Gas Discharge Tubes (GDT) from Littelfuse, Inc.

High Voltage GDT -- CG42.5SM

High Voltage GDT -- CG42.5SM -- View Larger Image
High Voltage GDT -- CG42.5SM-Image

CG4 Series high voltage miniature SMT gas discharge tubes provide high levels of protection against fast rising transients caused by lightning disturbances. These GDTs are high voltage (800V - 3000V) devices designed for over-voltage protection for high isolation applications.


  • High DC breakdown voltage 800V to 3000 V
  • Surface mount form factor with two squared terminals
  • Medium surge capability 3kA (8/20µs)
  • Miniature footprint
  • Lead-free and RoHS compliant
  • UL Recognized


  • Air conditioning
  • Variable frequency drives (VFDs) / inverters
  • High voltage power supply
  • Medical electronics such as X-ray machines and NMR equipment
  • Set-top boxes
  • High voltage test equipment


Product Category
Gas Discharge Tubes (GDT)
Capacitance Range
0.8000 pF
Rated Voltage
Rated Voltage
Rated Current