1/2 hp 825 RPM (2 speed), 3.9 amps 230V Volts 60 Hz PSC Motor5.6" Dia. Frame, Rolled Steel, Flat Shaft 1/2" Diameter x 6"Service Factor = 1, Overload Protection: AutoHub and Stud Mount, Sleeve Bearings, Class B Insulation, Rev1 Year Manufacture WarrantyDirect Drive Fan Motor for central HVAC systems. Wiring diagram on motor name plate. OAO = Open Air Over, KA55SAB0941802B