Allen-Bradley 71A288 Operating Coils

Allen-Bradley 71A288 operating coil is a size-1, Series K magnetic coil designed for Allen-Bradley Bulletin 700‑series contactors and motor starters. It is rated for 480V AC at 60 Hz or 440V AC at 50 Hz, enabling operation in both 60 Hz and 50 Hz power environments. The coil is compatible with multiple 700-series devices, including 702-BOB, 702L-BOB, 709-BOB, 705-B, 707-B, 712-B, 713-B, and 715-B, and supports non-reversing, reversing, multi-speed, and combination configurations. When energized, the coil actuates the contactor magnet to close the contacts, enabling control of electrical loads in industrial motor circuits and other standard control panels that use the 700 line. The 71A288 is engineered to fit the Size 1, Series K form factor, ensuring proper mechanical and electrical interfacing with the corresponding 700-series starters and maintaining compatibility with legacy installations that use 440V or 480V control voltages.