1/2 hp 1075 RPM, 3 speed 3.37 amps 208-230V Volts 60 Hz PSC Motor5.6" Dia. Frame, Rolled Steel, Flat Shaft 8 1/2" x 1/2" x 8 1/2"Service Factor = 1, Overload Protection: AutoHub Mount, Sleeve Bearings, Class B Insulation, CCW Lead End1 Year Manufacture WarrantyDirect Drive Fan Motor for central HVAC systems. Wiring diagram on motor name plate. OAO = Open Air-Over, K055RLD2210011B