The Hirose HR10A-7R-4SB(73) is a 4-position female receptacle from the HR10A series, a compact push-pull circular connector line. It uses a shell size 7, carries silver-plated phosphor bronze contacts rated 2 A per circuit, and is keyed to prevent mis-mating. The housing is zinc alloy with nickel shell finish, and the insert is PBT rated UL94 V-0. The panel-mount bulkhead feature (rear side nut) allows the receptacle to be fixed to a chassis or enclosure wall, with the solder cups accessible from the inside for wiring.
This receptacle mates with the HR10A-7R-4PB(73) male pin plug — same shell size 7, same push-pull lock, same 4 positions. Termination is solder cup on both halves; the receptacle mounts to a panel via a rear-side nut (bulkhead style). The keyed orientation ensures the plug and receptacle align only one way, preventing pin damage during mating.