Allen-Bradley 73A81 Contactor Coil Size 3 550V

Allen-Bradley 73A81 Contactor Coil, Size 3, is a high‑voltage AC coil replacement for compatible Allen‑Bradley size‑3 contactors. It is rated for 550 V AC at 50 Hz and 600 V AC at 60 Hz, enabling operation on common 50/60 Hz power systems. This coil assembly is not a complete contactor by itself and must be paired with a matching Size 3 contactor body to form a full motor‑control device used in industrial automation to energize and switch loads. To ensure proper fit, verify that the original equipment model and pole configuration match the 73A81 coil. The coil is designed for AC operation and is intended for use with equipment that specifies a 550/600 V coil in the Size 3 family, providing a replacement option for installations that originally specified these voltage ratings.