A current breaking device including a main stationary contact; a vacuum cartridge connected to the main contact and, having a rod supporting a second movable contact for connection with a second stationary contact on the main contact; a main movable contact for connection with, the main stationary contact; and a rigid rocker arm pivotally connected to the actuating rod of the vacuum cartridge, and about another axis fixed with respect to the main stationary contact and vacuum cartridge, so that upon rotation of the rocker arm to open both the main and second contacts, the main contacts are opened before the second contacts, and upon rotation in the opposite direction the second contacts are fully closed before any movement of the main contacts toward closure.