YuCo YC-GP-DPDT-2 Power Relay 110/120V AC Coil 30Amp 2 Pole DPDT Heavy-Duty UL Listed RU Yuco double pole double throw contacts general purpose relay 110/120V ac capacity 30 amp 250vac /28vdc 2no/2nc Contact form DPPT with plastic cover Clapper relay Electrical replacement part