Allen-Bradley 73A803 is a size-3 contactor/starter coil designed for use with compatible Allen-Bradley contactors or starters. It operates on AC line voltages of 110–120 V and supports 50/60 Hz environments (110 V at 50 Hz or 120 V at 60 Hz). The coil was discontinued by the manufacturer in 2006, but remaining units are still sold by third-party distributors and resellers as replacement coils for size-3 equipment. When selecting a replacement, verify the host device is a size-3 contactor or starter and that the coil voltage and frequency match your electrical supply to ensure proper operation.
