Gas Discharge Tubes

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Bourns' gas discharge tubes (GDTs) are used to protect personnel and sensitive equipment from hazardous transient voltages. The GDTs are used in primary and secondary applications and can withstand multiple applications of high surge current energy in excess of 25KA. Bourns offers standard 8mm GDTs and a 5mm mini series GDT in two and three electrode versions featuring long service life and low capacitance and insertion loss. An optional, proprietary Switch-Grade Failshort is offered on the three electrode version to provide superior protection from thermal runaway. Bourns GDTs meet or exceed virtually all industry specifications regulating the use of gas discharge tubes.


  • Ideal for board-level protection of signaling circuits
  • High surge-current rating
  • Low insertion loss with stable breakdown throughout the life
  • UL recognized (RoHS compliant versions available)
  • Surface-mount available for automated assembly
  • High energy handling for severe exposure applications
  • Very low loss characteristics for high speed applications
  • Long surge life in harsh environments


  • Industrial Electronics
  • Commercial Electronics
  • Signaling Systems
  • Aircraft and Military Electronics
  • Communications Systems (Access Equipment, Customer Premises Equipment, and Central Office)