Pyro-mechanical breaker

The device has a housing in which an electrical conductor is arranged, a separation piston with a separation chisel for separating the conductor and a pyrotechnical charge for driving the piston. The chisel first cuts through a conductor constriction only on one side, at least partly turns around the longitudinal side with further penetration then clamps the bent tongue after further penetration. The device has a housing (2) in which an electrical conductor (3) is arranged, a separation piston (5) with a separation chisel (8) for separating the conductor and a pyrotechnical charge (13) for driving the piston. The chisel bends after separating the conductor to form a tongue (18) protruding from the conductor. The conductor has a cross-sectional constriction in the longitudinal direction with two transverse sides and two longitudinal sides The chisel first cuts through the constriction only on one side and at least partly turns around the longitudinal side with further penetration then clamps the bent tongue after further penetration.