ABB WB75A-04

A Mech Latch,110/50&dc,120/60|Mechanical latching device with electromagnetic impulse unlatching (AC or DC) or manual unlatching. After closing, the contactor continues to be held in the closed position by the latching mechanisim should the supply voltage fail at the contact coil terminals. WB75A is clipped onto the front face of the contactor.