cooper bussmann

Surge Protection Made Simple™ for Coaxial Data Cables - DIN-Rail Mount


UL Listed 497B DIN-Rail Mount Surge Protective Device for BNC Connector Cable Systems

The Cooper Bussmann BSPD5BNCDD and BSPD5BNCDI two-stage DIN-Rail mounted surge arresters are for protecting coaxial cable-connected systems (such as video and camera systems) from potential damage. The BSPD5BNCDD features direct (VCD) shield connection while the BSPD5BNCDI features indirect shield connection (VCID) to prevent leakage pickups.
The BSPD5BNCDD and BSPD5BNCDI shielded surge arresters are mounted on the supplied bracket with cable lug or mounted on a rack mounted DIN-Rail with suitable grounding. BNC connector terminated data or video signal cables are plugged into surge arrester with the equipment plugged into the protected side.
Common applications include protecting outdoor video surveillance systems or video control centers or coaxial data lines. For BSPD5BNCDI, the cable shield is indirectly grounded via a gas discharge tube to avoid being influenced by leakage pickups.
• UL 497B Listed
• Plug-in surge protective device for easy retrofitting
• The space-saving surge arrester with BNC socket is mounted on supplied rail terminal lug or standard 35mm DIN-Rail
• Integrated direct or indirect shield grounding avoids leakage pickups
• Easily adaptable due to BNC sockets

Circuit Diagrams

Technical Data
Return loss at 300MHz ≥8dB ≥10dB
Capacitance shield-PG (C) ≤20pF
Voltage protection level shield-PG for In C2 (Up) ≤650V
Voltage protection level shield-PG at 1kV/µs C3 (Up) ≤600V
Nominal voltage (UN) 5V
Max. continuous operating DC voltage (UC) 6.4V
Nominal current (IL) 0.1A
C2 Nominal discharge current (8/20µs) shield-PG (In) 10kA
C2 Nominal discharge current (8/20µs) line-shield (In) 5kA
Voltage protection level line-shield for In  C2 (Up) ≤35V
Voltage protection level line-shield at 1kV/µs C3 (Up) ≤13V
Frequency range 0-300MHz
Insertion loss at 160MHz ≤0.4dB
Insertion loss at 300MHz ≤3dB
Return loss at 130MHz ≥20dB
Impedance (Z) 50Ω
Series impedance per line 4.7Ω
Capacitance line-shield (C) ≤25pF
Operating temperature range -40°C to +80°C
Degree of protection IP10
For mounting on 35mm DIN-Rails per EN 60715
Connection (input / output) BNC Socket (female) / BNC Socket (female)
Grounding Via 35mm DIN-Rail per EN 60715
Enclosure material Zinc die casting
Color Bare surface
Test standards IEC 61643-21 / EN 61643-21
Agency Information UL 497B

DIN-Rail BNC SPD Applications
Bus Systems and Measuring, and Control Technology
Control Net X X
Melsec Net 2 X X
Data Networks
Arcnet X X
Video Systems
Video (coax) X X

Direct vs. Indirect Shielding - Application Example Apply the BSPD5BNCDD (direct shield) at the equipment location and apply the BSPD5BNCDI (indirect shield) near exterior protected equipment. The indirect shield grounding at the exterior device will help avoid picking up leakage currents that can degrade signal quality while providing surge protection when needed. See illustration below for installation locations.

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