A device for providing electrical protection against voltage surges. The device comprises a protector unit connected to the electrical equipment via a connection circuit including an electric current interrupter means movable between a return position corresponding to the circuit being open-circuit, and a position for closing the circuit. The interrupter means is maintained in the closed position by a blocker means. Further, the connection circuit is opened when the temperature of the unit reaches a predetermined value, via an opener means that that contains means sensitive to the heat given off by the unit. The heat-sensitive means is functionally connected to an actuator means so that when the predetermined temperature is reached, the actuator means produces a force for deactivating the blocker means.