Amphenol 07-3106A-20-4S, M85049 41-12A Circular Connector

Amphenol 97-3106A-20-4S is a four-position circular connector plug (straight) from the 97-Series MIL-DTL-5015 family, featuring four female (socket) contacts terminated via solder-cup terminals. The shell size is 20 and is manufactured from aluminum alloy, delivering a robust, lightweight housing suitable for harsh environments. This configuration provides four circuits in a straight-plug arrangement, enabling reliable power or signal transmission in aerospace, defense, and industrial equipment where MIL-spec circular connectors are preferred. The part is commonly cross-listed with MS3106A20-4S, reflecting compatibility with standard MIL-spec receptacles and allowing use with a broad range of mating sockets of the same series. The 4-pin, solder-socket arrangement simplifies field assembly and maintenance, and the straight-plug form factor supports straightforward harness routing in tight equipment bays. Typical applications include aircraft or vehicle harnesses, ground-support equipment, sensors, and instrumentation where rugged, vibration-resistant circular connectors are required.