75 Ohm BNC Jack for Video and Broadcast Signal Paths
The Molex 0731711900 is a 75 Ohm BNC jack — female socket, through-hole solder termination, with a bayonet lock for quick quarter-turn mating. The 75 Ohm impedance tells you this is a video-grade connector, sized for composite video, CCTV, and broadcast baseband signal paths where the characteristic impedance of the cable and connector must match to avoid reflections. The center contact is gold-plated phosphor bronze, which keeps contact resistance stable across the rated 500 mating cycles — important for patch panels and field-service connections where the connector sees regular reconnects. The body is a nickel-plated zinc alloy, giving it the standard BNC mechanical feel and RF shielding performance.
Mating and Termination
The bayonet lock mates with any standard BNC plug — the quarter-turn coupling provides positive retention under vibration while staying field-serviceable. Termination is through-hole solder for both the center contact and the shield, which gives a reliable solder joint on the PCB for the signal and ground paths. The dielectric is polyethylene (PE), the standard BNC insulator material that maintains the 75 Ohm impedance through the connector body.