420le_b.pdf

05048
420LB28 - 420LE60
Only One Name Means ProTek’Tion™
TWO LINE PAIR 4-20mA CONTROL LOOP PROTECTOR
Description
The 420LE/B series is a two stage transient voltage protector providing primary and secondary protection against
lightning, inductive switching and electrostatic discharge (ESD) transient threats. The first stage diverts the transient
current through the ground terminal return path and the second stage clamps the voltage to a safe level without interruption of service.
The 420LE/B series is designed to protect data lines from differential (line to line) and common mode (line to ground)
transients. Terminals 1 and 2, 3 and 4 for the 420LE and pins 2 and 3, 4, and 5 for the 420LB are designated as line
pairs. Each line pair is referenced to ground. A transient voltage suppressor is connected across each line pair for differential mode protection. Each line pair is referenced to ground.
420LB
This product can also be used on telephone, signal/data lines, security, timing and control interface circuits. For most
applications, the product should be located as close as possible to the equipment being protected. A low impedance
grounding system is important to maintain a low voltage clamp between the line-to-ground connection.
420LE
Features
applications
• Compatible with IEC 61000-4-2 (ESD): Air - 15kV, Contact - 8kV
• Compatible with IEC 61000-4-4 (EFT): 40A - 5/50ns
• Compatible with IEC 61000-4-5 (Surge): 95A, 8/20µs, Level 4 (LineGnd) & 48A, Level 4 (Line-Line)
• Designed for 4-20mA Current Loops
• Automatic Reset - Does Not Interrupt Service
• Permanent Two-Stage Line Pair Protection
• Common Mode & Differential Mode Protection
• Subnanosecond Response Time
• Effective Against Lightning, Inductive Switching and ESD
• Multi-Process Control Loops
• Fire & Security Systems
• Petro-Chemical Plants
• Refineries & Tank Farms
Mechanical characteristics
• Approximate Weight: 28 grams (420LB) & 142 grams (420LE)
• Flammability Rating UL 94V-0
05048.R5 9/12
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05048
420LB28 - 420LE60
Only One Name Means ProTek’Tion™
typical device characteristics
MAXIMUM RATINGS @ 25°C Unless Otherwise Specified
PARAMETER
SYMBOL
VALUE
UNITS
IO
100
mA
Operating Line Current
Transient Source Voltage
-
6
kV
Transient Current - 8/20µs waveform
-
10
kA/Wire
Operating Temperature
TA
-55 to 100
°C
TSTG
-55 to 100
°C
Storage Temperature
ELECTRICAL CHARACTERISTICS PER LINE @ 25°C Unless Otherwise Specified
PART
NUMBER
MAXIMUM
operating
line VOLTAGE
MAXIMUM
LEAKAGE
CURRENT
MAXIMUM
CLAMPING
VOLTAGE
(8/20µs)
maximum
capacitance
maximum
line
throughput
resistance
VOP
±volts
@ vop
ID
µA
@ 2000A
VC
volts
@ 0v, 1mhz
c
pF
r
ohms
420LB28
28.0
5.0
40
2800
12
420LB35
35.0
5.0
60
1500
12
420LB60
60.0
5.0
85
1000
12
420LE28
28.0
5.0
40
2800
12
420LE35
35.0
5.0
60
1500
12
420LE60
60.0
5.0
85
1000
12
installation instructions
There are five (5) terminals on the LINE SIDE and five (5) terminals on the EQUIPMENT SIDE of the 420LE, 4 data lines and one ground. Both grounds are connected
together internally. A single low impedance is ground sufficient. Incoming data lines are cut or disconnected from the equipment to insert the 420LE/B products. The
incoming lines are to be connected to the line side terminals as the equipment side lines are connected to the equipment side terminals. The location of the product
should be as close to the equipment as possible. The 420LE/B series is designed with a short circuit failure mode to give maximum protection. A fuse, fusible link, or
circuit breaker is recommended for each data/signal line on the input side for those that require an open circuit failure mode.
Caution: A low DC resistance ground may not be indicative of a good lightning ground. Lightning contains a broad spectrum of frequencies up to 1 MHz. A low impedance path to ground at the transient frequencies is necessary. A ground strap is recommended or a #6 AWG stranded wire. For wire lengths over 1.5 meters, there
may be some excessive line to earth potential under severe thunderstorm conditions.
05048.R5 9/12
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05048
420LB28 - 420LE60
Only One Name Means ProTek’Tion™
package information
420lB outline dimensions
dim
millimeters
inches
min
max
min
max
A
-
12.7
-
0.50
B
-
76.2
-
3.0
C
-
48.2
-
1.90
D
-
7.6
-
0.30
E
-
17.8
-
0.7
Notes
1. I/O contacts spaced at 0.156” (3.96mm) centers.
A
B
LINE
EQUIPMENT
D
05048.R5 9/12
C
14
4
3
15
2
13
ORIENTATION NOTCH
2
OUTPUT Connected to
Transmit/Receive Circuits
CONTINUITY
INPUT
OUTPUT
5
12
5
12
15
GND
E
Page 3
INPUT Connected to Line
From Outside World
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05048
420LB28 - 420LE60
Only One Name Means ProTek’Tion™
package information
420lE outline dimensions
dim
millimeters
inches
min
max
min
max
A
-
95.5
-
3.8
B
82.22
82.98
3.235
3.265
C
-
57.2
-
2.25
D
-
30.2
-
1.125
E
-
15.5
-
0.61
F
-
30.2
-
1.19
A
B
3
3
4
WARNING
4
LINE
GND
EQUIPMENT
GND
2
2
C
D
Terminal Strip
1
1
Adhesive Mylar Label
Terminal Screw
Mounting Hole
for #8 Screw
#6 Screws
F
E
ORDERING INFORMATION
base PART NUMBER
(xx = Voltage)
MARKING
420LBxx
Logo, Date Code, Terminal Designations and Part Number
420LExx
Logo, Date Code, Terminal Designations and Part Number
05048.R5 9/12
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05048
420LB28 - 420LE60
Only One Name Means ProTek’Tion™
company information
COMPANY PROFILE
In business more than 20 years, ProTek Devices™ is a privately-held company located in Tempe, Arizona, that offers a product line of transient voltage suppressors (TVS); avalanche breakdown diodes; steering diode TVS arrays and other surge suppressor component products.
These TVS devices protect electronic systems from the effects of lightning, electrostatic discharge (ESD), nuclear electromagnetic pulses
(NEMP), inductive switching and EMI / RFI. ProTek Devices also offers high performance interface and linear products that include analog
switches; multiplexers; LED drivers; audio control ICs; RF and related high frequency products. The analog devices work in a host of consumer; industrial; automotive and other applications.
CONTACT US
Corporate Headquarters
2929 South Fair Lane
Tempe, Arizona 85282
USA
By Telephone
General: 602-431-8101
Sales: & Marketing: 602-414-5109
Customer Service: 602-414-5114
Product Technical Support: 602-414-5107
By Fax
General: 602-431-2288
By E-mail:
Sales: sales@protekdevices.com
Customer Service: service@protekdevices.com
Technical Support: support@protekdevices.com
ProTek Devices (Asia Pacific) Pte. Ltd.
8 Ubi Road 2, #06-19
Zervex
Singapore - 408538
Tel: +65-67488312
Fax: +65-67488313
Web
www.protekdevices.com
COPYRIGHT © ProTek Devices 1998 - This literature is subject to all applicable copyright laws and is not for resale in any manner.
SPECIFICATIONS: ProTek reserves the right to change the electrical and or mechanical characteristics described herein without notice.
DESIGN CHANGES: ProTek reserves the right to discontinue product lines without notice and that the final judgement concerning selection and specifications is the buyer’s and that in furnishing engineering
and technical assistance. ProTek assumes no responsibility with respect to the selection or specifications of such products. ProTek makes no warranty, representation or guarantee regarding the suitability of
its products for any particular purpose, nor does ProTek assume any liability arising out of the application or use of any product or circuit and specifically disclaims any and all liability without limitation special,
consequential or incidental damages.
LIFE SUPPORT POLICY: ProTek Devices products are not authorized for use in life support systems without written consent from the factory.
05048.R5 9/12
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