3-electrode GDT

BMSQ CMS 90/20
BMSQ CMS 90/20
Part Number: 9299201
  • The smallest 3-electrode GDT
  • No radioactive
  • Square electrod "anti-rolling"
  • Surface Mounting Device
  • ITU-K12 compliant
  • UL certified
  • Available in Tape&Reel packaging (BMSQ CMS (T&R))

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) 72-108 V
DC spark voltage tolerance (100V/s) +/- 20%
Maximum impulse sparkover voltage (1kV/µs) <560 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
Technology Gas discharge tube
Mounting Surface Mounting Device
Operating and storage temperature -40°C / +90°C
Tape & Reel BMSQ CMS (T&R) 90/20 : 929920101
Dimensions See diagram
Weight 0.72 g
Standards compliance ITU-T K12 rec.
Certification UL Recognized / ROHS
RohS compliance Yes