Electrical switching device having an ultrafast actuation mechanism and hybrid switch comprising such a device

Switching device having an ultrafast actuation mechanism for the opening of electrical contacts (21, 22), comprising a propelling coil (12) and a conducting disc (11). A fixed contact (21) engages, in the closed position, with a moving contact (22), said contacts being brought into the open position by repulsion of the conducting disc (11). A return device (5) generates a closure force (F1) for keeping said electrical contacts (21, 22) in the closed position. Means (30) for fastening the moving contact (22) in the open position comprise a magnetic yoke (32) having an attraction coil (33) delivering an attraction force (Fa) to a magnetic movable armature (31). The moving contact (22) is carried by a contact-carrier support (23) having driving means intended for cooperating, during movement of the moving contact (22), with the movable magnetic armature (31) in order to move it.