3-electrode GDT

BT 90/20
Part Number: 9290001
BT 90/20
  • 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)
  • Available version with fail-safe (BT C series)
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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)
72-108 V
DC spark voltage tolerance
 +/- 20%
Maximum impulse sparkover voltage (1kV/µs)
 <620 V
Nominal discharge current
10 x 8/20µs impulses
 In 20 kA
Total Maximum discharge current
max. total withstand @ 8/20 µs
Imax Total 25 kA
Impulse discharge current
10/350µs - 1 time
 4 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
R = 300 ohms in serie R = 150 ohms; 100nF en parrallel
 >70 V
Technology
 Gas discharge tube
Operating and storage temperature
 -40°C / +90°C
Failsafe mode
 With fail-safe: BT C 90/20 (9291001)
Dimensions
 See diagram
Weight
 2.31 g
Standards compliance
 ITU-T K12 rec.
RohS compliance
 Yes