Gas Discharge Tubes
High Voltage Series
High Voltage Series
Littelfuse Circuit Protection 8mm 2Pole high voltage
GDTs (ceramic gas discharge tubes), are commonly
used to help protect high voltage circuits.
Littelfuse Circuit Protection high voltage GDTs offer a
high level of surge protection, low capacitance and a
broad array of break over voltage levels, making them
suitable for applications such as branch circuits,
medical electronics and surge protection on power
lines. Littelfuse Circuit Protection GDTs can help
equipment meet the most stringent regulatory
standards.
Benefits:
Features:
2Pole, 8mm Axial and non Leaded devices
Broad voltage range from 800-4000V
Low capacitance
Crowbar overvoltage protection
UL 1449 recognized
RoHS compliant
Non-radioactive materials
Capable up to 10kA 8/20 μs surge
Helps provide overvoltage fault protection
against high energy surges
Applications:
Power Supplies
Commercial Installations
Medical Electronics
Industrial Equipment and Machinery
Appliance (Hi-Pot)
© 2016 Littelfuse,Inc
Specifications are subject to change without notice
Revised July 26, 2016
Document:SCD28143
SCD28143
Status: Released
Rev. A Date: JULY 26 1016
1
Gas Discharge Tubes
High Voltage Series
High Voltage Series
Device Voltage Ratings, Surge Rating, Capacitance, Insulation Resistance, UL
Im pulse
Discharge
Current, 8/20us
DC
Sparkover
Im pulse
Sparkover
Insulation
Resistance
Capacitance
± 20%
@100V/s (V)
100 V/μs
(V)
500Vdc
（MΩ）
1MHz (pF)
10 hits
1 hit
10 hits,
1S
1 hit, 9
cycles
UL1449
#E332226
GTCX28-801M-R05
800
1400
≥ 10,000
≤1
5kA
10kA
5A
N/A
All Devices
GTCX28-102M-R03
1000
1700
≥ 10,000
≤1
3KA
10kA
1A
5A
All Devices
GTCX28-122M-R03
1200
1900
≥ 10,000
≤1
3KA
10kA
1A
5A
All Devices
GTCX28-152L-R03
1500(± 15%)
2200
≥ 10,000
≤1
3KA
10kA
1A
5A
All Devices
GTCX28-212M-R03
2100
2700
≥ 10,000
≤1
3KA
10kA
1A
5A
All Devices
GTCX28-242M-R03
2400
3300
≥ 10,000
≤1
3KA
10kA
1A
5A
All Devices
GTCX28-252M-R03
2500
3500
≥ 10,000
≤1
3KA
10kA
1A
5A
All Devices
GTCX28-272L-R03
2700 (± 15%)
3700
≥ 10,000
≤1
3KA
10kA
1A
5A
All Devices
GTCX28-302M-R03
3000
4000
≥ 10,000
≤1
3KA
10kA
1A
5A
All Devices
GTCX28-312L-R03
3100 (± 15%)
4300
≥ 10,000
≤1
3KA
10kA
1A
5A
All Devices
GTCX28-362M-R03
3600
4600
≥ 10,000
≤1
3KA
10kA
1A
5A
All Devices
GTCX28-402M-R03
4000
5000
≥ 10,000
≤1
3KA
10kA
1A
5A
All Devices
Part Description
AC Discharge
Current, 50 Hz
UL Rating
Product Dimensions:
Axial Leads (GTCA28-XXXX-R0X)
No Leads (GTCN28-XXXX-R0X)
© 2016 Littelfuse,Inc
Specifications are subject to change without notice
Revised July 26, 2016
Document:SCD28143
SCD28143
Status: Released
Rev. A Date: JULY 26 1016
2
Gas Discharge Tubes
High Voltage Series
High Voltage Series
DIMENSIONS = MILLIMETERS [INCHES]
General Characteristics:
No Radioactive Materials
Storage temperature:
Operating temperature:
Electrode:
Lead wire:
-40°C … +90°C
-40°C … +90°C
Fe-Ni alloy, Ni plated
Tin Plated Copper
Materials Information
ROHS Compliant
ELV Compliant
Pb-Free
Packaging Information
Part Description
Axial Leads: GTCA28-XXXX-R0X
No Leads: GTCN28-XXXM-R0X
Tray / Reel
Standard Package
100
1000
100
2000
Part Numbering System
Example Part Number: GTCA28-212M-R03
GT =
C=
A=
2=
8=
212=
M=
Gas Tube
Ceramic
A= Axial Leads
2 Electrode device
8mm Diameter
DC Spark Over Voltage of 2100V (at 100V/s)
Tolerance of 20% on DC Spark Over Voltage
R=
03 =
Product Family Designator
Surge rating: 8x20Es 3kA 10 times
© 2016 Littelfuse,Inc
Specifications are subject to change without notice
Revised July 26, 2016
Document:SCD28143
SCD28143
Status: Released
Rev. A Date: JULY 26 1016
3
Gas Discharge Tubes
High Voltage Series
High Voltage Series
Part Marking Reference
Guide
Example Part Marking:
212 R03 HB
=
212 =
Manufacturer’ Mark
Voltage Designator (212 = 2100V)
R03 =
HB =
Product Family Designator - Surge Current 3kA (8x20µs 10 hits)
Year and Week of Manufacture
Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, lifesaving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack
of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse
product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable
Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by
Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale,
unless otherwise agreed by Littelfuse.
© 2016 Littelfuse,Inc
Specifications are subject to change without notice
Revised July 26, 2016
Document:SCD28143
SCD28143
Status: Released
Rev. A Date: JULY 26 1016
4
