Surge Arrester

Surge arrester designed as cable adapter for protecting coaxial systems such as video and camera systems from potential damage.
  • Plug-in surge protective adapter for easy retrofitting
  • Directly plugs into coaxial terminal equipment
  • Integrated indirect shield earthing avoids leakage pickups


UGKF BNC shielded surge arresters are plugged into coaxial terminal equipment or connections. Common applications include the protection of outdoor video surveillance systems or video control centres. In order to avoid being effected by leakage pickups, the cable shield is earthed indirectly via a gas discharge tube. The arrester entries are used as sockets and the protected outputs as plugs.
Devices for video systems with a higher supply voltage or sockets on both ends are available on request.

We recommend to use DGA BNC VC... arresters for easy installation on a DIN rail. These space-saving surge arresters have BNC sockets and protect video and camera systems. Two versions are available: DGA BNC VCD with direct connection of the cable shield to the earth potential or DGA BNC VCID with indirect connection of the cable shield. The arresters are earthed via the DIN rail.

Detail 1

UGKF BNC can be directly plugged into the interfaces of terminal equipment.

Detail 2

UL listing for country-specific use.

Detail 3

DGA BNC VC ... can be easily adapted due to BNC connection.

Detail 4

DGA BNC VC... can be easily mounted on DIN rails or walls.




Basic circuit diagram UGKF BNCDimension drawing UGKF BNC

Two-stage surge arrester with indirect shield earthing for protecting video cameras and Arcnet with BNC connection to avoid leakage pickups.


Part No.
SPD class
Nominal voltage (UN)
Max. continuous operating voltage (d.c.) (UC)
Nominal current (IL)
C2 Nominal discharge current (8/20 µs) line-shield (In)
C2 Nominal discharge current (8/20 µs) shield-PG (In)
Voltage protection level line-shield for In C2 (UP)
Voltage protection level line-shield at 1 kV/µs C3 (UP)
Voltage protection level shield-PG at 1 kV/µs C3 (Up)
Insertion loss at 300 MHz (50 ohms)
Return loss at 40 MHz (50 ohms)
Insertion loss at 265 MHz (75 ohms)
Return loss at 40 MHz (75 ohms)
Characteristic impedance (Z)
Series resistance per line
Capacitance line-shield (C)
Operating temperature range (TU)
Connection (input / output)
Earthing via
Shield earthing
Test standards
Part No.