Eaton DILM500/22 (RA250) – High-Power AC Contactor with Integrated Auxiliary Contacts The Eaton DILM500/22 (RA250) is a three-pole, AC-operated power contactor from the high-capacity end of the DILM series. It is engineered for switching and controlling extremely large three-phase AC motors and heavy industrial loads, and comes with a pre-configured set of auxiliary contacts.