2028

T
PL
IA
N
M
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Features
Applications
■ Size: 8 mm diameter, 10 mm length
■ Balanced and symmetrical TRIGARD®
■ Telecommunications electronics
■ Industrial electronics
■ Consumer electronics
■
■
■
■
■
design
High surge current rating
Stable breakdown throughout life
Long life
Fail-Short available
RoHS compliant*
2028 Series Long Life Heavy-Duty 3-Electrode Gas Discharge Tube
Characteristics
Test Methods per ITU-T K.12, IEEE C62.31 and IEC 61643-311 GDT standards.
Model No.
Characteristic
2028-23
DC Sparkover ±20 % @ 100 V/s
230 V
2028-25
2028-35
2028-42
250 V
350 V
420 V
< 450 V/550 V
< 650 V/750 V
< 700 V/800 V
< 850 V/950 V
< 850 V/950 V
< 1050 V/1150 V
(1)
Impulse Sparkover
100 V/µs (Typical/99 %)
1000 V/µs (Typical/99 %)
(1)
< 450 V/550 V
< 650 V/750 V
Impulse Sparkover voltage is defined as typical values of distribution.
Impulse Transverse Delay ............................... 1000 V/µs..........................................................< 75 ns
Insulation Resistance (IR) ............................... 100 V ................................................................> 1 GΩ
Capacitance..................................................... 1 MHz ...............................................................< 2 pF
Glow Voltage ................................................... 10 mA................................................................~ 70 V
Arc Voltage ...................................................... 1 A .....................................................................~ 10 V
DC Holdover Voltage (2) ................................... 135 V ................................................................< 150 ms
Impulse Discharge Current (3) .......................... 30,000 A, 8/20 µs .............................................. 1 operation
20,000 A, 8/20 µs .............................................. 10 operations
5,000 A, 10/350 µs ............................................ 1 operation
200 A, 10/1000 µs ............................................. 300 operations
20 A, 10/1000 µs ............................................... 1500 operations
Alternating Discharge Current ......................... 20 Arms, 1 second ............................................ 10 operations
Operating Temperature............................................................................................................... -55 to +85 °C
Climatic Category (IEC 60068-1)................................................................................................ 40 / 90 / 21
An optional Switch-Grade Fail-Short device is available. The optional Fail-Short assembly will activate at a temperature of 215 °C –
217 °C to provide a high conductive path to ground in case of a thermal overload. GDTs equipped with the optional Fail-Short device
should be soldered either manually at a temperature that is below the activation temperature of the Fail-Short mechanism, or using a
selective soldering process that does not exceed 210 °C.
Notes:
Network applied.
(3)
The Rated Impulse Discharge Current for TRIGARD® Gas Discharge Tubes is the total current equally divided between each line
to ground.
• At delivery AQL 0.65 Level II, DIN ISO 2859.
(2)
How to Order
2028 - nn - x n F LF
Model Number
Designator
Voltage (Divided by 10)
23 = 230 V 35 = 350 V
25 = 250 V 42 = 420 V
Leads
A = No Leads / Cassette Applications
C = 1.0 mm
Lead Shape
(See Product Dimension Drawings)
Fail-Short Option
Blank = Standard Product
F = With Fail-Short Mechanism
RoHS Compliancy
LF = RoHS Compliant Product
*RoHS Directive 2002/95/EC Jan. 27, 2003 including
annex and RoHS Recast 2011/65/EU June 8, 2011.
Specifications are subject to change without notice.
The device characteristics and parameters in this data
sheet can and do vary in different applications and
actual device performance may vary over time.
Users should verify actual device performance in their
specific applications.
2028 Series Long Life Heavy-Duty 3-Electrode Gas Discharge Tube
Product Dimensions
2028-xx-A
2028-xx-C2
14.0 ± 0.4
(.551 ± .016)
10.2 ± 0.3
(.402 ± .012)
10.2 ± 0.4
(.402 ± .016)
DIA.
2.5 ± 0.25
(.098 ± .010)
8.0 ± 0.2
(.315 ± .008)
DIA.
8.0 ± 0.2
(.315 ± .008)
DIA.
1.5 ± 0.3
(.059 ± .012)
15.0 ± 0.5
(.591 ± .020)
1.0 ± 0.04
(.040 ± .002)
DIA.
2028-xx-C
1.0 mm dia. lead wire
4.5 ± 0.4
(.177 ± .016)
4.4 ± 0.3
(.173 ± .012)
4.4 ± 0.3
(.173 ± .012)
73.0 ± 0.3
(2.87 ± .012)
10.2 ± 0.4
(.402 ± .016)
2028-xx-C2F
WITH FAIL-SHORT OPTION
8.51 ± 0.5
(.335 ± .020)
1.0 ± 0.04
(.040 ± .002)
DIA.
7.5 ± 0.4
(.295 ± .016)
8.0 ± 0.2
(.315 ± .008)
DIA.
11.9 ± 0.5
(.469 ± .020)
1.0 ± 0.04
(.040 ± .002)
DIA.
DIMENSIONS:
MM
(INCHES)
Packaging Specifications
Standard Packaging Quantity
Model
Bulk (Bag)
2028-XX-A
250
2028-XX-C
50
Tray
Box
1000
300
2028-XX-C2
100
900
2028-XX-C2F
100
900
REV. D 11/15
Specifications are subject to change without notice.
The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time.
Users should verify actual device performance in their specific applications.
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