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Three-Electrode

Our three-electrode spark gaps are fire-on-command devices. These comprise hermetically sealed gas-filled switches and are available with DC hold-off voltages ranging from 3 to 50 kV.Three-electrode spark gap applications include medical lithotripsy, crowbar circuits, high di/dt switches for laser firing and high energy switches.

GXG Series

The GXG Series of triggered three-electrode spark gaps are gas discharge tubes, hermetically sealed in a ceramic/metal envelope. Tubes with a DC hold-off voltage in the standard range 15 to 50 kV are available. Device breakdown voltage is signified by numerals (expressed in hundreds of volts) following the series type identifier: e.g. GXG350L has a 35 kV DC hold-off voltage capability. The operational voltage range for the GXG Series is 40% to 80% of DC hold-off voltage.

Typical Applications

  • Medical lithotripsy 
  • Crowbar circuits 
  • High di/dt switching 
  • High voltage switches for laser firing 
  • High energy switches


GXT Series

The GXT Series of triggered three-electrode spark gaps are gas discharge tubes, hermetically sealed in a ceramic/metal envelope. Tubes with a DC hold-off voltage in the standard range 3 to 25 kV are available.

If you require a higher voltage range please use the enquiry form for more information. Device breakdown voltage is signified by numerals (expressed in hundreds of volts) following the series type identifier: e.g. GXT250B has a 25 kV DC hold-off voltage capability. The operational voltage range for the GXT Series is 40% to 80% of DC hold-off voltage.

Typical Applications

  • Medical lithotripsy 
  • Crowbar circuits 
  • High di/dt switching 
  • High voltage switches for laser firing 
  • High energy switches 
  • General switching applications


The 3 electrode preamble can be downloaded via this link