Ratings: 3 HP Max., 230VAC, 3-Phase, Size 0, Enclosure; NEMA1, Heater Included; E53......................(Across-Line Magnetic Motor Starter) Features: Quiet Operation - Greater Durability: Incorporates A Cushioned, Insulated Coil That Has Dramatically Reduced The Vibration and Noise, Resulting In The Quietest Contactor On The Market. No Irritating Buzz Or Hum. Exclusive Insulated Coil: Class F Coil Standard Protects Against High Heat Damage and Extends Coil Life. Enclosed Push-To-Test Button: Recessed To Prevent Accidental Operation. New Cross Arm Guidance System Reduces Chances Of Binding. Longer Life Expectancy: We've Reduced The Number Of Moving Parts and Made The Remaining Parts Stronger Resulting In A Contactor That Has More Than Two Times The Normal Mechanical Life. Meets ARI-88, UL, CSA and All Major OEM Specifications.