Class I 50kA Spark Gap Surge Arrester


-Class I 50kA surge arresterwith remote control contacts,
- With indication window,
- Compact design,
-Used in the lightning protection zones concept at boundary LPZ0B-LPZ1,
-The core parts are spark gap with high discharge capacity,
-35mm2 DIN-rail in accordance with EN 50022/DIN46277-3,
-Low residual voltage and quick response.
-Protection mode: L-N / L-PE.
1.Dimension of surge arresterFV50B/1-xxxS

2.Electrical parametersofsurge arresterFV25B/1-xxxS
Model No.   FV50B/1-150S FV50B/1-255S FV50B/1-275S FV20C/1-320S FV20C/1-385S
Test class according to IEC61643-11:2011 I
Type of Network TT-TN-IT
Nominal voltage UN 110/220V 220/380V
Rated Voltage
(Max. Cont. Operating Voltage)
Uc 150VAC / 200VDC 255VAC / 320VDC 275VAC / 350VDC 320VAC / 410VDC 385VAC / 505VDC
Maximum discharge current (8/20μs) Imax 40kA 40kA 40kA 40kA 40kA
Nominal discharge current (8/20μs) In 20kA 20kA 20kA 20kA 20kA
Voltage protective level at In Up ≤1.2kV ≤1.8kV ≤1.8kV 2.0kV ≤2.0kV
Isolation resistance Risol >102 >102 >102 >102 >102
Response time tA 100ns 100ns 100ns 100ns 100ns
Recommended back-up fuse 500A
I/O Connections By screw terminal:10-35mm2
By connection bus
Mounting Symmetrical rail (EN50022/DIN46277-3)
Operation temperature range / RH -25~+85 /95%
Degree of protection IP20
Housing material UL94V0
Disconnection indicator Mechanical indicator
Remote control contact Yes
Color gray

3. Test record photo

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