A protection device for an electrical circuit configured to transmit an electrical current to a load, the protection device comprising: - a first conductor, - a second conductor, - at least one component for interrupting an electric current, the interrupting component comprising a control zone, capable of receiving a triggering signal, and a power zone for passing the electric current, and - a control circuit configured to generate and transmit the trigger signal to the control zone of the switching component, the device being characterised in that it further comprises a fuse connected in series between the first conductor and the switching component in such a way that the current flowing through the fuse passes integrally through the power zone of the switching component when the power zone is in a state allowing the current to flow, the fuse being able to supply a supply voltage to the control circuit, in that the fuse has a cut-off voltage (V 10), which is defined as the electrical voltage value across the fuse above which the fuse cannot interrupt the flow of current when the fuse is blown, in that the fuse has a nominal voltage value (V n), which is equal to a maximum electrical potential difference that can be applied between the terminals of the protection device by supplying the load, without cut-off by the protection device, in that the fuse has a cut-off current (I 10) which is equal to a nominal electrical current value (I n), the nominal current value (I n) being defined as the maximum value of the current intended to flow in the device during normal operation, in that the control circuit is connected between the fuse and the control region of the switching component, and in that the cut-off voltage (V 10) of the fuse is at least four times less than or equal to the nominal electrical voltage value (V n). - a first conductor, - a second conductor, - at least one component for interrupting an electric current, the interrupting component comprising a control zone, capable of receiving a triggering signal, and a power zone for passing the electric current, and - a control circuit configured to generate and transmit the trigger signal to the control zone of the switching component, the device being characterised in that it further comprises a fuse connected in series between the first conductor and the switching component in such a way that the current flowing through the fuse passes integrally through the power zone of the switching component when the power zone is in a state allowing the current to flow, the fuse being able to supply a supply voltage to the control circuit, in that the fuse has a cut-off voltage (V 10), which is defined as the electrical voltage value across the fuse above which the fuse cannot interrupt the flow of current when the fuse is blown, in that the fuse has a nominal voltage value (V n), which is equal to a maximum electrical potential difference that can be applied between the terminals of the protection device by supplying the load, without cut-off by the protection device, in that the fuse has a cut-off current (I 10) which is equal to a nominal electrical current value (I n), the nominal current value (I n) being defined as the maximum value of the current intended to flow in the device during normal operation, in that the control circuit is connected between the fuse and the control region of the switching component, and in that the cut-off voltage (V 10) of the fuse is at least four times less than or equal to the nominal electrical voltage value (V n).