Metric Motor 3-Phase IP55 Enclosure 1/2 HP 0.37 kW Nameplate RPM 1645 Frame D71 Voltage 230/460 60/50 Hz 3 Phase Full Load Amps 1.8/0.9 Rigid Base Mounting Thermal Protection None Insulation Class F Service Factor 1.15 Ball Bearings Frame Material Aluminum Ambient Temperature 40 Degrees C CW/CCW Rotation Nominal Efficiency 74.0 Percent Continuous Duty 1701-1800 UL Recognized CSA Certified CE Certified