3-electrode GDT

BM 230/20
BM 230/20
Part Number: 9297057
  • The smallest 3-electrode GDT
  • No radioactive
  • Used in connector blocks and adapted holders
  • UL certified
  • Available in version for surface mounting (BM CMS)
  • Avaiable in version with square electrode (BMSQ)
  • Available in version for PCB mounting (BM S series)
  • Available version with fail-safe (BM FL series)

CITEL BM surge arresters are 3-electrode gas discharge tubes designed in ceramic technology and created to protect telecommunication or computer equipment, The reduced size of the BM series enables the implementation in limited space applications (small connector blocks...), SMD mounting (BM CMS type) or PCB mounting (with lead termination : BMS). BM could be provide with external fail-safe mechanism (BMC type) and is available in several DC sparkover voltages.


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 10 kA
Total Maximum discharge current Imax Total 25 kA
Impulse current by pole Iimp 2 kA
Impulse discharge current 2 kA
Max. capacitance C <0.5 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) 10 A
DC Holdover voltage >80 V
Impulse life 50 A
Technology Gas discharge tube
Operating and storage temperature -40°C / +90°C
Failsafe mode Version with fail-safe: BM FL 230/20 (9297957)
Dimensions See diagram
Weight 0.67 g
Standards compliance ITU-T K12 rec.
Certification UL Recognized / ROHS
RohS compliance Yes