75 Ohm BNC Bulkhead Jack — ZDC / Greenpar Series
The 75 Ohm impedance matches the standard for composite video, CCTV, and SDI distribution, not the 50 Ohm used in RF test equipment. Rated to 2 GHz, it covers standard-definition and HD-SDI up to 3G-SDI comfortably, though it sits below the 12G-SDI ceiling. The bayonet lock gives a quarter-turn mate that holds under vibration without tools, and the nickel-plated zinc alloy body with the front-side nut mounts flush to the panel.
The 75 Ohm impedance is the defining spec — this jack is for 75 Ohm cable and system impedance, not 50 Ohm. Using it in a 50 Ohm path creates a mismatch that reflects signal and rolls off the frequency response. The 2 GHz maximum frequency means it handles analog video up to several hundred MHz and digital SDI up to 3 Gbps, but not 12G-SDI at 12 GHz. The 500 V voltage rating is the dielectric withstand between centre conductor and shield, sized for the peak voltages in video distribution, not mains power.
For a BOM that calls this exact order code, the procurement path is a last-time-buy or broker search; there is no direct factory supply.
This is a jack (female socket) — the mating half is a standard male BNC plug with a bayonet coupling nut. The panel mount uses a front-side nut that tightens against the bulkhead; the body has a board guide and is isolated from the panel by the dielectric material.