3/4 hp 1625 RPM (3 speed), 4.4-4.2 amps 208-230V Volts 60 Hz PSC Motor5.6" Dia. Frame, Rolled Steel, Flat Shaft 1/2" Diameter x 6"Service Factor = 1, Overload Protection: AutoHub 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, K055KDH9451022B