Overvoltage protection device comprising a disconnection accessory

An overvoltage protection device for use with an electrical cut-off device triggered by a trigger system, the device comprising:

• at least one overvoltage protection component;
• a thermosensitive member capable of deforming, dependent upon the temperature thereof;
• a thermal connection between the at least one protection component and the thermosensitive member;
• and at least one resettable mechanical member for cooperating with the thermosensitive member and capable of cooperating with the trigger system for resettably triggering the electrical cut-off device;
• wherein the thermosensitive member and the at least one mechanical member are arranged such that, when the thermosensitive member exceeds a given temperature threshold, the thermosensitive member, by reason of the deformation thereof, causes a movement of said at least one mechanical member capable of actuating the trigger system for triggering the electrical cut-off device to cut-off electrical power to said at least one overvoltage protection component without cutting off electrical power to users of said electrical power external to said overvoltage protection device.