Standard DB9 Female Receptacle for Serial and Industrial I/O
The Molex 1731090582 is a 9-position D-Sub receptacle in the FCT 173109 series, configured as a female socket connector in the standard DE-9 (E) shell size. It is the mating half for the common DB9 male plug found on RS-232 serial ports, industrial controllers, and instrumentation panels. The two-row layout with machined copper alloy contacts delivers 5A per circuit — typical for signal-level D-Sub duty where the current limit is driven by pin density rather than contact capacity.
The shell is steel with tin plating, providing basic EMI shielding when mated to a conductive backshell or panel. The unthreaded housing/shell flange accepts standard D-Sub slide-locks or jack-screws for panel mounting — no threaded inserts, so the locking hardware is ordered separately. Through-hole solder termination keeps the assembly compatible with wave-solder lines and manual rework.