H685V1 replaces A.O. Smith/Century stock# H685. NOTE: The body length on this new motor is approx. 2 1/4" longer than the original motor. This is to meet the new efficiency requirements. Product Type: 3 Phase HP: 1 RPM: 1140 Volts: 200-230/460 Amps: 3.8-3.6/1.8 Hz: 60 Phase: 3 Frame: 56Y Enclosure Type: TEAO (Totally Enclosed Air Over) Mounting: Rigid Motor Diameter: 6-1/2" Shaft Diameter: 5/8" Keyed Shaft Length: 4" Rotation: Reversible Number of Speeds: 1 Service Factor (SF): 1.00 Bearings: Ball Thermal Protection: Automatic Maximum Ambient Temperature: 60° C Insulation Class: B Duty Cycle: Continuous H685V1 is listed in Century's cross reference as a possible substitute for the following: A.O. Smith 182514, Century 165832, Century 182514, Emerson P63SYDBY-3115, Emerson P63SYDYK-3497, GE K1485, GE K48PG1224AS, Dayton 4ME20, Dayton 5M598, Johnstone Supply S89-201, Marathon 56T11D5202, Emerson 1820, Marathon X513, Universal Electric 721