3-electrode GDT
BT 230/20
BT 230/20
Part Number: 9290057
  • 3-electrode GDT
  • No radiactive
  • Use in connection blocks and holders
  • ITU-K12 compliant
  • Available in version for PCB mounting (BT S and BT R series)

The BT serie is a range of 3-electrode Gas Discharge Tubes designed by CITEL with ceramic and non-radioactive technology. This range is available without leads (contact on side electrodes: BT type) to fit in standard connectors blocks or holders. Versions with leads, radial leads (BTR version) or axial leads (BTS version) for PCB mounting. BT gas tubes can be supply with a fail-safe mechanism (BTC version). BT are available in a large range of DC sparkover voltages and are in compliance with international standards (ITU-T rec. K12).


DC sparkover voltage (100V/s) 184-276 V
Dc spark voltage tolerance (100V/s) +/- 20%
Maximum impulse sparkover voltage (1kV/µs) ≤680 V
Nominal discharge current In 20 kA
Total Maximum discharge current Imax Total 25 kA
Max. capacitance C <0.9 pF
Insulation resistance IR ≥10 GOhms
Arc Voltage ≤ 25 V
Glow-to-arc transition current 0.5 A
Glow voltage ≤ 100 V
AC discharge current (50Hz) 20 A
DC Holdover voltage >80 V
Technology Gas discharge tube
Operating and storage temperature -40°C / +90°C
Dimensions See diagram
Standards compliance ITU-T K12 rec.
Certification UL
RohS compliance Yes