Superior Electric SS400BU Single Phase AC Motor

The SS400BU is a 42-frame, single-phase SLO-SYN synchronous motor from Superior Electric that delivers 400 oz-in of torque at 72 RPM when powered from 120 VAC at 60 Hz. It is specified for 60 Hz operation and provides 200 steps per revolution, enabling precise control when paired with an appropriate drive. As part of the SLO-SYN family, this motor is designed for compact, synchronous torque delivery in automation and motion-control applications requiring reliable performance at low to moderate speeds. The model is listed in multiple vendor catalogs as SS400BU, reflecting its status as a long-standing part in the Superior Electric SLO-SYN lineup.