Broadcast-Grade BNC Jack for 75 Ohm Coax
The 031-70547-12G: It ships as a kit with the connector body and a matching ferrule, ready for field termination. The 75 Ohm impedance and 12 GHz maximum frequency target it squarely at broadcast video, high-definition serial digital interface (HD-SDI), and CCTV applications where signal integrity at high data rates matters.
What the Key Specs Mean for the Install
The 75 Ohm impedance is not a typo — this is a video-grade BNC, not the 50 Ohm version common in data comms. Mating it with a 50 Ohm cable or connector will create an impedance mismatch that degrades return loss above a few hundred megahertz. The 12 GHz bandwidth is well beyond the 3 GHz ceiling of most HD-SDI links, so this connector won't be the bottleneck in a 12G-SDI path.
The kit includes the ferrule, so you don't need to source it separately. The specified Belden 4694R is a precision 75 Ohm broadcast coax. If your cable is a different 75 Ohm coax with similar dielectric diameter, the crimp die and strip dimensions will need to be verified against the manufacturer's tooling guide.
Build and Environment
Brass body with nickel finish, PTFE dielectric, and a silver housing. The bayonet lock gives a positive quick-connect that holds under moderate vibration — not rated for continuous flex, but fine for a patch panel or camera connection that gets cycled occasionally.