Century A.O. Smith B2844 E-Plus Energy Efficient 56Y Square Flange 3HP Full Rated Pool and Spa Motor is a single-phase motor with a permanent split capacitor for enhanced running efficiency. Equipped with an auto overload protector and ball bearings, the Century Pool and Spa Pump Motor provides long-lasting operation. The Century Pool and Spa Pump Motor have a threaded shaft that allows for convenient and direct mounting. Available in horsepower ratings ranging from 1/2"P to 3HP, the Century Pool and Spa Pump Motor comes in Full or Up-Rated models and provides long-lasting and trustworthy performance.