12-Position Panel-Mount Receptacle for Field Wiring
The Hirose HR10A-10R-12S(71) is a 12-position panel-mount receptacle from the HR10A series, a compact push-pull circular connector line designed for instrumentation, industrial controls, and test equipment where quick disconnect and secure latching matter more than a threaded coupling. This is the female socket version with solder cup termination — you terminate each wire individually at the cup, then mount the connector through a panel cutout and secure it with the rear-side nut.
Sizing the Contact Duty: 2 A and Silver Plating
The silver mating finish at 78.7 µin is thicker than the flash plating on economy circulars; it gives a stable contact resistance over several hundred mating cycles in dry indoor environments. Silver tarnishes in sulphurous air, so if the application sees industrial atmospheres or outdoor storage, the contact resistance drift matters more than the raw current rating.
Mating Half and Field Installation
This receptacle mates with the matching HR10A series push-pull plug — the male pin version is the HR10A-10R-12P(73), which carries the same shell size 10, same 12-position count, and same silver-plated contacts but with brass pins instead of phosphor bronze sockets. The push-pull latching engages with an audible click; there is no threaded collar to torque. For panel mounting, the bulkhead hole diameter and the rear-side nut thread pitch follow the HR10A shell size 10 drawing — confirm the panel cutout against the Hirose product specification before machining.
Position Count vs the 10-Position Sibling
The HR10A-10R-10S(71) is the 10-position version in the same shell size 10, same 2 A rating, same silver-plated contacts. The 12-position HR10A-10R-12S(71) packs two more circuits into the identical panel cutout — useful when the harness needs extra signal lines without upsizing the shell. Both use the same solder cup terminals and the same push-pull plug family, so swapping between them is a BOM position count decision, not a panel rework.