This is a Regal Beloit Century Q3302V1 Square Flange 3-Phase Full-Rated 3 HP Pool and Spa Pump Motor, 3450 RPM, 208-230/460 Volts, 56Y, Square Flange, Threaded Shaft.
Century motors by Regal have been carefully engineered to meet the rugged demands of the pool and spa industry. They are the innovative leader in pool pump motors.