NEMA Magnetic Motor Starters with Solid State Overload Relays• Class 10/20 selectable thermal protection 3-pole, 60/50 Hz, 600VAC max. Full-voltage starters start and stop 3-phase AC motors. Manual push-to-test and visible trip indicator. Trip-free construction allows overload relay to trip even if reset lever is blocked or in the reset position. Overload relay has heaterless construction and adjustable full load amp setting. Normally open holding circuit contact allows 3-wire control. Angled contacts provide high contact pressure and positive seating. Spring-assisted gravity dropout on de-energizing quickly extinguishes any arcing.UL Listed and CSA Certified.