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3-electrode GDT

BM 90/20
Part Number: 9297001
BM 90/20
  • 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)
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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
Impulse life
300 times, interval 2 min
50 A
Technology
 Gas discharge tube
Operating and storage temperature
 -40°C / +90°C
Failsafe mode
 Version with fail-safe: BM FL 90/20 (9297901)
Dimensions
 See diagram
Weight
 0.67 g
Standards compliance
 ITU-T K12 rec.
Certification
 UL Recognized / ROHS
RohS compliance
 Yes