SUPCO offers the most complete line of refrigeration relays, overloads and hard starts in the industry. For refrigeration systems with and without run capacitors, just choose the right combination for your application. All combinations are pre-wired Locked rotor protection eliminates start winding overheating RO series features "snap-on" bracket Can be used with and without start capacitor motors from 1/4 to 1/3 hp UL Recognized, Manufacturer: SUPCO