75 Ohm BNC Jack — Impedance Match First
The 31-71043-1010: If your cable or equipment is 50 Ohm, this connector will cause a return-loss mismatch that eats into your signal budget. The impedance is fixed by the dielectric geometry in the polypropylene (PP) insulator, so there is no field adjustment. The 500 mating cycles mean the gold-plated phosphor bronze center contact holds up to repeated connect-disconnect in test racks or patch panels without the center pin wearing loose. The right-angle through-hole termination exits the rear of the body, so the solder tails sit parallel to the PCB — plan the board layout so the signal trace transitions cleanly from the 75 Ohm launch.
Panel mount via the bulkhead — the front-side nut clamps the jack to the panel, and the zinc die-cast body with nickel finish provides the ground reference and shielding. The PP dielectric stays stable across that span — no dielectric creep or impedance drift at the temperature extremes. Supplied in bulk packaging — order by the piece for prototype or low-volume builds. No reel or tray to handle.