A.O. SMITH 4MB91 - MOTOR, CONDENSER FAN MOTOR, PERMANENT SPLIT CAPACITOR, OPEN AIR-OVER, 1/4 HP, NUMBER OF SPEEDS 2, NAMEPLATE RPM 1625, NEMA/IEC FRAME 48Y, VOLTAGE 460, 60 HZ, FULL LOAD AMPS 0.9, STUD MOUNTING, AUTO THERMAL PROTECTION, INSULATION CLASS B