BNC Jack for 50-Ohm Coax Lines — Panel-Mount, Solder Termination
The 031-5493: Mounting is bulkhead-style with a front-side nut, through-hole solder cups for the centre contact and shield. The board guide and isolated features help align the connector during panel installation and prevent ground loops through the housing.
The 500-cycle rating on the 031-5493 is driven by the gold-plated centre contact — gold resists oxidation and wear through repeated mates better than tin or silver. For a panel jack that sees daily connect/disconnect in a lab or production test rack, 500 cycles translates to several years of service before the contact resistance drifts outside spec. If the connector is mated once and left in place (cable-to-equipment permanent install), the cycle count is effectively irrelevant — the dielectric and plating will outlast the equipment.