Compare list full


Gas discharge tubes (GDT) are sealed glass tubes containing a pair of electrodes and filled with a gas that only conducts when a high voltage is applied across the electrodes. When a voltage spike appears across the device the gas is ionised (becomes a conducting gas plasma) which short-circuits the spike energy away. Gas discharge tubes are often used to protect sensitive circuit inputs from potentially damaging interference voltage transients. The large amount of energy that can be dispersed by gas discharge tubes makes them a good choice for lightning surge protection, particularly for telecommunications equipment.

### Why use a gas discharge tube?

Most commonly used as a surge protection aid, gas discharge tubes are key in limiting surges in voltage across both electronic and electrical circuits. GDTs are great at handling high current feeds whilst also maintaining low capacitance and having excellent insulation resistance.



Shop our range of Gas Discharge Tubes supplies & accessories. Free Next Day Delivery. Browse our latest Gas Discharge Tubes offers.

Gas Discharge Tubes | GDT Surge Protection | RS

Gas Discharge Tubes

Buy from our selection of Bourns Gas Discharge Tubes. Free Delivery Available.

Bourns Gas Discharge Tubes | RS

Shop our range of Epcos Gas Discharge Tubes. Free Delivery Available.

Epcos Gas Discharge Tubes | RS

Shop our range of Littelfuse Gas Discharge Tubes. Free Delivery Available.

Littelfuse Gas Discharge Tubes

Popular Searches