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What is a Gas Discharge Tube?

A gas discharge tube, or GDT, is a glass-enclosed device that is sealed and that contains a special gas mixture which is trapped between two electrodes. Gas discharge tubes conduct electrical current after they become ionized by a high voltage spike, can conduct a relatively high amount of current for their size and can handle some very large transients or several smaller transients. Gas discharge tubes also take a long time to trigger, which permits a higher voltage spike to pass through before conducting a significant amount of current.

Types of Gas Discharge Tubes

There are many different kinds of gas discharge tubes and at Future Electronics we stock many of the most common types categorized by Minimum Breakdown Voltage, Maximum Breakdown Voltage, Nominal AC Discharge Current, Packaging type and Impulse Discharge Current. The parametric filters on our website can help refine your search results depending on the required specifications.

The most common sizes for Minimum Breakdown Voltage are 72 V, 184 V, and 280 V. We also carry gas discharge tubes with Minimum Breakdown Voltage as high as 4000 V. Impulse Discharge Current can be between 1 kA and 25 kA, with the most common gas discharge tubes having an Impulse Discharge Current of 5 kA, 10 kA and 20 kA.

Gas Discharge Tubes from Future Electronics

Future Electronics has a full selection of surge arrester gas discharge tubes of all types and sizes when looking for gas discharge tube protection for a circuit. Simply choose from the gas discharge tube technical attributes below and your search results will quickly be narrowed to match your specific gas discharge tube application needs.

We deal with Epcos, Littelfuse, Maida Development and Raychem as manufacturers. You can easily refine your gas discharge tube product search results by clicking your preferred gas discharge tube brand below from our list of manufacturers.

Applications for Gas Discharge Tubes:

Due to their very low capacitance, gas discharge tubes are commonly used on high frequency lines, like in telecommunications equipment. They can also be used in industrial and consumer electronics, such as in surge protectors and alarm systems. Other applications include instrumentation circuits, power supplies and medical electronics.

Choosing the Right Gas Discharge Tube:

When you are looking for the right gas discharge tubes, with the FutureElectronics.com parametric search, you can filter the results by various attributes: by Minimum Breakdown Voltage (60 V, 72 V, 184 V, 280 V,…), Maximum Breakdown Voltage (between 75 V and 6000 V) and Impulse Discharge Current (from 1 kA to 25 kA) to name a few. You will be able to find the right surge arrester gas discharge tube protection for any circuit.

Gas Discharge Tubes in Production Ready Packaging or R&D Quantities

If the quantity of gas discharge tubes required is less than a full reel, we offer customers many of our gas discharge tube products in tray quantities quantities that will avoid unneeded surplus.

In addition, Future Electronics offers clients a unique bonded inventory program that is designed to eliminate potential problems that may arise from an unpredictable supply of products containing raw metals and products with erratic or long lead times. Talk with your nearest Future Electronics branch and find out more on how you and your company can avoid possible shortages.



Gas Discharge Tubes By Manufacturer Name:

Featured Gas Discharge Tube Products


Manufacturer Part Number Description
EpcosB88069X4120T902B88069 Series Thyristor Surge Protector
EpcosB88069X210S102680-1000 Vdc Spark-Over 10 kA Impulse Discharge 2-Electrode Surge Arrester
EpcosB88069X180S102EC75X Series 75 Vdc Spark Over 10 kA 1 pF 2-Electrode Surge Arrester
EpcosB88069X2250S102230 Vdc Spark-Over 20 kA Impulse Discharge 2-Electrode Surge Arrester
EpcosB88069X720S10290 Vdc Spark-Over 15 kA Impulse Discharge 2-Electrode Surge Arrester
EpcosB88069X2040S102B88069X2040S102 Series 470 V 5 kA 2-Electrode-Arrester Surge Arrester
EpcosB88069X780S1022-Electrode Arrester
EpcosB88069X8740B502230 Vdc Spark-Over 25 kA Impulse Discharge 3-Electrode Surge Arrester
LittelfuseCG90LCG/CG2 Series 108 V 20 kA Axial Through Hole Two Electrode Gas Discharge Tube
LittelfuseCG2230LCG/CG2 Series 265 V 20 kA Axial Through Hole Two Electrode Gas Discharge Tube
LittelfuseCG590MSCG5 MS Series 108 V 5 kA Surface Mount 2 Electrode Gas Discharge Tube
LittelfuseCG75LCG/CG2 Series 90 V 20 kA Axial Through Hole Two Electrode Gas Discharge Tube
LittelfuseCG21000LCG/CG2 Series 1150 V 10 kA Axial Through Hole Two Electrode Gas Discharge Tube
LittelfuseCG2300LCG/CG2 Series 345 V 20 kA Axial Through Hole Two Electrode Gas Discharge Tube
LittelfuseCG2470LCG/CG2 Series 540 V 20 kA Axial Through Hole Two Electrode Gas Discharge Tube
LittelfuseCG33.0LCG3 Series 3600 V Axial Through Hole 2 Electrode High Voltage Surge Arrester
LittelfuseCG32.5LCG3 Series 3000 V Axial Through Hole 2 Electrode High Voltage Surge Arrester
LittelfuseAC240LAC Series 715 V 10 kA Axial Through Hole Two Electrode AC Line Protector
LittelfuseCG2230CG/CG2 Series 265 V 20 kA Core Two Electrode Gas Discharge Tube
Maida DevelopmentD61ZOV271RA43
RaychemGTCR38-351M-R10GTCR38 Series 350 V 10 kA 10 A Through Hole Gas Discharge Tube
RaychemGTCC23-141M-R01-2GTCC23 Series 140 V 1 kA 100 A Surface Mount Gas Discharge Tube
RaychemGTCC23-151M-R01-2GTCC23 Series 150 V 1 kA 100 A Surface Mount Gas Discharge Tube
RaychemGTCC23-201M-R01-2GTCC23 Series 200 V 1 kA 100 A Surface Mount Gas Discharge Tube
RaychemGTCC23-231M-R01-2GTCC23 Series 230 V 1 kA 100 A Surface Mount Gas Discharge Tube

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