Features
Applications
■ Size: 8 mm diameter, 10 mm length
■ Telecommunications electronics
■ Industrial electronics
■ Consumer electronics
■ Balanced and symmetrical TRIGARD®
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
2028-25
2028-35
2028-42
DC Sparkover 2ꢀ ꢁ ꢂ 1ꢀꢀ ꢃVs
Impulse Sparkover
23ꢀ ꢃ
25ꢀ ꢃ
35ꢀ ꢃ
42ꢀ ꢃ
(1)
1ꢀꢀ ꢃVµs (TypicalV99 ꢁ)
1ꢀꢀꢀ ꢃVµs (TypicalV99 ꢁ)
Impulse Sparkover voltage is defined as typical values of distribution.
< 45ꢀ ꢃV55ꢀ ꢃ
< 65ꢀ ꢃV75ꢀ ꢃ
< 45ꢀ ꢃV55ꢀ ꢃ
< 65ꢀ ꢃV75ꢀ ꢃ
< 7ꢀꢀ ꢃV8ꢀꢀ ꢃ
< 85ꢀ ꢃV95ꢀ ꢃ
< 85ꢀ ꢃV95ꢀ ꢃ
< 1ꢀ5ꢀ ꢃV115ꢀ ꢃ
(1)
Impulse Transverse Delay............................... 1ꢀꢀꢀ ꢃVµs..........................................................< 75 ns
Insulation Resistance (IR) ............................... 1ꢀꢀ ꢃ ................................................................> 1 GΩ
Capacitance..................................................... 1 MHz ...............................................................< 2 pF
Glow ꢃoltage ................................................... 1ꢀ mA................................................................~ 7ꢀ ꢃ
Arc ꢃoltage...................................................... 1 A.....................................................................~ 1ꢀ ꢃ
(2)
DC Holdover ꢃoltage ................................... 135 ꢃ ................................................................< 15ꢀ ms
(3)
Impulse Discharge Current .......................... 3ꢀ,ꢀꢀꢀ A, 8V2ꢀ µs.............................................. 1 operation
2ꢀ,ꢀꢀꢀ A, 8V2ꢀ µs.............................................. 1ꢀ operations
5,ꢀꢀꢀ A, 1ꢀV35ꢀ µs............................................ 1 operation
2ꢀꢀ A, 1ꢀV1ꢀꢀꢀ µs............................................. 3ꢀꢀ operations
2ꢀ A, 1ꢀV1ꢀꢀꢀ µs............................................... 15ꢀꢀ operations
Alternating Discharge Current......................... 2ꢀ Arms, 1 second............................................ 1ꢀ operations
Operating Temperature............................................................................................................... -55 to +85 °C
Climatic Category (IEC 6ꢀꢀ68-1)................................................................................................ 4ꢀ V 9ꢀ V 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 21ꢀ °C.
Notes:
(2)
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 ꢀ.65 Level II, DIN ISO 2859.
How to Order
2028 - nn - x n F LF
Model Number
Designator
ꢃoltage (Divided by 1ꢀ)
23 = 23ꢀ ꢃ 35 = 35ꢀ ꢃ
25 = 25ꢀ ꢃ 42 = 42ꢀ ꢃ
Leads
A = No Leads V Cassette Applications
C = 1.ꢀ mm
Lead Shape
(See Product Dimension Drawings)
*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.
Fail-Short Option
Blank = Standard Product
F = With Fail-Short Mechanism
RoHS Compliancy
LF = RoHS Compliant Product
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