Square D 1457-S2-W27 Polarized Contactor Coil

The Square D 1457-S2-W27 Polarized Contactor Coil is a replacement magnet coil designed for Square D Type S contactors, enabling reliable actuation of the contactor’s switching function when control current is applied. As a polarized coil, it requires correct wiring polarity to ensure consistent pickup and release, a hallmark of the 1457-series coils used across multiple S-size contactors. Built to fit compatible Square D 1457-S2-W27 installations, this coil supports standard control circuits in industrial motor control, heating, and power-distribution applications where a Type S contactor provides safe, isolated switching for electrical loads. Typical replacement practice is to match the 1457 coil family, coil form, and mounting style with the existing contactor assembly to maintain proper clearance, mounting, and electrical connections, without modifying the control circuit. Because coil identity—1457-S2-W27—aligns with Square D's legacy S-series coil catalog, it is commonly used in retrofits and spare parts inventories to keep older control systems operational without resorting to complete contactor replacement.