Bourns Gas Discharge Tubes Short Form

Bourns® Gas Discharge Tubes
Short Form Brochure
Bourns® GDT Product Overview
Introduction
Customers in many different industries rely on Bourns®
Gas Discharge Tubes (GDTs) to protect an ever increasing
array of electronic equipment. Bourns engineers have
innovated and improved GDT technology by designing
devices with faster response times, low capacitance, and
smaller sizes while at the same time increasing impulse
life performance.
Bourns offers GDTs in six unique families: Long Life,
Premium, High-Voltage, High Current, Hybrid and Fast
Acting. This broad offering of GDT devices addresses the
diverse protection needs of next generation electronics.
GDT Operation
GDT Types
GDT devices are designed to prevent damage from
transient disturbances by acting as a “crowbar”, virtually a
short circuit. When an electrical surge exceeds the GDT’s
defined sparkover voltage, the GDT becomes ionized and
conduction takes place within a fraction of a microsecond
diverting surge current to ground. When the surge
event subsides and the system voltage returns to normal
levels, the GDT will reset to its high-impedance (off)
state. The crowbar effect of the GDT effectively limits the
overvoltage to a low level and shunts the associated surge
current away from downstream components and circuitry.
Bourns offers a broad range of 2-electrode and 3-electrode
GDT devices. 2-electrode GDTs are single chamber
devices designed to provide protection to single lines
referenced to another line or ground. 3-electrode GDTs
provide dual line protection from either line to ground
or line to line (L1-G; L2-G or L-L). Bourns® GDTs are
available in a variety of DC breakdown voltages, current
ratings, sizes and mechanical configurations.
Voltage
Sparkover Voltage
1
2
Glow to Arc Transition
Glow Region
2-Electrode GDT
Figure 2
Arc Voltage
1
Time
3
Figure 1
GDT Voltage Breakdown Characteristic
2
Figure 3
2
3-Electrode GDT
Bourns® GDT Product Features
• RoHS compliant*
• Wide range of voltages available (75 V to 6000 V)
• Wide range of GDT sizes available
• Patented hybrid technology designs (MSP® GDT)
• Low arc (on-state) voltage
• Low capacitance and insertion loss
• Non-radioactive materials
• Devices are tested according to U.S.A. and International standards and recommendations
• Low work function designs that result in long and
stable service life
• Patented Switch-Grade Fail-Short devices available
on some models
Benefits of Partnering with Bourns for Your
GDT Circuit Protection Needs
• Special leadform and voltage screening capabilities
• Performance and reliability backed up by 50+ years of
designing and manufacturing GDTs
• Technical design support
• Technical committee participation and leadership
• Bourns lab facilities available for design verification of
customer circuits as well as with testing capabilities
for UL and Telcordia
• Bourns offers multiple circuit protection components for total design support including Thyristors, Diodes, Multifuse® PPTCs, CPTCs, TBU® High-Speed Protectors, Telefuse™ Telecom Protectors, MOVs and Inductors.
Switch-Grade Fail-Short Devices
Reduce the risk of thermal runaway with our Switch-Grade
Fail-Short device available on selected Bourns® GDTs.
• The fail-short contacts are spring-loaded switch-grade electrical conductors with no insulating burn through media or solder pellets under compression.
• The fail-short mechanism is activated by a breakaway
action, preventing solder residues from freezing the
fail-short mechanism and diurnal temperature failures.
• Superior thermal coupling between the Switch-Grade
Fail-Short device and suppression components allows
rapid Fail-Short activation in both vented and non-
vented GDTs, with one of the industry’s lowest
contact resistance.
• Available on Model 2026, 2036 and 2026 MSP® GDTs.
*RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.
3
Bourns® GDT Application Overview
Applications by Market
Telecom/Datacom
Ethernet (Exposed)
Ethernet (PoE)
Primary Protection Modules
MDF Modules
Splitters
Telecom CPE
Telecom Line Cards
ADSL Modems
VDSL Modems
Set-top Boxes
Gateways
IAD
Base Station Antennas
Voice Modes
MDC/PCI Modems
VoIP
Industrial/Consumer
RS-485
RS-232
Antenna Protection
Railroad Protection
Irrigation Systems
Home Office Equipment
Instrumentation
TVS Protection Devices
Power Supplies
Solar Power
Smart Grid
Smart Power Security Equipment
Transportation Signaling
Industrial Process Controls
Petro-Chemical Equipment
RF
Input
2035-09-SM
DC
Supply
SMLJ20A
Figure 4
Satellite Receiver RF Input
L
N
MOV20-431K
2035-35-SM
Figure 5
AC Input Surge Protection
CD143A-SR70
2038-110-SM
VDSL
Driver
TISP4P015L1NR
Figure 6
VDSL Driver Side Protection
TBU-CA085-500-WH
2020-42T-C4LF
VDSL
TBU-PL085-200-WH
SLIC
4
Figure 7
B1250T
VDSL Over Pots
B1250T
Filter
CMF-RL50A
TBU-CA065-200-WH
Tip
TBU-CA065-200-WH
o
+t
t
RS485
Transceiver
2038-15-SM
TISP4xxxM3BJ
o
2036-35
o
t
CDSOT23-SM712
CMF-RL50A
Ring
TISP4xxxM3BJ
o
+t
High-Current RS-485
Figure 8
Data Line Protection
Figure 9
VCC
MF-R018/250
CDSOT23-S2004
TBU-CA085-200-WH
LVDS
Device
VCC
Tip
TBU-CA085-200-WH
TISP4xxxM3BJ
o
t
VCC
2031-42T-SM
o
+t
2036-35-SM
o
t
Differential
Output
CDSOT23-S2004
Ring
MF-R018/250
2031-42T-SM
TISP4xxxM3BJ
o
+t
Figure 10
LVDS Input Port Surge Protection
Solid-State
Hook Switch
Figure 11
TIP
Isolation Barrier
TISP4310T3BJ
Tip
Current
Sink
Ring
Detect
Ring
Tx
Power Feed
Rx Signal
Tx Signal
2035-60-SM
VOICE Protection Module
xDSL
Transceiver
2035-42-SM
Rx
RING
Modem DAA
Figure 12
Modem Protection
Figure 13
XDSL Modem Protection
5
GDT General Information
Quality Systems
Performance by Design
Bourns® GDTs are produced in ISO 9001 certified facilities.
Bourns® GDT device designs are based on standard
ITU-T K.12, as well as key considerations of
RUS-PE80/IEEE C62.31, GR-1361, GR-974, GR-1089,
ITU-T K.20/21, IEC61643-311 (EN61643-311), and
DIN VDE 0845 part 2.
Quality Monitoring
Bourns® GDTs are 100 % production tested to ensure
compliance of key product parameters.
UL Listing
Quality Sampling Inspections
Bourns® GDTs are inspected to AQL 0.65, DIN ISO 2859
Bourns® GDT devices are recognized to UL 497B under
UL file E153537.
specifications.
Operating and Storage Conditions
Regulated Substances
Bourns® GDT devices comply with the general
operating and storage conditions as detailed in
revelent IEC standards, or ITU K.12 unless otherwise
specified in the product series data sheets.
Bourns® GDTs with an “LF” designator are RoHS
compliant as defined in the Annex to 2002/95/EC.
By definition, Bourns® GDTs and Switch-Grade FailShort option with an “LF” suffix are below maximum
concentration values (no exemptions used) for:
Operating temperature range: -40 ˚C to +85 ˚C.
GDTs are assigned climatic category 40/90/21 in
accordance with IEC 60068-1.
6
• Lead
• Cadmium
• Hexavalent Chromium
• Mercury and Mercury Compounds
• PBBs and PBDEs
Hybrid GDTs
Hybrid GDT Devices
A hybrid GDT is a device that integrates two or more
protection technologies into its design to provide an
enhanced circuit protection solution.
2026-xx-XX-MSP Heavy Duty, 3-Electrode Multi-Stage Protector MSP® GDT
Size
(mm)
8 x 14
Max. Surge
AC
(10/350
Discharge
µs) 1
Life (20
Operation operations)
5 kA
10 A
Surge Life
(10/1000
µs)
500 A, >1000
Operations
DC
Form
Breakdown Packaging Factor
Range (V)
230 - 330
Bulk
Advantages
•
•
•
•
Long service life
Hybrid solid-state design
Solid-state response combined with robust GDT
Radial
Drop-in primary protection solution for all paired
leaded
communications lines
• GR-974 tested
• UL Listed
7
Long Life GDTs
Long Life GDT Devices
Long Life GDT devices are designed to meet or exceed
GDT performance as specified in ITU K.12. These GDTs
are available in heavy duty, medium duty and light duty
versions and are targeted to customers requiring superior
performance of end products over a longer service life.
2026-xx-XX
In addition to ITU K.12, some heavy duty long life GDT
series are based on key considerations of RUS-80/IEEE
465.1, GR-1361/GR-974/1089 as well as ITU K.20/21.
Heavy Duty, 3-Electrode Balanced TRIGARD® GDT
Surge AC Discharge Surge Life
DC
Size Max.
Capacitance Packaging Form
(8/20
µs)
Life
(10
Breakdown
(mm) 1 operation operations) (10/1000 µs) Range (V)
(pF)
Factor
8 x 11
2027-xx-XX
40 kA
20 A
1000 A, >400
Operations
75 - 600
<2
Bulk
Core,
Radial
leaded
Advantages
•
•
•
•
•
•
Heavy Duty, 2-Electrode GDT
Surge AC Discharge Surge Life
DC
Size Max.
Capacitance Packaging Form
(8/20
µs)
Life
(10
Breakdown
(mm) 1 operation operations) (10/1000 µs) Range (V)
(pF)
Factor
8x6
2027-xx-SM
25 kA
10 A
500 A, >400
Operations
75 - 600
<1
Bulk, Tape &
Reel
Core,
Axial
leaded
Advantages
•
•
•
•
•
•
8x6
25 kA
10 A
500 A, >400
Operations
75 - 600
<1
Bulk, Tape &
Reel
Advantages
• Long and stable service life
Surface • Heavy duty AC & surge current ratings
• Precision ±15 % tolerance on 150-600 V devices
mount • Low capacitance and insertion loss
• UL Listed and RoHS compliant*
Light Duty, 2-Electrode Miniature GDT
Surge AC Discharge Surge Life
DC
Size Max.
Capacitance Packaging Form
(8/20
µs)
Life
(10
Breakdown
(mm) 1 operation operations) (10/1000 µs) Range (V)
(pF)
Factor
5 x 5.4
8
Long and stable service life
Heavy duty AC & surge current ratings
Precision ±15 % tolerance on 150-600 V devices
Low capacitance and insertion loss
Custom leadforms available
UL Listed and RoHS compliant*
Heavy Duty, 2-Electrode Surface Mount GDT
Surge AC Discharge Surge Life
DC
Size Max.
Capacitance Packaging Form
(8/20
µs)
Life
(10
Breakdown
(mm) 1 operation operations) (10/1000 µs) Range (V)
(pF)
Factor
2035-xx-XX
Long and stable service life
Balanced Trigard® design
Heavy duty AC & surge current ratings
Switch-Grade Fail-Short available
Low capacitance
UL Listed and RoHS compliant*
10 kA
5A
100 A, >300
Operations
90 - 600
<1
Bulk, Tape &
Reel
*RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.
Core,
Axial
leaded
Advantages
•
•
•
•
•
Long and stable service life
Light duty AC & surge current ratings
Compact size ideal for board level protetion
Low capacitance and insertion loss
UL Listed and RoHS compliant*
2035-xx-SM
Light Duty, 2-Electrode Miniature Precision Surface Mount GDT
Size
(mm)
4.4 x 5
2036-xx-XX
Max. Surge AC Discharge Surge Life
DC
Form
(8/20 µs)
Life (10
Breakdown Capacitance
Packaging Factor
(10/1000
µs)
(pF)
1 operation operations)
Range (V)
10 kA
5A
100 A, >300
Operations
90 - 600
<1
Bulk, Tape
and Reel
Advantages
• Long and stable service life
Surface • Light duty AC & surge current ratings
• Compact size ideal for board level protection
mount • Low capacitance and insertion loss
• UL Listed and RoHS compliant*
Medium Duty, 3-Electrode Mini TRIGARD™ GDT
Surge AC Discharge Surge Life
DC
Size Max.
Capacitance Packaging Form
(8/20
µs)
Life
(10
Breakdown
(mm) 1 operation operations) (10/1000 µs) Range (V)
(pF)
Factor
5 x 7.5
2036-xx-SM
5 x 7.3
200 A, >300
Operations
75 - 600
<2
Bulk
Long and stable service life
Balanced Mini TRIGARD™ design
Medium duty AC & surge current rating
Low capacitance and insertion loss
Switch-Grade Fail-Short available
UL Listed and RoHS compliant*
Max. Surge AC Discharge Surge Life
DC
Form
(8/20 µs)
Life (10
Breakdown Capacitance
Packaging Factor
(10/1000
µs)
(pF)
1 operation operations)
Range (V)
20 kA
10 A
200 A, >300
Operations
75 - 600
<2
Bulk, Tape &
Reel
•
•
Surface •
mount •
•
•
Advantages
Long and stable service life
Balanced Mini TRIGARD™ design
Medium duty AC & surge current rating
Low capacitance and insertion loss
Switch-Grade Fail-Short available
UL Listed and RoHS compliant*
Light Duty, 2-Electrode Miniature GDT
Size
(mm)
5x5
2038-xx-SM
10 A
•
•
•
•
•
•
Medium Duty, 3-Electrode Surface Mount Mini TRIGARD™ GDT
Size
(mm)
2037-xx-XX
20 kA
Core,
Radial
leaded
Advantages
Max. Surge AC Discharge Surge Life
DC
Capacitance Packaging Form
(8/20 µs)
Life (10
Breakdown
(10/1000
µs)
(pF)
Factor
1 operation operations)
Range (V)
10 kA
5A
100 A, >300
Operations
90 - 600
<1
Bulk, Tape &
Reel
Advantages
• Long and stable service life
Core, • Light duty AC & surge current ratings
Axial • Compact size ideal for board level protection
leaded • Low capacitance and insertion loss
• UL Listed and RoHS compliant*
Light Duty, Symmetrical 3-Electrode Surface Mount Mini TRIGARD™ GDT
Size
(mm)
5 x 7.3
Max. Surge AC Discharge Surge Life
DC
Capacitance Packaging Form
(8/20 µs)
Life (10
Breakdown
(10/1000
µs)
(pF)
Factor
1 operation operations)
Range (V)
10 kA
5A
200 A, >300
Operations
150 - 1100
<1
Bulk, Tape &
Reel
•
•
Surface •
mount •
•
•
Advantages
Long and stable service life
Light duty AC & surge current ratings
Symmetric breakdown voltage (L-L & L-G)
Compact size ideal for board level protection
Low capacitance and insertion loss
UL Listed and RoHS compliant*
9
Premium GDTs
Premium GDT Devices
Premium GDT devices are designed to meet selected
performance requirements as specified in ITU K.12.
These GDTs are available in heavy duty, medium duty
2045-xx-XX
Medium Duty, 2-Electrode GDT
AC Discharge
Size Max. Surge
µs)
Life (1
(mm) 1 (8/20
operation operation)
8x6
2049-xx-XX
15 kA
5A
8x6
20 kA
20 A
2.7 x 3.2
x 4.5
2 kA
Not Rated
5 x 7.2
<1.5
Bulk, Tape
and Reel
• Medium service life
Axial • Medium duty surge rating
leaded • Low capacitance and insertion loss
• UL Listed and RoHS compliant*
Surge Life
(10/1000 µs)
100 A, 500
Operations
DC
Form
Breakdown Capacitance
Packaging Factor
(pF)
Range (V)
75 - 600
<1.5
Bulk, Tape
and Reel
Advantages
• Medium service life
Axial • Medium duty surge rating
leaded • Low capacitance and insertion loss
• UL Listed and RoHS compliant*
DC
Surge Life Breakdown
Capacitance Packaging Form
(10/1000 µs) Range (V)
(pF)
Factor
10 A, 100
Operations
90 - 600
<1
•
•
Surface •
Tape and Reel
Mount •
•
•
Advantages
Medium service life
Compact low profile footprint
µSurface mount
Low capacitance and insertion loss
Light duty surge rating
UL Listed and RoHS compliant*
10 kA
5A
DC
Surge Life
Capacitance Packaging Form
(10/1000 µs) Breakdown
(pF)
Factor
Range (V)
200 A, 150
Operations
230 - 800
<2
Advantages
• Medium service life
Surface • Light duty surge rating
Tape and Reel
• Mini-surface mount
Mount • Low capacitance and insertion loss
• UL Listed and RoHS compliant*
Light Duty, 2-Electrode Miniature GDT
Size
(mm)
4 x 4.2
10
75 - 470
Advantages
Light Duty, Symmetrical 3-Electrode Miniature GDT
AC Discharge
Size Max. Surge
µs)
Life (1
(mm) 1 (8/20
operation operation)
2053-xx-SM
100 A, 500
Operations
DC
Form
Breakdown Capacitance
Packaging Factor
(pF)
Range (V)
Light Duty, 2-Electrode Surface Mount µGDT
Surge AC Discharge
Size Max.
(8/20
µs)
Life (1
(mm) 1 operation
operation)
2052-xx-SM
Surge Life
(10/1000 µs)
Medium Duty, 2-Electrode GDT
Surge AC Discharge
Size Max.
(8/20
µs)
Life (1
(mm) 1 operation
operation)
2051-xx-SM
and light duty versions and are targeted to customers
that require a cost-effective protection solution for end
products with short to medium service life requirements.
Max. Surge
(8/20 µs)
1 operation
5 kA
AC Discharge Surge Life
DC
Capacitance Packaging Form
Life (1
Breakdown
(pF)
Factor
operation) (10/1000 µs) Range (V)
3A
100 A, 300
Operations
75 - 600
<1
Advantages
• Medium service life
Surface • Light duty surge rating
Tape and Reel
• Mini-surface mount
Mount • Low capacitance and insertion loss
• UL Listed and RoHS compliant*
2054-xx-SM
Light Duty, 3-Electrode Miniature Surface Mount GDT
Size
(mm)
5 x 7.2
2055-xx-SM
6 x 4.2
5A
200 A, 5
Operations
230 - 470
<2
Advantages
• Medium service life
Surface • Light duty surge rating
Tape and Reel
• Mini-surface mount
Mount • Low capacitance and insertion loss
• UL Listed and RoHS compliant*
Max. Surge
(8/20 µs)
1 operation
N/A
AC Discharge Surge Life
DC
Capacitance Packaging Form
Life (1
Breakdown
(10/1000
µs)
(pF)
Factor
operation)
Range (V)
10 A
100 A, 300
Operations
230 - 600
<1
Advantages
• Medium service life
Surface • Light duty surge rating
Tape and Reel
• Mini-surface mount
Mount • Low capacitance and insertion loss
• UL Listed and RoHS compliant*
Light Duty, 3-Electrode GDT
Size
(mm)
6 x 8.5
2057-xx-XX
10 kA
AC Discharge Surge Life
DC
Capacitance Packaging Form
Life (1
Breakdown
(10/1000
µs)
(pF)
Factor
operation)
Range (V)
Light Duty, 2-Electrode Miniature Surface Mount GDT
Size
(mm)
2056-xx-XX
Max. Surge
(8/20 µs)
1 operation
Max. Surge
(8/20 µs)
1 operation
10 kA
AC Discharge Surge Life
DC
Capacitance Packaging Form
Life (1
Breakdown
(pF)
Factor
operation) (10/1000 µs) Range (V)
5A
200 A, 100
Operations
90 - 600
<2
Bulk
•
•
Radial •
leaded •
•
•
Advantages
Medium service life
Light duty surge rating
Compact mini size
Fail-Short available
Low capacitance and insertion loss
UL Listed and RoHS compliant*
Light Duty, 2-Electrode Miniature GDT
Size
(mm)
5.5 x 6
Max. Surge
(8/20 µs)
1 operation
10 kA
AC Discharge Surge Life
DC
Capacitance Packaging Form
Life (1
Breakdown
(pF)
Factor
operation) (10/1000 µs) Range (V)
5A
100 A, 300
Operations
75 - 470
<1
Bulk, Tape
and Reel
*RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.
Advantages
• Medium service life
Axial • Light duty surge rating
• Compact mini size
leaded • Low capacitance and insertion loss
• UL Listed and RoHS compliant*
11
High-Current GDTs
High-Current GDT Devices
High-current GDT devices are designed to handle very
large impulse discharge currents. Typically utilized in
surge protection devices (SPDs), these GDTs have 8/20 µs
impulse current ratings of 40-100 kA.
2047-xx-XX
Heavy Duty, 2-Electrode GDT
Size
(mm)
12.7 x 12.7
2061-xx-A
11.8 x 12
11.8 x 17
<5
Bulk
Core, radial
leaded
Advantages
• Heavy duty
• >40 kA 8/20 µs surge current rating
• 8 kA 10/350 µs surge current rating
• High isolation resistance
• Long life and stability over service life
• Terminals available
• Low capacitance and insertion loss
• UL Listed and RoHS compliant*
Max. Surge
(8/20 µs)
60 kA
DC
Breakdown Capacitance
Packaging
(pF)
Range (V)
230 - 800
<10
Bulk
Form
Factor
Core
Advantages
•
•
•
•
•
Heavy duty
60 kA 8/20 µs surge current rating
High isolation resistance
Low capacitance and insertion loss
UL Listed and RoHS compliant*
Max. Surge
(8/20 µs)
100 kA
DC
Breakdown Capacitance
Packaging
(pF)
Range (V)
230 - 800
<10
Bulk
Form
Factor
Core
Advantages
•
•
•
•
•
Heavy duty
100 kA 8/20 µs surge current rating
High isolation resistance
Low capacitance and insertion loss
UL Listed and RoHS compliant*
Heavy Duty, 2-Electrode GDT
Size
(mm)
11.8 x 32
12
90 - 350
Form
Factor
2-Electrode Power GDT
Size
(mm)
2097-xx-D
>40 kA
DC
Breakdown Capacitance
Packaging
(pF)
Range (V)
2-Electrode Power GDT
Size
(mm)
2063-xx-A
Max. Surge
(8/20 µs)
Max. Surge
(8/20 µs)
25 kA
DC
Breakdown Capacitance
Packaging
(pF)
Range (V)
1000 - 2200
<10
Bulk
Form
Factor
•
•
Core with lugs •
•
•
Advantages
High-voltage DC breakdown voltages up to 2.2 kV
High isolation resistance
25 kA 8/20 µs surge current rating
Low capacitance and insertion loss
UL Listed and RoHS compliant*
*RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.
High-Voltage GDTs
High-Voltage GDT Devices
High-voltage GDT devices are designed specifically for
those customers and applications requiring a high level
2039-xxx-XX
of isolation. This family of GDT is available with DC
breakdown voltages ranging from 800 V to 6000 V.
2-Electrode Miniature GDT
Size
(mm)
5 x 4.1
Max. Surge
(8/20 µs)- 1
operation
5 kA
DC
Breakdown Capacitance
Packaging
(pF)
Range (V)
800 - 1100
<1
Bulk, Tape
and Reel
Form
Factor
Core,
axial leaded
Advantages
•
•
•
•
•
High-voltage DC breakdown voltages up to 1.1 kV
High surge current rating
Compact mini size
Low capacitance and insertion loss
UL Listed and RoHS compliant*
2039-xxx-SM 2-Electrode Surface Mount Miniature GDT
Size
(mm)
5 x 4.4
Max. Surge
(8/20 µs)- 1
operation
5 kA
DC
Breakdown Capacitance
Packaging
(pF)
Range (V)
800 - 1100
<1
Form
Factor
Advantages
•
•
Tape and Reel Surface mount •
•
•
High-voltage DC breakdown voltages up to 1.1 kV
High surge current rating
Mini surface mount device
Low capacitance and insertion loss
UL Listed and RoHS compliant*
2087-xxx-SM 2-Electrode Miniature GDT
Size
(mm)
4x4
2089-xxx-XX
Max. Surge
(8/20 µs)- 1
operation
3 kA
DC
Breakdown Capacitance
Packaging
(pF)
Range (V)
800 - 2000
<0.5
Form
Factor
Advantages
•
Tape and Reel Surface mount ••
•
High-voltage DC breakdown voltages up to 2 kV
Mini surface mount device
Low capacitance and insertion loss
UL Listed and RoHS compliant*
2-Electrode Miniature GDT
Size
(mm)
Max. Surge
(8/20 µs)- 1
operation
5.5 x 6
3 kA
DC
Breakdown Capacitance
Packaging
(pF)
Range (V)
1000 - 4000
<1.5
Bulk, Tape
and Reel
Form
Factor
Axial leaded
Advantages
•
•
•
•
High-voltage DC breakdown voltages up to 4 kV
Mini axial device
Low capacitance and insertion loss
UL Listed and RoHS compliant*
2093-xxx-SM 2-Electrode GDT
Size
(mm)
6.2 x 4.2
2095-xxx-XX
Max. Surge
(8/20 µs)- 1
operation
5 kA
DC
Breakdown Capacitance
Packaging
(pF)
Range (V)
1000 - 3000
<1.5
Form
Factor
Advantages
•
Tape and Reel Surface mount ••
•
High-voltage DC breakdown voltages up to 3 kV
Surface mount device
Low capacitance and insertion loss
UL Listed and RoHS compliant*
2-Electrode GDT
Size
(mm)
Max. Surge
(8/20 µs)- 1
operation
8x8
3 kA and 8 kA
DC
Breakdown Capacitance
Packaging
(pF)
Range (V)
800 - 6000
<1.5
Bulk, Tape
and Reel
Form
Factor
Axial leaded
Advantages
•
•
•
•
High-voltage DC breakdown voltages up to 6kV
High surge current rating
Low capacitance and insertion loss
UL Listed and RoHS compliant*
13
Fast Acting GDTs
T-Series Fast Acting GDT Devices
Bourns has developed a line of fast acting GDTs
designed specifically for use with the Bourns® TBU®
High-Speed Protector (HSP). The T-Series GDTs are
designed to limit high-speed impulse voltages to levels
below the TBU® HSP peak voltage impulse rating (Vimp).
Voltages exceeding the TBU® HSP Vimp rating may
cause damage to the TBU® HSP.
The T-Series GDT and TBU® HSP provide an extremely
fast, low voltage let-through protection solution that
is well-suited to sensitive electronics susceptible to
damage from voltage and current transients.
2020-xxT
2030-xxT-SM
T -Series Fast Acting GDT Advantages
• Designed specifically for the TBU® HSP
• Simplifies designing with the TBU® HSP
• Extremely fast overvoltage protection limiting surges below the Vimp of the TBU® HSP
• Low capacitance, making it ideal for
high-speed applications
• 2-electrode and 3-electrode designs available
• Optional Switch-Grade Fail-Short available for Model 2020
3-Electrode T-Series Fast Acting GDT
Size
(ø x L)
Max. 8/20 µs
Impulse
Discharge
Current
Min. DC
Breakdown*
Max. Impulse
Breakdown Voltage
@ 5 kV 1.2 x 50 µs
7.9 x
11.2 mm
5 kA
60 V, 185 V, 360 V
500, 650,850 V
Capacitance Packaging
@ 1 MHz
< 1 pF
Bulk
Form
Factor
Optional
SwitchGrade
Fail-Short
Radial leaded
Yes
Form
Factor
Optional
SwitchGrade
Fail-Short
Surface mount
No
Form
Factor
Optional
SwitchGrade
Fail-Short
Surface mount
No
3-Electrode Surface Mount T-Series Fast Acting GDT
Size
(ø x L)
Max. 8/20 µs
Impulse
Discharge
Current
Min. DC
Breakdown*
Max. Impulse
Breakdown Voltage
@ 5 kV 1.2 x 50 µs
5x
7.5 mm
4 kA
185 V, 360 V
650, 850 V
Capacitance Packaging
@ 1 MHz
<1 pF
Bulk, Tape
and Reel
2031-xxT-SM 2-Electrode Surface Mount T-Series Fast Acting GDT
14
Size
(ø x L)
Max. 8/20 µs
Impulse
Discharge
Current
Min. DC
Breakdown*
Max. Impulse
Breakdown Voltage
@ 5 kV 1.2 x 50 µs
5x
4.4 mm
2 kA
60 V, 185 V, 360 V
500, 650,850 V
Capacitance Packaging
@ 1 MHz
<1 pF
Bulk, Tape
and Reel
* End of life value for DC Breakdown. Fresh devices will have significantly higher DC breakdown when measured.
GDTs in Evaluation Boards
RS-485 Evaluation Board Top Side Layout*
This Evaluation Board serves as an aid in
evaluating circuit protection on RS-485
serial device ports using two Bourns®
TBU® High-Speed Protectors (HSPs), two
fast acting GDTs and two TVS diodes to
meet the required industry standards on
RS-485 port interfaces. The recommended
Bourns® TBU® HSP solution with a
low capacitance GDT offers enhanced
high-speed performance features over
competing technologies, which can help
the design engineer increase the surge and
transient protection level on RS-485 ports
and place the entire circuit protection
solution into a smaller reduced PCB
area. Bourns has developed an RS-485
Evaluation Board (measuring 45 mm x
21 mm x 1.2 mm), manufactured using
FR4 PCB with nickel gold plating on the
top and bottom sides.
TBU® HSP 1
1
1
2
1
1
IN1
GDT1
2
2
GDT3
3
1
TVS1
1
GND
GDT2
2
2
2
2
1
GND
TVS5
1
1
TVS4
TBU® HSP 2
RS-485 Evaluation Board Schematic
Figure 16
OUT1
3
TVS2
1
IN2
1
2
1
1
3
2
3
2
1
TVS3
1
1
OUT2
* The default configuration of this board uses 2 GDTs
(GDT1, GDT2) and discrete SMB TVS diodes
(TVS1,TVS2). The board allows different
configurations:
•2 single 2031 GDTs (GDT1 and GDT2) may be
replaced by a 2030 GDT (GDT3).
•2 SMB TVS diodes (TVS1 and TVS2) may be replaced with a) Two SOT23 TVS diodes (TVS3,
TVS4) or b) a single TVS diode array (TVS5).
Applications
Port Protection
2020 GDT Part Number
2030 GDT Part Number
2031 GDT Part Number
TBU® HSP Part Number
CAN-bus
2020-23T-xxxLF
2030-23T-RPLF
2031-23T-SM-RPLF
TBU-CA065-100-WH
RS-232
2020-23T-xxxLF
2030-23T-SM-RPLF
2031-23T-SM-RPLF
TBU-CA065-200-WH
RS-422
2020-23T-xxxLF
2030-23T-SM-RPLF
2031-23T-SM-RPLF
TBU-CA065-200-WH
RS-485
2020-23T-xxxLF
2030-23T-SM-RPLF
2031-23T-SM-RPLF
TBU-CA065-200-WH
SDI
2020-23T-xxxLF
2030-23T-SM-RPLF
2031-23T-SM-RPLF
TBU-CA065-100-WH
VDSL
2020-15T-xxxLF
2030-15T-SM-RPLF
2031-15T-SM-RPLF
TBU-CA050-500-WH
See data sheet for lead form options
15
Worldwide Sales Offices
CountryPhone
Americas: +1-951-781-5500 Brazil:
+55 11 5505 0601 China:
+86 21 64821250
Europe:
+41 (0)41 768 5555
Japan: +81 49 269 3204 Singapore: +65 6348 7227 Taiwan:
+886 2 25624117 Other Asia-Pacific Countries: +886 2 25624117 Fax
+1-951-781-5006
+55 11 5505 4370
+86 21 64821249
+41 (0)41 768 5510
+81 49 269 3297
+65 6348 1272
+886 2 25624116
+886 2 25624116
Technical Assistance
RegionPhone
Asia-Pacific: +886 2 25624117 Europe, Middle East, Africa: +41 (0)41 768 5555 Americas: +1-951-781-5500 Fax
+886 2 25624116
+41 (0)41 768 5510
+1-951-781-5700
www.bourns.com
Bourns® products are available through an extensive network of manufacturer’s representatives, agents and distributors.
To obtain technical applications assistance, a quotation, or to place an order, contact a Bourns representative in your area.
Specifications subject to change without notice. Actual performance in specific customer applications may differ due to the
influence of other variables. Customers should verify actual device performance in their specific applications.
“Mini TRIGARD” and “Telefuse” are trademarks of Bourns, Inc. in the U.S. and other countries.
“Bourns”, “Multifuse”, “TBU”, “MSP” and “TRIGARD” are registered trademarks of Bourns, Inc. in the U.S. and other countries.
COPYRIGHT© 2012, BOURNS, INC. • LITHO IN U.S.A. • WAG • 10/12 • XX/GDT1208