3-electrode GDT

BMSQ CMS 90/20
Part Number: 9299201
BMSQ CMS 90/20
  • 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
+/- 20%
Maximum impulse sparkover voltage (1kV/µs)
<560 V
Nominal discharge current
10 x 8/20µs impulses
In 10 kA
Total Maximum discharge current
max. total withstand @ 8/20 µs
Imax Total 25 kA
Impulse current by pole
max. withstand 10/350µs by pole
Iimp 2 kA
Impulse discharge current
10/350µs - 1 time
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
R = 300 ohms in serie R = 150 ohms; 100nF en parrallel
>60 V
Gas discharge tube
Surface Mounting Device
Operating and storage temperature
-40°C / +90°C
Tape & Reel
BMSQ CMS (T&R) 90/20 : 929920101
See diagram
0.72 g
Standards compliance
ITU-T K12 rec.
UL Recognized / ROHS
RohS compliance