Allen-Bradley 0A257 110-220V Dual Voltage Relay Coil

The Allen-Bradley 0A257 dual-voltage coil is a compact AC control coil designed for size 0 contactors and starters, capable of operating from either 110–120 VAC or 220–240 VAC at 60 Hz. With screw-terminal mounting and a single-lead configuration, it simplifies field wiring and provides reliable energization for demanding industrial environments. This genuine Allen-Bradley coil is intended to energize the associated 0-series contactor assemblies, enabling fast, clean control of motors, conveyors, pumps, and other loads in control panels and machine interfaces. Typical applications include machine automation, line-start/stop circuits, safety interlock schemes, and panel retrofits where a dual-voltage coil reduces the need to stock separate 110 V and 220 V coils. When selecting this coil, ensure the control voltage matches your supply and confirm compatibility with your specific 0-series contactor model to maintain proper pull-in characteristics and coil current. The 0A257 coil offers a straightforward replacement option in maintenance or upgrades, minimizing downtime by preserving existing enclosure layouts and wiring footprints while delivering consistent actuating force for dependable relay operation.