The 031-70526-12: At 12 GHz max frequency, it covers HD-SDI, 4K video transport, and high-rate serial data links well beyond the 1-4 GHz ceiling of a typical 75 Ohm BNC.
What the 12 GHz and 500-Cycle Ratings Mean for Field Life
A 75 Ohm BNC rated to 12 GHz is uncommon — most 75 Ohm BNCs top out around 4 GHz. That 12 GHz ceiling means the center contact and dielectric geometry are held to tighter tolerances, so the connector maintains a clean 75 Ohm transmission line all the way up. In a broadcast truck or test rack where a camera feed gets re-patched daily, 500 cycles translates to years of service before the contact resistance drifts.
Mounting Options: Board Edge or Panel
The 031-70526-12 gives two mounting paths in one part. As a board edge end-launch, the solder legs land directly on PCB traces at the board edge — useful when the BNC needs to sit flush with the enclosure wall and the PCB routes right up to the edge. As a panel-mount bulkhead, the front-side nut clamps the jack to a chassis cutout, and the lockwasher prevents the nut from backing off under vibration.