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Gas Discharge Tubes (GDT)

gas discharge tubeRaychem Circuit Protection GDTs are commonly used to help protect sensitive telecom equipment such as power lines, communication lines, signal lines and data transmission lines from damage caused by transient surge voltages that typically result from lightning strikes and equipment switching operations.
Product Series GTCx26 GTCx28-
xxxx-P15 		GTCA28-
xxxx-P0x 		GTCx36 GTCx37 GTCx38-
xxx-x10*
RoHS/ELV VersionRoHS Compliant
Description Miniature Two Electrode Series High Surge Two Electrode Series High Voltage Two Electrode Series Miniature Three Electrode Series Three Electrode 7.5mm Diameter Series Three Electrode
Number of Electrodes: 2 2 2 3 3 3
Diameter (mm):
 6mm 8mm 8mm 6mm 7mm 8mm
DC Sparkover Voltage (V): 100 | 230 | 350 90-350 75-800 | 1000-4000 90-350 90-550 90-500
Impulse Discharge Current (8x20us) 10 Hits (kA): 2.5  | 5 15 3 | 5 5  | 10 10 10 | 20
Lead Type: Axial Leaded | Without Axial Leaded | Without Axial Leaded | Without Radial Leaded | Without Radial Leaded | T-lead Radial Leaded | Without
Fail-Short Device: NO YES & NO NO YES & NO YES & NO YES & NO*
Capacitance @ 1MHz (pF): <=1.0 <=1.5 | <=3.0 <=1.0 <=3.0 <=3.0 <=3.0

RoHS Compliant RoHS Compliant
* P and Q series available; the fail-short device is on the top for the Q versions and on the bottom for the P versions.

 
Part Numbering System for Gas Discharge Tubes


Two Electrode GDT

GDT part numbering for Two Electrodes

Three Electrode GDT

GDT part numbering for Three Electrodes

Agency Recognition for Gas Discharge Tubes*
Standard Title File Number
UL Transient Voltage Surge Suppressors   E179610

 

 

*Please note, not all GDT devices are currently UL listed.
Please check the 2008 Catalog and/or device data sheets
to determine if a particular device has a UL listing.

Marking and Packaging for Gas Discharge Tubes


Parts are packed 100 pieces in a plastic tray or 200 pieces in a vacuum bag, ten trays or five bags (1,000 pieces) to a standard box. Standard packaging is in trays. Vacuum bag packaging is available upon request. Add "-B" at the end of the part number for parts packaged in vacuum bags.
 
Marking Reference Guide for Gas Discharge Tubes


Example:
Raychem GDT Marking

  • Operation beyond the maximum ratings or improper use may result in device damage and possible electrical arcing and flame.
  • The devices are intended for protection against occasional overvoltage fault conditions and should not be used when repeated fault conditions or prolonged trip events are anticipated.
  • Device performance can be impacted negatively if devices are handled in a manner inconsistent with recommended electronic, thermal, and mechanical procedures for electronic components.