3-electrode GDT
BMSQ CMS FL (T&R) 230/20
Part Number: 929805701
  • The smallest 3-electrode GDT
  • No radioactive
  • Used in connector blocks and adapted holders
  • SMD compatible
  • Available in version "Square SMD" (anti-rolling)
  • Available with fail safe (BM C or BM FL series)
  • Available in version for PCB mounting (BM S 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
Max. capacitance C <0.5 pF
Insulation resistance IR ≥10 GOhms
Glow-to-arc transition current 0.5 A
Glow voltage ≤ 100 V
AC discharge current (50Hz) 10 A
DC Holdover voltage >80 V
Technology Gas discharge tube
Operating and storage temperature -40°C / +90°C
Failsafe mode Fail-safe
Tape&Reel Version Standard version
Dimensions See diagram
Standards compliance ITU-T K12 rec.
Certification UL
RohS compliance Yes