Siemens 75D73251A Contactor Coil for 75D Series

Siemens 75D73251A is a replacement coil kit for the 75D-series line of hard-wired power contactors, specifically designed to fit sizes 3 through 3.5 (S3 to S3.5) so technicians can restore coil operation without replacing the entire contactor assembly. This dual‑voltage coil accepts 110–120 VAC or 220–240 VAC input and is compatible with 50/60 Hz control systems, allowing it to be wired into common international and North American control circuits that power standard industrial equipment. As an official Siemens accessory, the 75D73251A is used to energize the S3–S3.5 contactor coils in motor control panels, conveyors, pumps, and other automation components where a compact, reliable replacement coil is required to maintain switching performance. Coil code mapping and cataloging place 75D73251A among the A-series voltages (110–120/220–240 VAC) at 60 Hz, supporting straightforward part selection for field service and preventing mismatches that could lead to improper coil operation.