This Leeson 1/3 HP totally enclosed 1625 RPM commercial-duty motor is designed for air circulators where motor is mounted directly to fan column. UL and CSA recognized.HP 1/3 Rated RPM 1,625 Volts 115/230 Amps 3.4 at 115 Volts Hertz 60 Shank Diameter (in.) 1/2 Frame Type NEMA 48Y Totally Enclosed Housing Yes Auto Overload Protection Yes UL Recognized CSA Recognized.