 µsec
1800 Series Signal/Data Attenuation at Maximum Data Rate: 3 db with 600 Ω Termination
Operating Temperature:
1669 Series -40 to +100 °C
1800 Series -40 to + 60 °C
1820-28-A1 Product Dimensions
1820-28-A3 Product Dimensions
LINE
L1 L3 L2
EQPT
E2 E3 E1
GND
1.91
(48.51)
.74
(18.80)
.125
(3.18)
.093
(2.36)
ALIGNMENT PIN
E3/L3 GROUNDING LINK
3.28
(83.31)
DIMENSIONS =
MILLIMETERS
(INCHES)
.375
(9.53)
8-32UNF-2A
.70
(17.80)
LG
FEED-THROUGH (E3/L3)
GROUNDING SCREW
MOUNTING/GROUNDING SCREW
1.14
(28.96)
1.93
(49.02)
DIN-1 RAIL
(TS-32/EN50035)
1.79
(45.47)
DIN-3 RAIL
(TS-35/EN50022)
69
Other Related Products & Capabilities
Bourns offers a wide range of Transformers suitable
for use in Telecom, LAN and Ethernet applications.
These devices are available in a range of surface
mount and through-hole packages as well as some
low profile devices for PCMCIA applications. A
summary of part numbers by application is below.
PT60001 – LAN 10Base-T, 10Base-5, 10Base-2
16
15
13
12
10
PT60006 – LAN 100Base-TX
4
9
3
1:1
2
7
6
TX
5
1
1
2
4
5
7
8
13
14
1:1
1
1:1
15
PT60007 – LAN 10Base-T/100Base-TX QUAD
20
10
11
RX
16
2
9
19
1:1
3
18
PT60003 – LAN 10Base-T/100Base-TX PCMCIA
5
4
16
17
1:1
6
7
14
1:1
8
14
15
2
TX
1:1
1
13
12
3
10
9
11
12
5
RX
PT60005 – LAN 10Base-T/100Base-TX
1:1
1
3
15
1:1
11
TX
70
10
9
8
7
6
2
1:1
7
6
5
RX
13
14
12
16
10
PT60010 – LAN 100Base-TX QUAD
PT60011 – LAN 10-100Base-TX QUAD
1
37
RD+ 1
40 RX+
2
36
RD- 2
39 RX-
4
40
CT1 3
TD+ 4
38 CT1
37 TX+
TD- 5
36 TX-
TD- 6
35 TX-
TD+ 7
CT2 8
34 TX+
33 CT2
32 RX-
3
5
39
38
6
35
8
34
33
32
7
9
10
31
11
27
12
26
14
30
RD- 9
13
RD+ 10
31 RX+
RD+ 11
30 RX+
RD- 12
29 RX-
CT3 13
TD+ 14
28 CT3
27 TX+
15
29
28
TD- 15
16
25
TD- 16
17
24
23
TD+ 17
CT4 18
24 TX+
23 CT4
19
22
RD- 19
22 RX-
20
21
RD+ 20
21 RX+
26 TX-
1:1
25 TX-
18
PT61005 – LAN 10Base-T Filter Interface
PT60014 – LAN 10Base-T/100Base-TX PCMCIA
TRANSMIT
1
LOW PASS
FILTER
1:1
RECEIVE
1
1:1
16
8
14
5
3
LOW PASS
FILTER
16
LOW PASS
FILTER
6
1:1
2
15
3
11
7
10
9
6
12
8
14
LOW PASS
FILTER
1:1
TRANSMIT
9
11
RECIEVE
71
PT61007 – LAN 10Base-T/100Base-TX QUAD
1:1
TD1 + 1
TCT1
TD1 -
PT61003 – LAN 10Base-T/100Base-TX High Speed
40 TX1 +
2
39 TCT1
3
38 TX1 1:1
RD1 + 4
1:1
1
RX
7
5
37 RX1 +
6
2
3
RD1-
36 RX1 -
5
1:1
TD2 + 6
35 TX2 +
TCT2
7
34 TCT2
TD2 -
8
33 TX2 1:1
RD2 + 9
1:1
TX 14
15
32 RX2 +
31 RX2 -
RD2 - 10
TD3 + 11
10
16
30 TX3 +
12
PT61010 – LAN 10Base-T
RECEIVE
29 TCT3
TCT3 12
11
1:1
Pri
1
Sec
16
28 TX3 -
TD3 - 13
1:1
RD3 + 14
RD3 - 15
1:1
TD4 + 16
27 RX3 +
2
26 RX3 -
3
15
14
25 TX4 +
13
6
TCT4 17
24 TCT4
TD4 - 18
23 TX4 1:1
RD4 + 19
11
10
7
22 RX4 +
9
8
12
Pri
TRANSMIT
21 RX4 -
RD4 - 20
Sec
PT61004 – LAN 10Base-T Filter Interface
PT66001 – ISDN S-Interface Transformer Module
core 1
9
2
III
I
IV
II
8
7
3
17
core 2
4
III
16
IV
n = 2/2:1/1
1
LOW PASS
FILTER
15
8
100 Ω
5
VII
4
LOW PASS
FILTER
16
LOW PASS
FILTER
6
5
VIII
II
1:1
18
7
I
11
12
1
VI
n = 2/2:1/1
10
V
TRANSMIT
1:1
9
14
core 3
n = 1:1:1:1
100 Ω
12
14
LOW PASS
FILTER
11
10
RECIEVE
72
PT66002 – T1 Transformer
PT66004 – ISDN S-Interface Transformer
Sec
1
Pri
Pri
12
Sec
6
1
I
2
II
III
III
II
3
5
10
Pri
4
I
3
Sec
4
9
V
III (CT) 5
8
PT66005 – T1/CEPT/ISDN-PRI Transformer
IV
6
7
Pri
PT66003 – T1/CEPT Transformer
Pri
Sec
1:1
1
I
5
II
Sec
1
5
2
6
I
2
3
III
PT534-1 (1:1) – ADSL Line Transformer
II
4
6
SM76299 – SHDSL Line Transformer
1
4
9
2
7
5
Line
Chip
1
10
3
8
2
9
4
7
SM-LP-5001 – Series SM Line Matching Transformer
SM535-1 – ADSL Line Transformer
Chip
1
6
2
5
3
4
Line
10
1
7
4
1 : 1.95
73
Bourns® Microelectronic Modules Packaging Solutions
Device Mounting Technology
Surface Mount Technology
Surface mounting is still the most common and
economical approach for many applications. Bourns®
Microelectronic Module products offer the latest in
surface mount technology:
• Chip sizes to 0201
• Inert reflow
• SOIC, PLCC, TSOP, QFP to 0.012 ˝ (0.3 mm)
• Lead free solder capability
• CSP, odd form components
• Passive component test
• BGA: 0.5 mm pitch, underfill
Chip & Wire/COB (Chip on Board)
This proven technology provides an intermediate
level of miniaturization, the advantages of in-process
test and repair and is designed to withstand harsh
environments such as automotive applications.
Bourns® Microelectronic Module products offer the
latest in chip & wire technology:
• Gold & Aluminum Wire Bonding – High speed,
automated, ball/wedge, wedge/wedge, ribbon
• Gold Wire Bonding – 20-50 µm (0.8 to 2 mil)
wire to 100 µm (4 mil) pitch
• Aluminum Wedge Bonding – 125-380 µm
(5 to 15 mil) wire for high current/power
applications
• Die Attachment – Epoxy or Eutectic, 5 µm accuracy,
glob top, dam & fill
Anisotropic Adhesive Attachment
(Z-axis conductive epoxy)
• Ideal for PCB and flex circuits
• High I/O
• Tight pitch
• Cost-effective flip chip solution
• Utilizes off-the-shelf wire bondable ICs
IC
Any Substrate
Thermal-Sonic Bonding (Gold-to-Gold Interconnect)
• Ideal for high frequency applications and MEMs to
ceramic substrates
• I/O limited to ~32 or less
• Underfill optional
• Low temp process
• Lead free
IC
Bourns® Microelectronic Module products offer a
choice of flip chip approaches:
Stud Bump bonding
• Ideal for high I/O flip chip to ceramic substrate
• Mid-process replacement of faulty chips
• Underfill required
• Proven technology with reliability data
• Utilizes off-the-shelf wire bondable ICs
IC
Gold Bump (stud bump)
Conductive Adhesive
Underfill
Solder Mounting
• Standard flip chip technology
• Solder bumped devices
• Optional underfill
• Z-axis control for ultimate strength
• High volume cost-effective solution
IC
Any Substrate
74
Gold Bump (stud bump)
Underfill (optional)
Ceramic Substrate
Ceramic Substrate
Flip Chip Mounting
This process provides the ultimate opportunity for
package miniaturization and minimization of
conductor lengths and size reduction in high speed,
high frequency applications.
Gold Bump
Anisotropic Conductive Epoxy
Conductive Particles
Gold Bump (stud bump)
Conductive Adhesive
Underfill (optional)
Full Process for Stud Bump Bonding
Au Bumps
Press
IC
IC
Bump
Formation
Leveling
Height
IC
IC
IC
Underfill
Substrate
Transfer of
Conductive
Adhesive
Substrate
Mounting
& Curing
Inspection
Sealing
& Curing
Choice of Package Interconnects
• CSP (Chip Scale Packaging) – smallest package for
surface mounting
• MCM (Multichip modules) – smallest package for
multichip hybrid
IC
IC
Substrate
• SIP (Single Inline Packaging) – 0.050 ˝, 0.100 ˝ and
1.8 mm
• DIP (Dual Inline Packaging) – 0.100 ˝
• BGA (Ball Grid Array)
• QFP (Quad Flat Pack)
• J-Leads in Dual or Quad configuration –
0.050 ˝, 0.075 ˝ and 0.100 ˝
IC
IC
Substrate
• Mini-DIL
• TO-cans
• Butterfly
• Hermetic Seal
75
Bourns® Switch Power DC/DC Converters
Bourns Switch Power has brought innovative
product solutions and ideas to the power conversion
market since 1995. Our emphasis on high
performance converters has given us a broad and
expanding selection of power solutions. Our focus
on the communications market gives us the
advantage of experience when developing high
reliability products. Our technological innovation
has produced patents covering all aspects of DC-DC
Converter development: from controller IC design
through power train layout, resulting in better
performance, higher density and higher reliability
products.
Non-Isolated Converters
Bourns® Switch Power's Non-Isolated Converters
provide the low voltages needed to support core
logic, ASICs, microcontrollers and microprocessors.
These high-efficiency converters provide improved
regulation and superior dynamic response. In many
cases this is thanks to Bourns Switch Power’s
patented V2TM architecture. High power density in
both SIP and surface mount module packages ensure
compatibility with most size requirements.
Typical Applications for Point of Load
DC/DC Converters:
• Low voltage, high density systems with
Intermediate Bus Architectures (IBA)
• Workstations, servers, and desktop computers
• Distributed power architectures
• Telecommunications equipment
• Latest generation ICs (DSP, FPGA, ASIC) and
microprocessor-powered applications
• Data processing equipment
• Broadband, networking, optical and
communications systems
SLIC Power
The SLIC Power series of products provides highperformance power and low cost to Ringing SLIC
users. Rather than spending time designing and
testing specialized power circuits, the designer can
simply select the appropriate SLIC Power module.
Whether comparing cost, space or design time, the
SLIC Power modules can meet or exceed other
options.
Input Voltages: 3.3 V, 5 V, 12 V
Output Currents: 2 A to 32 A
Output Voltages: 0.8 V to 5.0 V
76
VBAT1/2
Input
Voltage
-72 V / -24 V
-63 V / -24 V
-60 V / -24 V
5.0 V
SPT5504C
SPT5504CL
SPT5504Q
12 V
SPT5204Q
SPT5204QL
—
48 Volt Power
Custom Power
Our M20W power module is an industrial
temperature range, dual-output device. The system
designer obtains flexibility in choosing 5 V and 3.3 V
components, based on the ability of the module to
supply either voltage over a wide power range to the
load. The output voltages are tightly and
independently regulated, thus eliminating the
common problem of cross regulation errors between
the outputs. The module is designed with Switch
Power’s resonant primary and synchronous
secondary topology for enhanced reliability and high
efficiency, allowing high-temperature operation.
Bourns can design and produce Custom Power
solutions for your specific application. The standard
fixed product is available in output voltages not
specified in this catalog. Please contact application
support for more information.
77
Which Protection Technology is Right for the Equipment?
There are several individual technologies within each
of the core protection types listed in Table 1. No
single protection technology offers an ideal solution
for all requirements. Each technology has different
strengths and weaknesses, and only by
understanding their relative merits can protection be
optimized for a given installation. A quick review of
Table 2 demonstrates that no single ideal solution
exists for all locations within the telephone network
so cascaded protection is often deployed.
Protection Type
Action
Connection
Overcurrent
Limit peak current
Series (or parallel
for primary)
Overvoltage
Limit peak voltage
Parallel
Overcurrent and
Overvoltage
Coordinate voltage
and current
protection
Combination
Table 1. Protection falls into three basic types
Overvoltage
Protection devices fall into two key types, overvoltage
and overcurrent. Overvoltage devices (see Figure 1)
divert surge current (such as lightning), while most
overcurrent devices (see Figures 2a-2c) increase in
resistance to limit the surge current flowing from
longer duration surge currents (50/60 Hz power
fault). There are two types of voltage limiting
protectors: switching devices (GDT and Thyristor)
that crowbar the line and clamping devices (MOV
and TVS). The inset waveforms of Figure 1
emphasize that switching devices results in lower
stress levels than clamping devices (shaded area) for
protected equipment during their operation.
Functionally, all voltage protectors reset after the
surge, while current protectors may or may not,
based on their technology. For example, PTC
thermistors are resettable; fuses are non-resettable as
shown in Table 3.
Overvoltage limiting - clamping and switching
Current Rating
GDT
Fair
Fair
Very high
Thyristor
Fair
Good
High
MOV
Fair
Poor
High
TVS
Very fast
Good
Very low
Source
Impedance
Surge Current
Surge
Overvoltage
O N LY
Protected Load
Accuracy
Overvoltage
Protection
Speed
Clamping
Overvoltage
Protection
Threshold Voltage
Switching
Overvoltage
Protection
Source and load voltages
Overcurrent
Speed
Accuracy
Current Rating
Polymer PTC
Thermistor
Fair
Good
Low
Ceramic PTC
Thyristor
Slow
Good
Low
Fuse
Very slow
Fair
Medium/High
Heat Coil
Very slow
Poor
Low
Thermal
Switch
Very slow
Poor
High
Table 2. Summary of technology characteristics
Good protection design necessitates an
understanding of the performance trade-offs and
benefits of each device type, as well as the
terminology used in their specifications. Adequate
grounding and bonding, to reduce potential
differences and provide a low impedance current
path is a prerequisite for coordinated system
protection (GR-1089-CORE, Section 9).
78
The Basics – Overvoltage and Overcurrent
Figure 1. Overvoltage protection provides a shunt path for surges
Overvoltage
Overcurrent limiting - interrupting
Surge
Action
Overcurrent
Protection
Surge Current
Interrupting
Connection
Examples
Interrupting
Voltage switching
Shunt
GDT, Thyristor
Voltage clamping
Shunt
MOV, TVS
DO NOT
ENTER
Protected Load
Source
Impedance
Overcurrent
Overcurrent
Action
Overcurrent limiting - reducing
Surge
Overcurrent
Protection
Surge Current
Reducing
AHEAD
Examples
Resettable
Series
PTC thermistor
– Ceramic
– Polymer
Non-resettable
Series
Fuse
Non-resettable
Shunt or series
Heat coil
Non-resettable
Series
LFR (Line Feed
Resistor)
Non-resettable
Across voltage
limiter
Fail-short device for
thermal overload
Reducing
REDUCED
CURRENT
Protected Load
Source
Impedance
Connection
Overcurrent
Table 3. The basic classes of protection devices
Overcurrent limiting - diverting
Surge
Surge Current
Diverting
Diverting
Overcurrent
Protection
O N LY
Protected Load
Source
Impedance
Overcurrent
Figure 2a-2c. Overcurrent protection isolates the equipment by
presenting a high impedance
A shunt device failing open circuit effectively offers
no follow-on protection, although under normal
conditions the telephone line will operate. If the
device fails to a short circuit, the line is out of
service, but further damage is prevented. In addition,
other issues such as exposed areas prone to heavy
surge events or remote installations where
maintenance access is difficult may strongly
influence selection of the most suitable protection
technology (see Table 4).
What Happens After a Surge or if the Device Fails?
In addition to preventing a surge from destroying
equipment, resettable devices return the equipment
to pre-event operation, eliminating maintenance cost
and maximizing communications service. In
addition, lightning typically consists of multiple
strikes. It is, therefore, essential to consider
subsequent surges. Because lightning and power
cross standards are not intended to represent the
maximum surge amplitudes in the field, an
understanding of what happens under extreme
conditions is equally important.
Reliability Tip
Complying with standards does not guarantee
field reliability.
79
Overvoltage
GDT
P or S
GDT + Thermal Switch
P
Thyristor
P or S
After Excess Stress3
Normal Operation
Suitable for Primary (P)
or Secondary (S)1,2
After Operation
Still Protecting?
Line Operating?
Yes/No
No/Yes
Yes
No
Yes
No
Reset to Normal
Thyristor + Thermal Switch
P
Yes
No
MOV
S
No
Yes
TVS
S
Yes
No
Overcurrent
Normal
Operation
After
Operation
PTC Thermistor
Reset to
Normal
Fuse
Line
Disconnected
Heat Coil
Line Shorted
or Open
Thermal Switch
LFR
1
2
3
Speed and Accuracy are Major Control Factors in
Determining Equipment Stress Levels
After Excess Stress3
Still
Protecting?
Line
Operating?
Yes
No
The behavior of each technology during fast surge
events can have a substantial effect on maximum stress
as summarized in Table 5a and 5b. In addition to device
tolerance, each device requires a finite time to operate,
during which the equipment is still subjected to the
unlimited surge waveform. Before operation, some
technologies allow significant overshoot above the
‘operating’ level. The worst-case effects determine the
stress seen by the equipment and not just the nominal
“protection” voltage or current (see Figure 3).
Line Shorted
Both Lines
Disconnected
Overvoltage protection technologies may be
summarized as follows:
• GDTs offer the best AC power and high surge
current capability. For high data rate systems
(>30 Mbs), the low capacitance makes GDTs the
preferred choice.
• Thyristors provide better impulse protection, but at a
lower current.
• MOVs are low cost components.
• TVS offers better performance in low dissipation
applications.
Primary protection applications typically require
specific fail-short protection.
Secondary protection requires a fused line (USA).
The failure mode depends on the extent of the excess stress.
Comments made for a typical condition that does not fuse
leads.
Table 4. The status after the protection has operated can be a
significant maintenance/quality of service issue
Overvoltage Limiters
Class
Type
Switching
Gas Discharge Tube
Clamping
Technology
Metal-Oxide Varistor
Performance
Voltage
Limiting
Speed
Voltage
Precision
BEST
Thyristor
TVS
BEST
BEST
Table 5a. No overvoltage technology offers an ideal solution for all applications
80
Impulse
Current
Capability
Low
Capacitance
BEST
Overcurrent Limiters
Diverting
Interrupting
Reducing
Class
Type
Technology
Polymer PTC Thermistor
Performance
Fast
Operation
Resistance
Stability
Low
Operating
Current
BEST
BEST
Ceramic PTC Thermistor
BEST
Fuse
BEST
Line Feed Resistor
BEST
BEST
Heat Coil
Thermal Switch
Low
Series
Resistance
BEST
BEST
BEST
Table 5b. No overcurrent technology offers an ideal solution for all applications
Technology Selection - Overvoltage Protectors
Voltage limiting devices reduce voltages that exceed
the protector threshold voltage level. The two basic
types of surge protective devices are clamping and
switching, Figure 8. Clamping type protectors have a
continuous voltage-current characteristic (MOV and
TVS), while the voltage-current characteristic of the
switching type protector is discontinuous (GDT and
Thyristor). A series or shunt combination of
clamping and switching type devices may provide a
better solution than a single technology. Utilize the
decision trees in Figures 4-7 to aid in the election of a
suitable circuit protection solution. Comparative
performance indicators and individual device
descriptions beneath each decision tree allow
designers to evaluate the relative merits for each
individual or combination of technologies. The lower
density and increased exposure of rural sites suggests
that heavier surges can be expected for these
Voltage impulse
Device operating delay - Voltage effect
depends on impulse rate of rise
Maximum Overshoot
Voltage
Overcurrent protection technologies may be
summarized as follows:
• PTC thermistors provide self-resetting protection.
• Fuses provide good overload capability and low
resistance.
• Heat coils protect against lower level ‘sneak
currents’.
• LFRs provide the most fundamental level of
protection, combined with the precision resistance
values needed for balanced lines and are often
combined with other devices.
Maximum AC
protection voltage
Difference between
typical and impulse
voltage
Typical AC protection
voltage
Figure 3. Systems must survive more than the nominal protection
voltage
applications (Figure 4), while the cost and type of the
protected equipment has an influence on the
selection of secondary protection (Figure 5, 6, & 7).
Reliability Tip
Check worst-case protection values, not just
nominal figures.
During the operation of overvoltage protectors, surge
currents can be very high and PCB tracks and system
grounding regimes must be properly dimensioned.
It is important that protectors do not interfere with
normal operation. Although traditional telecom
systems typically run at –48 V battery voltage plus
100 V rms ringing voltage (i.e. approximately 200 V
peak), designers should consider worst-case battery
voltage, device temperature and power induction
81
Uncontrolled
environment?
No
Yes
Solution?
Thyristor
Hybrid?
TVS
Thyristor
Diode
Thyristor
GDT
No
CLAMP?
MOV
GDT +
TVS
GDT +
MOV
CLAMP?
TVS
GDT +
MOV
GDT
GDT +
TVS
Lower impulse voltage
Lower capacitance
Lower capacitance
Long impulse life
Lowest
Impulse
Voltage
Yes
MOV
Lower impulse voltage
Lower capacitance
Hybrid?
Long impulse life
Highest Intrinsic Impulse Capability
Note: The overvoltage protector may require the addition of AC overcurrent protection.
Figure 4. Primary overvoltage technology selection
Reliability Tip
Ensure that PCB tracks and wiring are dimensioned
for surge currents.
voltages when specifying minimum protection
voltage. Some digital services operate at much higher
span voltages, requiring further consideration for
equipment designed for broadband applications (see
Table 2). The capacitance of overvoltage protectors
connected across these lines is important - especially
for digital connections such as ISDN and xDSL.
Matched and stable devices are necessary to avoid
introducing imbalance in the system.
Passive
Resistor
Component type?
Solution?
Solution?
Protection
Thyristor
Protection
GDT
Smaller
Component
Protection
Increased
rating
Thyristor
Inductive
Lower cost
What component
type is being
protected?
See Figure 6
Protection
See Figure 7
Thyristor
Figure 5. Secondary overvoltage protection depends on the type of
component to be protected
Datasheet Tip
When protecting digital lines, check the tolerance
and variation of protection capacitance (i.e. voltage
dependance), not just nominal values.
82
Protection
TVS
Component
Increased
rating
GDT
Smaller
Transformer
Class?
Solution?
Passive
Protection
Lower cost
Inductor
Active/
Semiconductor
Capacitor
Solution?
Component
Protection
Increased
rating
Thyristor
Protection
GDT
Component
Increased
rating
Note: The overvoltage protector may require the addition of AC
overcurrent protection.
Figure 6. Secondary protection of passive components
Gas Discharge Tubes (GDTs)
GDTs apply a short circuit under
surge conditions, returning to a high
impedance state after the surge.
These robust devices with negligible
capacitance are attractive for
protecting digital lines. GDTs are
able to handle significant currents,
but their internal design can
significantly affect their operating
life under large surges (see Figure 9).
Active/
Semiconductor
Thyristor
SLIC
Component type?
PSU
Solution?
Xpoint Switch
LCAS, SSR
Solution?
Diode
Bridge
Hybrid
Thyristor
Thyristor
TVS
MOV
AC Capability
AC Capability AC Capability
The sparkover voltage of GDTs
increases at high rates of voltage rise
Protection level
Protection level
(dv/dt). The level of increase
Xpoint Switch: Cross-point Switch
Lower cost
depends on the actual rate of rise
LCAS: Line Card Access Switch
PSU: Power Supply Unit
and the nominal DC sparkover
SSR: Solid State Relay
voltage. For example at 100 V/µs, the
SLIC: Subscribe Line Interface Circuit
impulse sparkover voltage of a 75 V GDT increases
Note: The overvoltage protector may require the addition of AC
to approx. 250 V and the impulse sparkover of a
overcurrent protection, such as a LFM, PTC thermistor or fuse.
350 V GDT increases to approximately 600 V.
Figure 7. Secondary protection of active components
Their ability to handle very high surge currents for
hundreds of microseconds and high AC for many
seconds matches the primary protection needs of
exposed and remote sites. During prolonged AC
events, GDTs can develop very high temperatures,
and should be combined with a thermal overload
switch that mechanically shorts the line (SwitchGrade Fail-Short mechanism).
Bourns® Products
Gas Discharge Tubes
Bourns offers the subminiature 3-electrode
Mini-TRIGARD® GDT and the 2-electrode Mini-GDT.
Combining small size with the industry’s best
impulse life, these products are ideal for high-density
primary applications.
100
MOV
A
TVS
10
Clamping
GDT
1
Current
Switching
GDT
Thyristor
100
mA
Datasheet Tip
GDTs are available with
Switch-Grade Fail-Short
Device.
10
Thyristor
1
0
100
GDT
200
300
Voltage - V
400
500
Standards Tip
UL Recognized GDTs are
now available,
requiring no BUG.
Figure 8. Overvoltage protectors feature very different V/I characteristics
83
450
GDT DC Sparkover Voltage Variation over Impulse Life
(350 V GDTs)
400
DC Sparkover Voltage @ 100 V/s
350
300
Bourns
Supplier A
Supplier B
Supplier C
Supplier D
250
200
150
100
50
0
50
100
150
200
250
300
Number of 500 A, 10/1000 impulses
350
400
Figure 9. GDT behavior may deteriorate under real-world field conditions
Certain GDTs can suffer
Surge
Power
Current
Cross
from venting or gas loss.
To ensure protection
Several kA
Several amps
under these circumfor 100 µs
for seconds
stances, an air Back Up
Gap (BUG) has been
used. BUGs themselves
can be subject to
moisture ingress or
contamination, reducing
their operating voltage, and leading to nuisance
tripping. BUGs are also more sensitive to fast rising
voltage surges, causing the BUG to operate instead of
the GDT. All Bourns® GDTs are now UL approved
for use without the need of a BUG, eliminating extra
cost and improving reliability (see Figure 10).
GDT Selected
No
GDT UL
Recognized
GDT +
BUG
Yes
GDT
Reliability
GDTs approved to UL497 optional test program for use without
a back-up device are no longer required to use a BUG
Figure 10. Traditional GDT venting has required back-up protection
84
dv/dt
Sensitivity
di/dt
Sensitivity
Typical Application
Poor
None
Primary and secondary
protection
Exposed sites
Sensitive equipment needs
additional secondary
protection
Particularly suited to high
speed digital lines
GDT protection capabilities
Thyristor-Based Devices
Thyristor-based devices initially clamp the line
voltage, then switch to a low-voltage “On” state. After
the surge, when the current drops below the
“holding current,” the protector returns to its original
high impedance state. The main benefits of thyristor
protectors are lower voltage overshoot and an ability
to handle moderate currents without a wear-out
mechanism. The disadvantages of thyristor
protectors are higher capacitance, which is a
limitation in high-speed digital applications, and less
tolerance of excessive current. Thyristor protectors
can act either as secondary protection in conjunction
with GDTs, or as primary protection for more
controlled environments/ lower surge amplitudes.
For protection in both voltage polarities, either a
power diode or second thyristor may be integrated in
inverse parallel, creating
Surge
Power
Current
Cross
versatile protection
functions that may be
Several 100 A
Several amps
used singly or in various
for 100 µs
for seconds
combinations. The
clamping voltage level of
fixed voltage thyristors is
set during the
manufacturing process.
Gated thyristors have their protective level set by the
voltage applied to the gate terminal.
Metal Oxide Varistors (MOVs)
A Metal Oxide Varistor (variable resistor) is a voltage
dependent resistor whose current predominantly
increases exponentially with increasing voltage. In
clamping surges, the MOV absorbs a substantial
amount of the surge energy. With a high thermal
capacity, MOVs have high energy and current
capability in a relatively small size. MOVs are
Datasheet Tip
When selecting operating voltage, remember that
MOV residual voltage increases considerably at
higher current.
extremely fast and low cost, but have high capacitance,
a high, current-dependant clamping voltage, and are
susceptible to wear. Typical MOV applications include
general-purpose AC protection or low-cost analog
telecom equipment such as basic telephones. When
combined with a GDT, the speed of the MOV enables
it to clamp the initial overshoot while the GDT begins
to operate. Once the GDT fires, it limits the energy in
the MOV, reducing the size of MOV required. Devices
are available which integrate an MOV and GDT in a
single package to simplify assembly and save space.
Surge
Current
Power
Cross
Several kA Dissipation
for 100 µs
limited
dv/dt
Sensitivity
Typical
Application
Good
Secondary
protection
dv/dt
Sensitivity
di/dt
Sensitivity
Typical Application
Good
Poor
Primary or secondary
protection
Urban and some exposed
sites
Can protect sensitive
equipment
Thyristor protection capabilities
Bourns® Products
TISP® Thyristor Surge Protectors
The TISP® family of thyristor-based devices includes
an extensive range of single and multiple
configurations in unidirectional and bidirectional
formats, with fixed or gated operation.
Transient Voltage Suppressors
Transient Voltage Suppressor (TVS) diodes are
sometimes called Zeners, Avalanche or Breakdown
Diodes, and operate by rapidly moving from high
impedance to a non-linear resistance characteristic
that clamps surge voltages. TVS diodes provide a
fast-acting and well-controlled clamping voltage
which is much more precise than in an MOV, but
they exhibit high capacitance and low energy
capability, restricting the maximum surge current.
Typically used for low power applications, their wellcontrolled voltage clamp enables the selection of
protection voltages closer to the system voltage,
providing tighter protection.
Surge
Current
Power
Cross
dv/dt
Sensitivity
Typical
Application
Low
Poor
None
Secondary
protection
Can protect
sensitive
equipment
TVS protection capabilities
Can protect
non-sensitive
equipment
MOV protection capabilities
85
AC Overcurrent
Yes
Primary overvoltage
technology?
Thyristor
Solution?
Solder
melt
Mechanical
compression
Mechanical
switch*
GDT
No
Solution?
Use with
ADSL?
Solder
melt
Insulation
melt
Lower on resistance
High current impulse
Lower fire risk
Lower cost
*Switch-Grade Fail-Short
Note: Protection against sneak currents requires the additional
components
Figure 11. Selection of fail-short technology for Primary
overvoltage protection
Technology Selection - Overcurrent Protectors
Current limiting devices (See Figures 11, 12) provide
a slow response, and are primarily aimed at
protection from surges lasting hundreds of
milliseconds or more, including power induction or
contact with AC power. By combining a fixed
resistor in series with a resettable protector, an
optimum balance of nominal resistance and
operating time is obtained. The inherent resistance
of certain overcurrent protectors can also be useful
in coordination between primary and secondary
overvoltage protection.
Reliability Tip
Hybrid devices incorporating resistors
can improve performance.
Positive Temperature Coefficient (PTC) Thermistors
Yes
PTC thermistor
type?
Polymer
Ceramic
Straightthrough
Lower signal loss
Better line balance
Figure 12. Sneak current technology selection
time is a key issue for preserving line balance. PTCs
are commonly referred to as resettable fuses, and
since low-level current faults are very common,
automatically resettable protection can be
Reliability Tip
The stability of PTC thermistor resistance after
operation can be critical for line balance.
particularly important. There are two types of PTC
thermistors based on different underlying materials:
Polymer and Ceramic. Generally the device crosssectional area determines the surge current
capability, and the device thickness determines the
surge voltage capability.
Polymer PTC devices typically have a lower resistance
than ceramic and are stable with respect to voltage
and temperature. After experiencing a fault condition,
a change in initial resistance may occur. (Resistance is
measured one hour after the fault condition is
removed and the resulting change in resistance
compared to initial resistance is termed the R1 jump.)
Heat generated by current flowing in a PTC
thermistor causes a step function increase in
resistance towards an
Resistance Stability Change After
Nominal
(with V and
open circuit, gradually
Ohms
Surge
Temperature)
returning close to its
Polymer PTC
original value once the
0.01 - 20
Good
10 - 20 %
Thermistor
current drops below a
Ceramic PTC
10 - 50
R decreases with
Small
threshold value. The
Thermistor
temperature and
under impulse
stability of resistance
value after surges over
Table 6. The two types of PTC thermistors have important differences
86
No
No
Heat coil
Lower cost
Resettable
Sneak current
protection needed?
Typical
Application
CPE Equipment,
e.g. Modem
Balanced line, e.g.
Line Card SLIC
In balanced systems with a PTC thermistor in each
conductor, resistance change may degrade line
balance. Including additional series resistance such
as an LFR can reduce the effect of the R1 jump. In
addition, some PTC thermistors are available in
resistance bands to minimize R1 effects. Polymer
types are also commonly used singly to protect CPE
equipment.
Datasheet Tip
PTC thermistor and resistor hybrids can improve
speed and line balance.
Ceramic PTC devices do not exhibit an R1 jump,
and their higher resistance avoids the need for
installing an additional LFR. While this reduces
component count, the resistance does vary with
applied voltage.
Since this change can be substantial (e.g. a decrease
by a factor of about 3 at 1 kV), it is essential that any
secondary overvoltage protection be correctly rated
to handle the resulting surge current, which can be
three times larger than predicted by the nominal
resistance of the ceramic PTC. In a typical line card
application, line balance is critical.
Safety Tip
Fuses offer a simple way to remove long-term faults,
and potentially dangerous heat generation,
but I-t coordination with other protection is vital.
acting, fuses can play a major safety role in removing
longer term faults that would damage protection
circuitry, thus reducing the size and cost of other
protection elements. It is important to consider the It performance of the selected fuse, since even
multiples of the rated current may not cause a fuse to
rupture except after a significant delay. Coordination
of this fuse behavior with the I-t performance of
other protection is critical to ensuring that there is
no combination of current-level and duration for
which the protection is ineffective. By including
structures intended to rupture under excess current
conditions or separate components, it is also possible
to produce hybrid fusible resistors.
Bourns® Products
Telefuse™ Telecom Fuses
Bourns has recently launched the B1250T/B0500T
range of SMT power fault protection fuses.
Bourns® Products
Multifuse® Resettable Fuses
Bourns offers an extensive range of polymer PTC devices
in the Multifuse® resettable fuse product family,
providing resettable overcurrent protection solutions.
Fuses
A fuse heats up during surges, and once the
temperature of the element exceeds its melting point,
the normal low resistance is converted to an open
circuit. The low resistance of fuses is attractive for
xDSL applications, but their operation is relatively
imprecise and time-dependant. Once operated, they
do not reset. Fuses also require additional resistance
for primary coordination (see Application section).
Heat Coils
Heat coils are thermally activated mechanical devices
connected in series with the line being protected,
which divert current to ground. A series coil
operates a parallel shunt contact, typically by melting
a solder joint that is restraining a spring-loaded
contact. When a current generates enough heat to
melt the joint, the spring mechanically forces two
contacts together, short-circuiting the line. Heat coils
are ideal to protect against “sneak currents” that are
too small to be caught by other methods. Their high
inductance makes them unsuitable for digital lines. It
is also possible to construct current interrupting heat
coils which open the circuit as a result of
overcurrent.
Since overvoltage protection usually consists of
establishing a low impedance path across the
equipment input, overvoltage protection itself will
cause high currents to flow. Although relatively slow
87
Bourns® Products
LPM Line Protection Modules
Bourns offers Line Feed Resistors combining matched
resistor pairs plus thermal link fuses.
Line Feed Resistors
A Line Feed Resistor (LFR) is the most fundamental
form of current protection, normally fabricated as a
thick-film device on a ceramic substrate. With the
ability to withstand high voltage impulses without
breaking down, AC current interruption occurs when
the high temperature developed by the resistor causes
mechanical expansion stresses that result in the
ceramic breaking open.
Low current power induction may not break the LFR
open, creating long-term surface temperatures of more
than 300 °C. To avoid heat damage to the PCB and
adjacent components, maximum surface temperature
can be limited to about 250 °C by incorporating a
series thermal fuse link on the LFR. The link consists
of a solder alloy that melts when high temperatures
occur for periods of 10 seconds or more.
Along with the high precision needed for balanced
lines, LFRs have significant flexibility to integrate
additional resistors, multiple devices, or even different
protection technology within a single component. One
possible limitation is the need to dimension the LFR
to handle the resistive dissipation under surge
conditions. Along with combining multiple
noninductive thick-film resistors on a single substrate
to achieve matching to <1 %, a resistor can be
combined with other devices to optimize their
interaction with the overall protection design.
For example, a simple resistor is not ideal for
protecting a wire, but combining a low value resistor
with another overcurrent protector provides closer
protection and less dissipation than either device can
offer alone. Both functions can be integrated onto a
single thick-film component using fusible elements,
PTC thermistors, or thermal fuses. Similarly, more
complex hybrids are available, adding surface mount
components such as thyristor protectors, to produce
coordinated sub-systems.
Thermal Switches
These switches are thermally activated, non-resetting
mechanical devices mounted on a voltage-limiting
device (normally a GDT). There are three common
activation technologies: melting plastic insulator,
melting solder pellet or a disconnect device.
Melting occurs as a result of the temperature rise of
the voltage-limiting device’s thermal overload
condition when exposed to a continuous current
flow. When the switch operates, it shorts out the
voltage-limiting device, typically to ground,
conducting the surge current previously flowing
through the voltage limiting device.
A plastic-melting based switch consists of a spring
with a plastic insulator that separates the spring
contact from the metallic conductors of the voltage
limiting device. When the plastic melts, the spring
contacts both conductors and shorts out the voltage
limiting device.
A solder–pellet-melting based switch consists of a
spring mechanism that separates the line
conductor(s) from the ground conductor by a solder
pellet. In the event of a thermal overload condition,
the solder pellet melts and allows the spring contacts
to short the line and ground terminals of the voltagelimiting device.
A “Snap Action” switch typically uses a spring
assembly that is held in the open position by a
soldered standoff and will short out the voltage
limiting device when its switching temperature is
reached. When the soldered connection melts, the
switch is released and shorts out the line and ground
terminals of the voltage limited (Bourns US Patent
#6,327,129).
4B06
0205 B-540-1
25/21
Figure 15. Photo of hybrid
88
9
Protection
Modes
Protection
Modes
Protection
Modes
Protection
Modes
1
1
1
1
2
2
2
2
PA
PC
One Protector
One Mode
Pb Pc
PA
PB
Two Protectors
Two Modes
PC
PB
Pa
Three Protectors
Three Modes
Delta (∆) Connected
Three Protectors
Three Modes
Wye (Y) Connected
Figure 13. Matching the modes of protection to the application optimizes protection and cost
R1
Modes of Overvoltage Protection
Insufficient protection reduces reliability, while
excessive protection wastes money, making it vital to
match the required protection level to the equipment
or component being protected. One important aspect
is the “modes” of protection.
Figure 13 illustrates that, for two wire systems, a
single mode of operation protects against transverse
(differential/metallic) voltages, but for three wire
systems, the ground terminal provides opportunities
to protect against both transverse and longitudinal
(common-mode) surges. This offers a trade-off for
items such as modems, where the provision of
adequate insulation to ground for longitudinal
voltages enables simple single mode/single device
protection to be used.
Ground-referenced SLICs and LCAS ICs, however,
require three-mode protection. Figure 14 illustrates
how devices may be combined and coordinated to
offer three-mode protection. The three-terminal
GDT offers two modes of robust primary protection,
while two PTC devices provide decoupling and
coordination. The bidirectional thyristor provides the
third mode of precise secondary voltage protection.
Technology Selection - Integrated Solutions
As emphasized earlier, no single technology provides
ideal protection for all requirements. Combining
more than one technology can often provide an
attractive practical solution. Clearly the convenience
GDT1
+t
Th1
R2
+t
Wire to Ground
GDT
Inter-Wire
Thyristor
Figure 14. The modes of protection may be split between primary
and secondary devices,with PTC thermistors ensuring
coordination
of a single component/module combining multiple
devices saves space and assembly cost while
simplifying the design task (see Figure 15). In
addition, some integrated modules provide
performance and capabilities that cannot be achieved
with separate discrete devices. In the next sections,
multi-stage overvoltage protectors and a broader
combination of overvoltage and overcurrent
protection integrated line protection modules are
presented.
Multi-Stage Protectors
When considering overvoltage protection (see Figure
4), combining a GDT with either a TVS or MOV
clamping device can reduce the impulse voltage
stress seen by downstream components. Although
TVS devices are attractive, they often introduce too
much capacitance. Typically, a GDT/MOV
combination offers a better solution. Figure 16
illustrates the different behavior of GDTs,
GDT/MOV hybrids and thyristor overvoltage
protection for both 100 V/µs and 1000 V/µs impulse
89
waveforms. The GDT/MOV hybrid provides more
consistent protection than a simple GDT, irrespective
of the environment.
The best performance and lowest fire risk are
provided by the thermal switch or switch-grade failshort mechanism. GDT/MOV/fail-short overvoltage
protectors effectively replace three components,
providing maximum surge current capability from
the GDT, low transient clamping characteristics and
back up function from the MOV, and maximum
safety from the switch-grade fail-short device.
1000 V/µs
200
150
100 V/µs
100
70
50
40
30
1000 V/µs
20
15
10
50
100
150
200
250
300
350
400
450
500
Maximum System Voltage – V
(GDT – Minimum Sparkover)
(Thyristor VDRM)
Figure 16. Each protection technology behaves differently under
Impulse conditions
Overvoltage Protection
Overcurrent
Protection
SMT Fuse
2-point
LFR
3-point “V”
LFR +
Thermal Link Fuse
3-point Gated
+t
PTC Thermistor
3-point “Y”
Resistor Array
+t
LFR +
PTC Thermistor
3-point “Delta”
Resistor
Array
In addition to its superior clamping of fast rising
transients, the MOV of the GDT/MOV assembly
provides the function of a back up device without the
well-known negative side effects of BUGs. Figure 11
demonstrates that a thermally operated current
diverter is useful to protect the GDT from excessive
heat dissipation under prolonged power cross
conditions.
700
500
400
300
Overvoltage
Protection
GDT Gas Discharge Tubes
The Bourns® MSP® Multi-Stage Protector assembly
combines MOV responsiveness with GDT robustness.
Combined with our patented switch-grade fail-short
device, it provides the optimum broadband network
primary protection solution.
Normalized Impulse or Ramp Protection Voltage Increase – %
Bourns® Products
8 mm GDT
8 mm GDT Hybrid
Thyristor
1000
Overcurrent
Protection
The low capacitance of the GDT/MOV hybrid also
provides valuable characteristics for high frequency
applications, enabling the protection of a wide range
of copper-pair lines from POTS to VDSL and CAT5
100 Mb/s networks. All Bourns® GDT and
GDT/MOV hybrid families are UL Recognized for
use without a BUG, making them simple to use and
saving valuable space.
Impulse and Ramp % Voltage Increase
vs
Maximum System Voltage
SIP LPM
Integrated Line Protection Modules
Integrating multiple protection elements on a single
FR4 or ceramic substrate SIP reduces the PCB area
used and increases the number of lines that can be
fitted to each line card. Figure 17 outlines the key
technologies available for such integrated assemblies
90
Line 1 circuit
Line n circuit
Figure 17. Multiple technologies may be integrated into a single,
space-saving Line Protection Module
and introduces one new form of overcurrent
protection. Thermal fuse link uses the heat from the
LFR under continuous power induction to desolder a
series link, which interrupts the induced current,
avoiding thermal damage to the module, the line
card or surrounding components. They are not
practical as discrete devices because they use special
structures built into the substrate. These integrated
modules tend to be customized for each application,
rather than off-the-shelf components.
4B06B-540-125/219 LPM
for LCAS Protection
Although PTC thermistors may be used alone, series
connection with an LFR reduces peak currents and
thereby allows smaller cross-section PTC thermistors
to be used. The thermal coupling of an integrated
module also ensures that the LFR heating further
increases the rate of PTC thermistor temperature rise
during AC faults causing faster low current tripping.
The series LFR resistance will reduce the impulse
current increase of ceramic thermistors and reduce
the relative trip resistance change of polymer types.
Figure 18. An example of an LPM
integrated LCAS
protection module
It is worth noting that 10 mm SMT micro fuses are
now available (e.g. Bourns® Telefuse™ fuse) with 600
V ratings to meet GR-1089-CORE, and UL 60950
safety requirements, and, dependent on the
application, these may be fitted in either one or both
signal lines. LFR technology can also be used to
fabricate precision high voltage resistors on the same
substrate for non-protection use, such as power ring
feed resistors and bridges for off-hook detection,
giving further cost and PCB space savings.
As seen in “Modes of overvoltage protection”, it is
important to match the protection topology
(typically thyristor based) to the equipment being
protected, with simple single-mode, 2-point
protection being suitable for Tip to Ring protection
applications such as modem coupling capacitor
protection. The two mode bidirectional 3-point “V”
is a common configuration, protecting components
connected between Tip or Ring and Ground, while
F1
R1
R2
F2
Th1
Th2
R1 = 10
R2 = 10
F1 = Thermal Link Fuse
F2 = Thermal Link Fuse
Th1 = TISP125H3BJ
Th2 = TISP219H3BJ
SLICs powered from
negative supplies need
only a uni-directional
3-point “V”. Threemode “Y” or “Delta” 3point protection is
used where protection
is needed both to
ground and interwire.
Figure 18 illustrates
an LCAS protection
module, with ±125 V
Tip protection, and
±219 V Ring protection in a 3-point “V”
configuration, complete with LFRs and thermal
link fuses.
As with discrete device solutions, gated thyristor
protectors can be used to significantly reduce voltage
stress for sensitive SLICs and current stress on
downstream protection circuits. Once again the
thermal coupling between a PTC thermistor and a
heating element is beneficial. Heat from the thyristor
speeds up thermistor tripping under power
induction conditions. Further, the thyristor longterm temperature rise is constrained to the trip
temperature of the thermistor, thereby limiting the
maximum protection voltage under low AC
conditions.
Each module can provide multiple circuits,
protecting 2, 4 or 6 lines with a single module. The
use of UL recognized components greatly eases both
consistency of performance and UL recognition of
the module. System-level design is simplified,
because individual component variations are handled
during the module design, enabling the module to be
considered as a network specified to withstand
defined stress levels at the input, while passing
known stresses to downstream components.
Bourns® Products
LPM Line Protection Modules
Bourns offers a variety of Line Protection Module (LPM)
products, including custom options.
91
Telecommunication Standards
and Recommendations Summary
Contents
1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .95
1.1 Test Circuits and Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .95
1.2 Hazard indicators and wiring simulators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .96
2 Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .97
2.1 Telcordia GR-1089-CORE, Issue 3, October 2002,
Electromagnetic Compatibility and Electrical Safety Generic Criteria for Network Telecommunications Equipment . . . . . . . . . . . . . . . . . . . . .97
2.2 Telcordia GR–3108–CORE, Issue 1 (in development),
Generic Requirements for Network Equipment in the Outside Plant (OSP)
Telcordia Technologies Generic Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .98
2.3 TIA-968-A-2002 with Addendums TIA-968-A-1 2003 and TIA-968-A-2 2004,
Telecommunications Telephone Terminal Equipment:
Technical Requirements for Connection of Terminal Equipment
to the Telephone Network (Formally known as “FCC Part 68”) . . . . . . . . . . . . . . . . . . . .98
2.4 UL 60950-1, April 2003,
Safety for Information Technology Equipment – Safety –
Part 1: General Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .98
2.5 UL 60950-21, November 2003,
Safety for Information Technology Equipment – Safety –
Part 21: Remote Power Feeding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .99
2.6 UL 1459, 1999, Standard for Telephone Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .99
2.7 UL 2444, (in development), Network Equipment Standard . . . . . . . . . . . . . . . . . . . . . . .99
2.8 ITU-T Recommendation K.20 (07-2003),
Resistibility of telecommunication equipment installed
in a telecommunications centre to overvoltages and overcurrents . . . . . . . . . . . . . . . . . . .99
2.9 ITU-T Recommendation K.21 (07-2003),
Resistibility of telecommunication equipment installed
in customer premises to overvoltages and overcurrents . . . . . . . . . . . . . . . . . . . . . . . . . . . .99
2.10 ITU-T Recommendation K.44 (07-2003),
Resistibility tests for telecommunication equipment
exposed to overvoltages and overcurrents – Basic Recommendation . . . . . . . . . . . . . . . . .99
2.11 ITU-T Recommendation K.45 (07-2003),
Resistibility of telecommunication equipment installed
in the access and trunk networks to overvoltages and overcurrents . . . . . . . . . . . . . . . .103
2.12 ITU-T Recommendation K.50 (02/2000),
Safe limits of operating voltages and currents
for telecommunication systems powered over the network . . . . . . . . . . . . . . . . . . . . . . . .103
2.13 ITU-T Recommendation K.51 (02/2000),
Safety criteria for telecommunication equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .103
M J Maytum, August 2004, rev 9
92
2.14 IEC 61000-4-5 (2001-04), Ed. 1.1,
Electromagnetic compatibility (EMC)- Part 4-5:
Testing and measurement techniques - Surge immunity test . . . . . . . . . . . . . . . . . . . . . .103
2.15 ETSI EN 300 386-1, (2003-05),
Electromagnetic compatibility and Radio spectrum Matters (ERM);
Telecommunication network equipment;
ElectroMagnetic Compatibility (EMC) requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . .103
2.16 ETSI EN 300 386-2, (1997-12),
Electromagnetic compatibility and Radio spectrum Matters (ERM);
Telecommunication network equipment;
ElectroMagnetic Compatibility (EMC) requirements; Part 2:
Product family standard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .103
3
Surge Protective Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .103
3.1 GR-1361, Issue 2, September 1998,
Generic Requirements for Gas Tube Protector Units (GTPUS) . . . . . . . . . . . . . . . . . . . .103
3.2 GR-974-CORE, Issue 3,
Generic Requirements for Telecommunications Line Protector Units (TLPUs) . . . . . . .104
3.3 UL 497, Edition 7 (April 2001),
Standard for Protectors for Paired Conductor Communications Circuits . . . . . . . . . . . .104
3.4 UL 497A, Edition 3 (March 2001)
Standard for Secondary Protectors for Communications Circuits . . . . . . . . . . . . . . . . . .104
3.5 UL 497B, Edition 4 (June 2004)
Standard for Protectors for Data Communication and Fire Alarm Circuits . . . . . . . . .104
3.6 UL 497C Edition 2 (August 2001)
Standard for Protectors for Coaxial Communications Circuits . . . . . . . . . . . . . . . . . . . .104
3.7 IEEE Std C62.36-2000,
IEEE Standard Test Methods for Surge Protectors
Used in Low-Voltage Data, Communications, and Signalling Circuits . . . . . . . . . . . . . .104
3.8 IEEE Std C62.64-1997,
IEEE Standard Specifications for Surge Protectors
Used in Low-Voltage Data, Communications, and Signalling Circuits . . . . . . . . . . . . . .104
3.9 ITU-T Recommendation K.28 (03/1993),
Characteristics of semiconductor arrester assemblies
for the protection of telecommunications installations . . . . . . . . . . . . . . . . . . . . . . . . . . .104
3.10 IEC 61643-21 (2000-09),
Low voltage surge protective devices Part 21: Surge protective devices connected to telecommunications
and signalling networks - Performance requirements and testing methods . . . . . . . . . .104
3.11 ATIS T1.337-2004,
Requirements for Maximum Voltage, Current, and Power Levels
in Network-Powered Transport Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .104
3.12 ATIS T1.338-2004,
Electrical Coordination of Primary and Secondary
Surge Protective Devices for Use in Telecommunications Circuits . . . . . . . . . . . . . . . . . .105
93
4
94
Surge Protective Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .105
4.1 REA Bulletin 345-83,
Specification for Gas Tube Surge Arrestor, RUS PE-80 . . . . . . . . . . . . . . . . . . . . . . . . . . .105
4.2 ITU-T Recommendation K.12 (02/2000),
Characteristics of gas discharge tubes
for the protection of telecommunications installations . . . . . . . . . . . . . . . . . . . . . . . . . . .105
4.3 IEEE Std C62.3x
Series of Test Specifications For Surge Protective Components . . . . . . . . . . . . . . . . . . . . .105
4.3.1 IEEE Std C62.31-1987 (under revision),
IEEE Standard Test Specifications For Gas-Tube Surge-protective Devices . . . .105
4.3.2 IEEE Std C62.32-2004
IEEE standard test specifications for low-voltage air gap
surge-protective devices (excluding valve and expulsion type devices) . . . . . . . .105
4.3.3 IEEE Std C62.33-1982
IEEE standard test specifications for varistor surge-protective devices . . . . . . . .105
4.3.4 IEEE Std C62.35-1987
IEEE standard test specifications for avalanche junction
semiconductor surge protective devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .105
4.3.5 IEEE Std C62.37-1996
IEEE standard test specification for thyristor diode surge protective devices . . .105
4.4 IEC 61643-3x1
Series of test specifications for low-voltage surge protective components . . . . . . . . . .105
4.4.1 IEC 61643-311 (2001-10), Ed. 1.0,
Components for low voltage surge protective devices Part 311: Specification for gas discharge tubes (GDT) . . . . . . . . . . . . . . . . . . . . .105
4.4.2 IEC 61643-321 (2001-12) Ed. 1.0,
Components for low voltage surge protective devices Part 321: Specifications for avalanche breakdown diode (ABD) . . . . . . . . . . . .105
4.4.3 IEC 61643-331 (2003-05) Ed. 1.0,
Components for low voltage surge protective devices Part 331: Specification for metal oxide varistors (MOV) . . . . . . . . . . . . . . . . . . .105
4.4.4 IEC 61643-341 (2001-11) Ed. 1.0,
Components for low voltage surge protective devices Part 341: Specification for thyristor surge suppressors (TSS) . . . . . . . . . . . . . . .105
1 Introduction
1.1 Test Circuits and Levels
This document summarises the common
telecommunication protection device and equipment
standards. To minimise service loss and user safety
hazards, service providers and regulators mandate
that equipment and devices comply with specific
standards or recommendations. This section
summarises telecommunications component and
port surge tests in the North American documents
from Telcordia (GR), Underwriters Laboratories
(UL), Institute of Electrical and Electronics
Engineers (IEEE) and Telecommunications Industry
Association (TIA). International documents covered
come from the International Telecommunication
Union Telecommunication Standardization Sector
(ITU-T) and the International Electrotechnical
Commission (IEC). As international trade, travel and
communications increase, international standards
enable products to be sold and work worldwide.
Standards are constantly evolving, so it is important
to verify the material here against the latest copies of
the relevant documents. The European documents
covered are either EN versions of IEC standards or
from the European Telecommunications Standards
Institute (ETSI).
Lightning and power fault events can induce
longitudinal surges in the telecommunication line
and Figure 1 shows how longitudinal (port to
ground) surge testing is done. Depending on the test
intent additional items such as primary protection,
wiring simulation and the decoupling of other ports
may be added in these test circuits.
Asynchronous operation of upstream protection
grounds one line conductor and converts a
longitudinal surge into a transverse surge. Figure 2
shows the transverse (metallic or differential) surge
test circuit. The number of transverse test
configurations is the same as the number of wires. A
twisted-pair should have two tests, one applied to the
Ring conductor and the other applied to the Tip
conductor. However, if the circuit is symmetrical,
only one proving test needs be done.
When the ground has high resistance or is not
connected, the incoming surge enters the equipment
on one port and exits at another port – a port-toport surge. Figure 3 shows how port-to-port testing
is done.
Decoupling
Element
Coupling
Element
Primary
test protector
when required
R
EUT
Internal
port
External
port
Output
R
Test
Generator
Internal/
external
port
E
Powering/
auxilary
equipment or
terminations
Powering/
auxilary
equipment or
terminations
E
E
Return
Figure 1. Longitudinal surge test circuit
Decoupling
Element
Coupling
Element
Primary
test protector
when required
R
External
port
Output
R
Test
Generator
Unused
ports
EUT
Internal/
external
port
E
Powering/
auxilary
equipment or
terminations
E
Powering/
auxilary
equipment or
terminations
Powering/
auxilary
equipment or
terminations
E
The surge threats are higher for
the exposed external cables than
cables just internal to the
building. Figure 4 shows port
testing for shielded and
unshielded internal cables. GR1089-CORE excludes internal
port testing, if the shielded cable
is grounded at both ends.
The maximum test levels applied
are typically in three areas; basic withstand, a higher
(enhanced) level withstand for adverse environments
and an excessive level to investigate possible safety
hazards. Step testing is done at levels up to the
maximum specified to verify there are no blind spots
in the equipment performance. The equipment must
be functional after withstand testing (criterion A or
“first level”) and shall not create hazard from safety
testing (criterion B or “second level”).
E
Return
Figure 2. Transverse surge test circuit
95
Appropriate primary
test protector
when required
Decoupling
Element
Coupling
Element
Primary
test protector
when required
R
EUT
External
port
Output
R
Test
Generator
External
port
Internal/
external
port
E
Powering/
auxilary
equipment or
terminations
Powering/
auxilary
equipment or
terminations
Powering/
auxilary
equipment or
terminations
E
E
E
Return
Figure 3. Port to port surge test circuit
100
1.2 Hazard indicators and wiring simulators
10
Current – A rms
The condition of cheesecloth wrapped around the
item under test checks for potential user hazards.
After safety testing, hazards are indicated by
cheesecloth that is charred burnt or perforated (GR1089-CORE only). Wiring simulations in a test circuit
check that the equipment feed cable will overheated.
The equipment must interrupt or reduce the AC fault
current before the simulator operates or is judged to
overheat. Because of different cabling practices and
simulation options, there are more wiring simulator
options than standards that use them. Figure 5 shows
a selection of simulators; graphical, mathematical, fuse
(shown at 80 % of typical) and single wire, together
with their referenced standards.
MDQ 1 6/10 Fuse '1089/UL 1459
MDL 2 Fuse '1089/UL 60950
100A2s, 1.3 A DC UL 60950
Fig. 4-5 GR-1089-CORE
26 AWG GR-1089-CORE
Fig. 59.2 UL 1459
1
0.1
0.01
0.1
1
10
100
1000
Duration – s
Figure 5. Wiring simulators
2 Equipment
2.1 Telcordia GR-1089-CORE, Issue 3, October 2002
Electromagnetic Compatibility and Electrical Safety Generic Criteria for Network Telecommunications
Equipment
AC and lightning surge test circuits and performance
levels for the external and internal line ports of
network equipment. External port feed cable
overheating and primary-equipment coordination
tests are included. Test summaries for twisted-pair
cables are shown in tables one through three. Further
material on GR-1089-CORE, Issue 3 is in the article
“The New GR-1089-CORE” Compliance Engineering,
2003 Annual Reference Guide: pp 103-113.
Decoupling
Element
Coupling
Element
EUT
R
Unused
ports
EUT
Internal
port
Output
R
Test
Generator
E
Powering/
auxilary
equipment or
terminations
E
Return
R
Powering/
auxilary
equipment or
terminations
Test
Generator
Internal
ports
20 m shielded cable
E
E
Return
Internal line unshielded cable test circuit
Figure 4. Internal cable port test circuits
96
Output
Internal/
external
port
Internal line shielded cable test circuit
GR-1089CORE
Table #
4-23
Test #
Min. Peak
Open Circuit
Conductor
Voltage (V)
Min. Peak
Short-Circuit
Conductor
Current (A)
Waveshape
Repetitions
Each Polarity
1
600
100
<10/>1000
25
2
1000
100
<10/>360
25
31
1000
100
<10/>1000
25
4
2500
500
<2/>102
10
Longitudinal
5
Longitudinal
up to 12 pairs
Coordination
Second Level
Safety
55
1000
25
<10/>360
Test
Connection
4-3
1
400-2000
0-100
<10/>1000
10
4-43
1
5000
500
<2/>102
1
Longitudinal
1
800
100
<2/>102
1
Transverse
100
2
1
Longitudinal
4-56
<2/>10
Primary
First Level
Withstand
Longitudinal
& Transverse
1500
Port
Longitudinal
& Transverse
4
2
Test
Type
External
Removed
First Level
Withstand
Intrabuilding
Notes:
1. Test 3 replaces tests 1 and 2.
2. A 1.2/50, 8/20 combination waveshape of the same peak current (but increased duration) may be used as an alternative.
3. For equipment with voltage limiters, tests must also be done at a voltage level just below the limiter threshold.
4. Becomes an objective January 2005 and a requirement in January 2006. Besides GR-1089-CORE, Issue 3, further information on this test
is contained in “Electrical Coordination of Primary and Secondary Surge Protective Devices for Use in Telecommunications Circuits”
T1.333-2004 and “The New GR-1089-CORE” Compliance Engineering, 2003 Annual Reference Guide: pp 103-113.
5. Not applicable for single port equipment.
6. Not applied to ports with shielded cables that have the shield grounded at both ends.
Table 1. GR-1089-CORE impulse tests
GR-1089CORE
Table #1
4-6
2, 3
4-7
4-82, 4
Test #
Open-Circuit
Conductor
Voltage
(V rms)
Short-Circuit
Conductor
Current
(A rms)
Duration
(s)
Applications
12
50
0.33
900
1
22
100
0.17
900
1
32
200, 400 & 600
1 @ 600 V rms
1
60
4
1000
1
1
60
5
Inductively coup led test circuit
1089 Fig. 4-4
5
60
600
0.5
30
1
7
440
2.2
2
5
8
600
3
1.1
5
9
1000
5
0.4
5
1
120, 277
25
900
1
2
600
60
5
1
3
600
7
5
1
4
100-600
2.2 @ 600 V rms
900
1
900
1
Inductively coup led test circuit
1089 Fig. 4-4
Test
Type
Port
Longitudinal
& Transverse
Primary
Removed
Fitted
Longitudinal
6
5
Test
Connection
First Level
Withstand
External
Removed
Longitudinal
& Transverse
Longitudinal
Longitudinal
& Transverse
Fitted
Second Level
Safety
External
Removed
Longitudinal
Notes:
1. AC sources are 50 Hz or 60 Hz, sinusoidal.
2. For equipment with a voltage limiter or current limiter, tests must also be done at a level just below the limiter threshold.
3. For non-customer-premise equipment the wiring simulation used for all tests may be GR-1089-CORE Figure 4-5, an MDL 2 fuse or an
MDQ 1 6/10 fuse.
4. For customer-premise equipment the wiring simulation used for all tests may be GR-1089-CORE Figure 4-5, an MDL 2 fuse, an MDQ 1 6/10
fuse or a 26 AWG wire, if such wire or coarser is specified for installation.
Table 2. GR-1089-CORE AC power fault tests
97
GR-1089CORE
Clause #
Open-Circuit
Conductor
Voltage
(V rms)
Short-Circuit
Conductor Current
(A rms)
4.6.112
4.6.143
600
30, 25, 20, 12.5, 10, 7, 5,
3.75, 3, 2.6 & 2.2
4.6.174, 5
120
Duration
(s)
Applications
Test
Connection
Test Type
900
1
Longitudinal
& Transverse
Second Level
Safety
25
Port
Primary
External
Removed
Internal
N/A
Notes:
1. AC sources are 50 Hz or 60 Hz, sinusoidal.
2. For current-limiting protector tests of non-customer-premise equipment, the wiring simulation used may be GR-1089-CORE Figure 4-5,
and MDL fuse or an MDQ 1 6/10 fuse.
3. For fusing coordination tests of network equipment to be located at the customer premises, the wiring simulation used may be
GR-1089-CORE Figure 4-5, and MDL 2 fuse or a 26 AWG wire, if such wire or coarser is specified for installation.
4. Only for network equipment to be located at the customer premises.
5. For second-level intra-building port testing of customer premise equipment, the wiring simulation used may be GR-1089-CORE Figure 4-5,
an MDL 2 fuse or a MDQ 1 6/10 fuse.
Table 3. GR-1089-CORE AC current-limiter and fusing tests
Surge Type
Minimum Peak
Open-Circuit
Conductor Voltage
(V)
Voltage
Waveshape
Minimum Peak
Short-Circuit
Conductor Current
(A)
Current
Waveshape
Test
Connection
800
<10/>560
100
<10/>560
Transverse
1500
<10/>160
200
<10/>160
Longitudinal
1000
9/720
25
5/320
Transverse
1500
9/720
27.33
4/2453
Longitudinal
Port
A1
External
B
2
Notes:
1. Equipment may fail, but not in a Ring-Tip short-circuit mode.
2. Equipment must be operational after these withstand tests.
3. These values are for both Ring and Tip outputs grounded. T1-968-A quotes for only one conductor grounded, giving 37.5 A and 5/320.
Table 4. TIA-968-A-2002 Lightning surge tests
2.2 Telcordia GR–3108–CORE, Issue 1
(in development),
Generic Requirements for Network Equipment in
the Outside Plant (OSP) Telcordia Technologies
Generic Requirements
Defines OSP environmental performance
requirements which can be used during GR-1089CORE testing.
2.3 TIA-968-A-2002 with Addendums TIA-968-A-1
2003 and TIA-968-A-2 2004,
Telecommunications Telephone Terminal
Equipment: Technical Requirements for Connection
of Terminal Equipment to the Telephone Network
(Formally known as “FCC Part 68”)
Lightning surge test circuits and performance levels
for the external line ports of equipment installed at
the customer premise. Power fault and safety
98
requirements will come from UL 60950-1
compliance. Table 4 summaries the impulse test
conditions of this standard.
2.4 UL 60950-1, April 2003
Safety for Information Technology Equipment –
Safety – Part 1: General Requirements
AC and lightning surge test circuits and safety
performance for the external line ports of network
equipment. External port feed cable-overheating tests
are included. Table 6 summaries the AC power fault
tests and Figure 6 shows the overvoltage flow chart
for product approval.
UL 60950-1
Clause #1
Test #
Open-Circuit
Conductor
Voltage
(V rms)
Short-Circuit
Conductor
Current
(A rms)
Duration
(s)
M-1, L-1
and F1
600
40
1.5
M-2, L-2
and F2
600
7
5
M-3, L-3
and F3
600
2.2
1800
Test
Connection
600
<2.2
4
1800
M-4, L-4
and F4
<6005
<2.25
1800
L-5
120
25
1800
Port
Wiring
Simulation
Y3
Longitudinal
& Transverse
NAC.3.32
M-3A, L-3A
and F3A
Test
Type
Safety, No
Ignition or
Charring of the
Equipment
Cheesecloth
Indicator
External
Longitudinal
N
Y3
Notes:
1. AC sources are 50 Hz or 60 Hz, sinusoidal.
2. “M” tests are differential (metallic or transverse) mode tests. “L” tests are common (longitudinal) mode tests. “F” tests are 4-wire tests, one
pair is longitudinally tested and one port terminal of the other pair is grounded.
3. Used when a minimum 26 AWG telecommunications line cord is not provided or specified. Simulator may be a 50 mm length of 0.2 mm
(No. 32 AWG) solid copper wire or an MDL-2 fuse. For M-1, L-1 and F-4 an i2t measurement of less than 100 A2s can be used.
4. Test 3A is done when the current in test 3 is interrupted. The applied circuit current must be set to be just below the operating current
level of the equipment current limiter for the test duration.
5. Test 4A is done when the equipment voltage limiter, rated at 285 V peak or more, operated during tests 3 or 3A. The equipment voltage
and current levels are set at a level just below the voltage and current limiter threshold levels.
Table 6. UL 60950-1 AC power fault tests
2.5 UL 60950-21, November 2003
Safety for Information Technology Equipment –
Safety – Part 21: Remote Power Feeding
Sets the safety performance levels of remote voltage
(RFT-V) or current (RFT-C) power feeds to
equipment.
external and internal line ports of equipment
installed at telecommunications centres. Two surge
withstand levels are specified, basic and enhanced.
Primary-equipment coordination tests are included.
2.9 ITU-T Recommendation K.21 (07-2003)
Standard for Telephone Equipment
AC surge test circuits and safety performance for the
external line ports of equipment connected to the
network. External port feed cable-overheating tests
are included (NB maximum current levels are lower
than UL-60950-1).
Resistibility of telecommunication equipment
installed in customer premises to overvoltages and
overcurrents
AC and lightning surge performance levels for the
external and internal line ports of equipment
installed at the customer premise. Two surge
withstand levels are specified, basic and enhanced.
Primary-equipment coordination tests are included.
2.7 UL 2444, (in development)
2.10 ITU-T Recommendation K.44 (07-2003)
Network Equipment Standard
This is a safety-listing standard based on GR-1089CORE, UL 1459 and UL 60950-1.
Resistibility tests for telecommunication equipment
exposed to overvoltages and overcurrents—Basic
Recommendation
AC and lightning surge test circuits to be used for
K.20, K.21 and K.45 performance evaluations. Tables
7 through to 9 summarise the tests and levels for
paired conductor ports in K.20, K.21 and K.45.
2.6 UL 1459, 1999
2.8 ITU-T Recommendation K.20 (07-2003)
Resistibility of telecommunication equipment
installed in a telecommunications centre to
overvoltages and overcurrents
AC and lightning surge performance levels for the
Copyright for these tables belongs to Canon Communications LCC and
they originally appeared in “The 2004 ITU-T Telecommunication
Equipment Resistibility Recommendations” Compliance Engineering, 2004
Annual Reference Guide: 117-124. A further article on ITU-T testing is
“The New ITU-T Telecommunication Equipment Resistibility
Recommendations” Compliance Engineering 19, no. 1 (2002): 30-37.
99
IT
Equipment
parameters
A
Connects to
outside cable?
No overvoltage
testing
No
Test 1
600 V, 40 A
1.5 s
Yes
B
2
Has 100 A s
@ 600 V?1
E
No
Has minimum
26 AWG cord?
I
No
Pass Test 1?
Test 5
Yes
Yes
C
Has 1.3 A
DC limiting?2
120 V, 25 A,
30 min. or
open circuit
Yes
F
No
J
Pass 6.3.3
ground/line
separation?3
No
Yes
Yes
Pass Test 5?
No
Fail
Test 24
600 V, 7 A, 5 s
Test 35
600 V, 2.2 A
Yes
G
Test 3A5
600 V, <2.2 A, 30 min.,
no open circuit
Test 4
5
<limiting voltage, <2.2 A,
30 min. , no open circuit,
no overvoltage protector
voltage limiting
Has fire enclosure
and spacings?
No
No
H
D
Has
fire enclosure?
Yes
No
Pass test 2
pass tests 3, 4?
Yes
Pass
Yes
Notes:
1. Overcurrent protector I2t must be lower than any other equipment element which carries the same current.
2. UL states a fuse with a 1 A or less rating meets the 1.3 A criterion.
3. Pass for 120 V A.C. between telecommunications line and ground current <10 mA.
4. Test 2 not required if the equipment D.C. breaking is 1.3 A or less. See Note 2.
5. Tests 3 and 4 not required for equipment with less than 1000 m of outside cable.
Figure 6. UL 60950-1 Overvoltage flow chart
UL 60950-1 (04/2003)
Information Technology Equipment – Safety – Part 1: General Requirements
Clause 6.4 – Protection against overvoltage from power line crosses
Figure 6C – Overvoltage flowchart
Annex NAC (normative) – Power line crosses
Pass Criteria
100
Test 1
Test 2
Test 3
Test 3A
Test 4
Test 5
No equipment cheesecloth charring
Insulation OK
50 mm of 32 AWG wire or MDL-2 A fuse OK
I2t < 100 A2s @ 600 V rms AC
Ports
Waveshape
(Notes)
No. of Tests
Single
10/700 Voltage
(Note 1)
+5, -5
Single
10/700 Voltage
(Notes 3 & 4)
+5, -5
Multiple
10/700 Voltage
(Notes 1 & 5)
+5, -5
Multiple
10/700 Voltage
(Notes 3, 4 & 5)
+5, -5
Single
8/20 Current
(Note 6)
+5, -5
Multiple
8/20 Current
(Note 5 and 6)
+5, -5
Basic Test Levels
Enhanced Test Levels
Lighting
Test
Description
K.20
2.1.1.a
Inherent
Transverse
1.0 kV,
R = 25 Ω
2.1.1.b
Inherent
Port to Earth
1.0 kV,
R = 25 Ω
2.1.1.c
Inherent Port
to External Port
—
2.1.2.a
Coordination
Transverse
4 kV,
R = 25 Ω
2.1.2.b
Coordination
Port to Earth
4 kV,
R = 25 Ω
2.1.2.c
Coordination Port
to External Port
2.1.3a
Inherent Port
to Earth
2.1.3b
Inherent Port
to External Port
2.1.4a
Coordination
Port to Earth
2.1.4b
Coordination Port
to External Port
2.1.5a
Port to Earth
2.1.5b
Port to
External Port
2.1.6a
Port to Earth
2.1.6b
Port to
External Port
Test #
—
K.45
K.21
K.20
K.45
K.21
Primary Acceptance
Protection
Criteria
1.5 kV,
R = 25 Ω
1.5 kV,
R = 25 Ω
1.5 kV,
R = 25 Ω
(Note 7)
4 kV,
R = 25 Ω
1.5 kV,
R = 25 Ω
6 kV,
R = 25 Ω
(Note 2)
6 kV,
R = 25 Ω
(Note 7)
4 kV,
R = 25 Ω
None
A
A
If Fitted,
Yes
Special
Special
Protector
Protector Must Operate
at Maximum
Test Level
1.5 kV,
R = 25 Ω
—
1.5 kV,
R = 25 Ω
(Note 7)
4 kV,
R = 25 Ω
—
4 kV,
R = 25 Ω
6 kV,
R = 25 Ω
(Note 7)
1 kA/wire,
R=0
—
1 kA/wire,
R=0
1 kA/wire, R = 0,
6 kA Max. Return
—
1 kA/wire, R = 0,
6 kA Max. Return
None
A
Yes
Agreed
Protector
A
None
A
None
A
1.5 kV,
R = 25 Ω
6 kV,
R = 25 Ω
5 kA/wire,
R=0
(Note 7)
5 kA/wire,
R=0
5 kA/wire, R = 0,
30 kA Max. Return
(Note 7)
5 kA/wire, R = 0,
30 kA Max. Return
Test levels are given as the maximum D.C. charge voltage of the surge generator or current delivered to a tested equipment terminal and R
is the value of current limit resistor. The current limit resistor, R, may be internal or external to the generator.
Notes
1. Not applied to equipment designed to be always used with primary protection. For K.20, K.21 and Test 2.1.1 there must be operator
agreement and the an appropriate internal port test applied (see Table III).
2 Equipment with conductor to ground SPDs shall be tested at 1.5 kV instead of 6 kV. Insulated case equipment has 6 kV insulation test.
3. With network operator and manufacturer agreement, equipment containing high current carrying components which eliminate the
need for primary protection shall be tested without primary protection. Testing shall done with highest voltage high current carrying
components.
4. Equipment, which agreed not to use primary protection, shall be tested without primary protection. K.44, 3.1.4
5. Simultaneously applied to all ports. When the equipment has more than 8 ports, only 8 of the ports are tested.
6. Only for equipment, which contains high current carrying components that eliminate the need for primary protection.
7. Apply K.45 port to external port test at the K.20 enhanced level for small telecommunication centres with less than 250 lines.
Table 7. Lightning tests for ports connected to external symmetric-pair cables
101
Ports
Frequency
(Notes)
No. of Tests
Single
16-2/3 Hz,
or 50 Hz
or 60 Hz
(Note 1)
5
Single
16-2/3 Hz,
or 50 Hz
or 60 Hz
(Note 2)
5 at each
test level
Single
50 Hz
or 60 Hz
(Note 5)
1 set
Test #
Power
Test
Description
Basic Test Levels
K.20
K.45
Enhanced Test Levels
K.21
K.20
K.45
K.21
2.2.1.a
Induction
Inherent
Transverse
I2t = 0.2 A2s;
V = 600 V rms max.;
R = 600 Ω; t = 0.2 s
2.2.1.b
Induction
Inherent
Port to Earth
I2t = 0.2 A2s;
V = 600 V rms max.;
R = 600 Ω; t = 0.2 s
2.2.1.c
Induction
Inherent Port
to External Port
2.2.2.a
Induction
Coordination
Transverse
I2t = 1.0 A2s;
V = 600 V rms max.;
R = 600 Ω; t = 1.0 s; (Note 3)
I2t = 10 A2s;
450 V rms ≤ v ≤ 1500 V rms;
R = 200 Ω; 0.18 s ≤ t ≤ 2.0 s;
t = (400 000)/(v)2; (Note 4)
2.2.2.b
Induction
Coordination
Port to Earth
I2t = 1.0 A2s;
V = 600 V rms max.;
R = 600 Ω; t = 1.0 s; (Note 3)
I2t = 10 A2s;
450 V ≤ v ≤ 1500 V rms;
R = 200 Ω; 0.18 s ≤ t ≤ 2.0 s;
t = (400 000)/(v)2; (Note 4)
—
I2t = 0.2 A2s;
V = 600 V rms max.;
R = 600 Ω; t = 0.2 s
I2t = 1.0 A2s;
V = 600 V rms max.;
R = 600 Ω; t = 1.0 s;
(Note 3)
(Note 6)
I2t = 10 A2s;
450 V ≤ v ≤ 1500 V rms;
R = 200 Ω;
0.18 s ≤ t ≤ 2.0 s;
t = (400 000)/(v)2;
(Note 4)
2.2.2.c
2.3.1.a
Contact
Inherent
Transverse
V = 230 V rms;
R = 10 Ω, 20 Ω, 40 Ω, 80 Ω, 160 Ω, 300 Ω, 600 Ω, and 1000 Ω;
t = 900 s for each resistor value
2.3.1.b
Contact
Inherent
Port to Earth
V = 230 V rms;
R = 10 Ω, 20 Ω, 40 Ω, 80 Ω, 160 Ω, 300 Ω, 600 Ω, and 1000 Ω;
t = 900 s for each resistor value
Contact
2.3.1.c Inherent Port
to External Port
—
V = 230 V rms;
R = 10 Ω, 20 Ω, 40 Ω,
80 Ω, 160 Ω, 300 Ω,
600 Ω, and 1000 Ω;
t = 900 s for each
resistor value
(Note 6)
(Note 6)
None
A
Yes
Special
(Agreed
Primary)
Test
Protector
A
None
B,
Except A for
Enhanced
Level Testing
using
R = 160 Ω,
300 Ω and
600 Ω
I2t = 0.2 A2s;
V = 600 V rms max.;
R = 600 Ω; t = 0.2 s
Induction
Coordination
Port to
External Port
—
Primary Acceptance
Protection
Criteria
V = 230 V rms;
R = 10 Ω, 20 Ω, 40 Ω,
80 Ω, 160 Ω, 300 Ω,
600 Ω, and 1000 Ω;
t = 900 s for each
resistor value
Test levels are given as the maximum or range of generator open circuit A.C. voltages, A.C. frequency, test time and R is the value or values
of current limit resistor.
Notes
1. Not applied to equipment designs to be always used with primary protection. K.20 and K.21 equipment also needs operator agreement.
2. Equipment, containing high current carrying components, which eliminate the need for primary protection shall be tested without
primary protection. Equipment shall use special worst-case high current carrying components.
3. To suit local conditions a voltage of 300 V rms ≤ V ≤ 600 V rms and time t ≤ 1.0 s may be specified. The series current limit resistance shall
then be R = V(t)0.5
4. All voltage-time combinations shall be tested as defined by the time equation.
5. Equipment, which is always used with primary protection, shall be tested with special agreed primary protector.
6. Apply K.45 port to external port test at the K.20 enhanced level for small telecommunication centres with less than 250 lines.
Table 8. AC tests for ports connected to external symmetric-pair cables
102
Ports
Generator
(Notes)
No. of Tests
Single
8/20, 1.2/50
Test #
7.1
+5, -5
Lighting
Test
Description
Basic Test Levels
K.20
Unshielded Cable
500 V,
Inherent
R = 10 Ω
Longitudinal
Enhanced Test Levels
K.45
K.21
K.20
K.45
K.21
—
1.0 kV,
R = 10 Ω
1.0 kV,
R = 10 Ω
—
1.5 kV,
R = 10 Ω
Primary Acceptance
Protection
Criteria
None
Multiple
8/20, 1.2/50
(Note 1)
+5, -5
7.2
Shielded Cable
Inherent
Longitudinal
500 V,
R=0
—
1.0 kV,
R=0
1.0 kV,
R=0
—
A
1.5 kV,
R=0
Test levels are given as the maximum DC charge voltage of the surge generator delivered to a tested equipment terminal and R is the value
of current limit resistor. The current limit resistor, R, may be internal or external to the generator.
Note:
1. Cable screen is returned the port wires at the generator feed end see Figure 6.
Table 9. Lighning tests for ports connected to internal symmetric-pair cables.
2.11 ITU-T Recommendation K.45 (07-2003)
2.15 ETSI EN 300 386-1, (2003-05)
Resistibility of telecommunication equipment
installed in the access and trunk networks to
overvoltages and overcurrents
AC and lightning surge performance levels for the
external line ports of access (OSP) equipment. Two
surge withstand levels are specified, basic and
enhanced. Primaryequipment coordination tests are
included.
Electromagnetic compatibility and Radio spectrum
Matters (ERM); Telecommunication network
equipment; ElectroMagnetic Compatibility (EMC)
requirements
Lightning surge test circuits and performance level
overview for the external and internal line ports of
network equipment referencing IEC 61000-4-5.
2.16 ETSI EN 300 386-2, (1997-12)
2.12 ITU-T Recommendation K.50 (02/2000)
Safe limits of operating voltages and currents for
telecommunication systems powered over the
network
Provides guidance on voltages and currents that may
be safely used to power telecommunication systems
that are part of the network. Content is similar to
UL 60950-21.
2.13 ITU-T Recommendation K.51 (02/2000)
Safety criteria for telecommunication equipment
Recommendation uses ITU-T recommendation K.50
and parts of IEC 60950.
Electromagnetic compatibility and Radio spectrum
Matters (ERM); Telecommunication network
equipment; ElectroMagnetic Compatibility (EMC)
requirements; Part 2: Product family standard
Consolidated product test and performance standard
for the external and internal line ports of network
equipment. Internal port lightning surge testing
references EN 61000- 4-5 (1995) tests. External line
power induction testing references ITU-T
Recommendation K.20 (1993) and lightning surge
references ITU-T Recommendation K.20 (1993) or
K.21 (1988).
2.14 IEC 61000-4-5 (2001-04), Ed. 1.1
3 Surge Protective Devices
Electromagnetic compatibility (EMC)- Part 4-5:
Testing and measurement techniques - Surge
immunity test
Lightning surge test circuits and levels for the
external and internal line ports of networked
equipment
3.1 GR-1361, Issue 2, September 1998
Generic Requirements for Gas Tube Protector Units
(GTPUS)
AC and lightning surge test circuits and performance
levels for primary protectors using Gas Discharge
Tubes, GDTs with and without current-limiting
components.
103
3.2 GR-974-CORE, Issue 3
Generic Requirements for Telecommunications Line
Protector Units (TLPUs)
AC and lightning surge test circuits and performance
levels for primary protectors using GDTs or solidstate overvoltage protectors or hybrid combinations
with and without current-limiting components.
IEEE Standard Test Methods for Surge Protectors
Used in Low-Voltage Data, Communications, and
Signalling Circuits.
Sets of AC and impulse surge tests for surge
protectors with and without current-limiting
components.
3.8 IEEE Std C62.64-1997
3.3 UL 497, Edition 7 (April 2001)
Standard for Protectors for Paired Conductor
Communications Circuits
AC and impulse surge test circuits and performance
levels for voltage-limiting paired-conductor primary
protectors with and without current-limiting
components. These devices are to be used in
accordance with the applicable requirements of the
National Electrical Code, ANSI/NFPA 70.
3.4 UL 497A, Edition 3 (March 2001)
Standard for Secondary Protectors for
Communications Circuits
AC and impulse surge test circuits and performance
levels for current-limiting pairedconductor
secondary protectors with and without voltagelimiting components. Test conditions are similar to
those in UL 60950-1. These devices are to be used in
accordance with the applicable requirements of the
National Electrical Code, ANSI/NFPA 70.
3.5 UL 497B, Edition 4 (June 2004)
Standard for Protectors for Data Communication
and Fire Alarm Circuits
AC and impulse surge test circuits and performance
levels for voltage-limiting pairedconductor
secondary protectors with and without currentlimiting components.
3.6 UL 497C Edition 2 (August 2001)
Standard for Protectors for Coaxial
Communications Circuits
AC and impulse surge test circuits and performance
levels for voltage-limiting coaxial cable protectors
with and without current-limiting components.
These devices are to be used in accordance with the
applicable requirements of the National Electrical
Code, ANSI/NFPA 70.
3.7 IEEE Std C62.36-2000
104
IEEE Standard Specifications for Surge Protectors
Used in Low-Voltage Data, Communications, and
Signalling Circuits
Sets of AC and impulse surge preferred performance
levels for surge protectors with and without currentlimiting components.
3.9 ITU-T Recommendation K.28 (03/1993)
Characteristics of semi-conductor arrester
assemblies for the protection of telecommunications
installations
AC and impulse surge tests and preferred
performance levels for semi-conductor voltagelimiting paired-conductor primary protectors.
3.10 IEC 61643-21 (2000-09)
Low voltage surge protective devices - Part 21: Surge
protective devices connected to telecommunications
and signalling networks - Performance
requirements and testing methods
Sets of AC and impulse surge tests for surge
protectors with and without current-limiting
components.
3.11 ATIS T1.337-2004
Requirements for Maximum Voltage, Current, and
Power Levels in Network-Powered Transport
Systems
This document provides maximum dc steady state
and duration limited voltage, current, and power
limits to be observed when powering transport
systems over conventional network
telecommunications twisted-pair conductors. The
technical requirements contained herein are based
on industry-recognized safety and design standards,
addresses both the network and customer premises
environments, and are independent of the transport
system technology employed. Signalling levels and
transients are not covered, but should be considered
when evaluating a transport system for conformance
to these requirements if they will impact voltage,
current, or power levels.
4.3.4 IEEE Std C62.35-1987
IEEE standard test specifications for avalanche
junction semiconductor surge protective devices
3.12 ATIS T1.338-2004
Electrical Coordination of Primary and Secondary
Surge Protective Devices for Use in
Telecommunications Circuits
This document covers the electrical coordination
between primary and secondary surge protection
devices that are both connected to ground. Proper
coordination is essential to ensure that both primary
and secondary protectors operate in a manner that
provides the protected equipment with the most
effective protection from AC power or lightning
surges. This document does not address protection
of the AC power service.
4.3.5 IEEE Std C62.37-1996
IEEE standard test specification for thyristor diode
surge protective devices
4.4 IEC 61643-3x1
Series of test specifications for low-voltage surge
protective components
4.4.1 IEC 61643-311 (2001-10), Ed. 1.0
Components for low-voltage surge protective devices
- Part 311: Specification for gas discharge tubes
(GDT)
4.4.2 IEC 61643-321 (2001-12) Ed. 1.0
4 Surge Protective Components
4.1 REA Bulletin 345-83
Specification for Gas Tube Surge Arrestor,
RUS PE- 80
AC and impulse surge tests and performance levels
for heavy duty GDTs in rural service.
4.2 ITU-T Recommendation K.12 (02/2000)
Characteristics of gas discharge tubes for the
protection of telecommunications installations
Sets of AC and impulse surge tests and preferred
performance levels for GDTs
Components for low-voltage surge protective devices
- Part 321: Specifications for avalanche breakdown
diode (ABD)
4.4.3 IEC 61643-331 (2003-05) Ed. 1.0
Components for low-voltage surge protective devices
- Part 331: Specification for metal oxide varistors
(MOV)
4.4.4 IEC 61643-341 (2001-11) Ed. 1.0
Components for low-voltage surge protective devices
- Part 341: Specification for thyristor surge
suppressors (TSS)
4.3 IEEE Std C62.3x
Series of Test Specifications For Surge Protective
Components
4.3.1 IEEE Std C62.31-1987
IEEE Standard Test Specifications For Gas-Tube
Surge-protective Devices
4.3.2 IEEE Std C62.32-1981
IEEE standard test specifications for low-voltage air
gap surge-protective devices (excluding valve and
expulsion type devices)
4.3.3 IEEE Std C62.33-1982
IEEE standard test specifications for varistor surgeprotective devices
© 2004 Bourns, Ltd. Certain parts of this document are in joint copyright
with Canon Communications LLC and ATIS. Personal use of this material
is permitted. However, permission to reprint/republish this material for
advertising or promotional purposes or for creating new collective works
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copyright holders.
105
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