Standard model A, RPM 1140 (1/4 to 3/4 h.p), 1725 rpm (1/4 to 1/2 h.p.), 3450 RPM (1/4 to 1/3 h.p.) PhazPak Phase Converter Standard Solid State Model A, for light to medium starting loades where full horsepower is not required. Up to 75% efficient. PhazPak has totally simplified the process of converting your three phase motors to single phase. With just two lead wires to connect to your motor, Other make static type converters use mechanical relays in their units, commonly called chatterboxes, PhazPak static converters are 100% solid state, no chattering, no contacts to burn. These are just a few of the PhazPak advantages. Of course the biggest advantage is the price. Advantages: Low Cost Solid State Sealed Easy Installation Automatic Reversible Electronically Protected Small Size Typical Applications: Lathes Milling Machines Drill Presses Sewing Machines Grinders Light Duty Applications Horse Power