A fire protection fuse of the present disclosure includes a substrate; a first resistance pad and a second resistance pad disposed spaced apart from each other on the substrate; a first wiring pattern and a second wiring pattern disposed on the substrate and connected to the first resistance pad and the second resistance pad, respectively; and a resistor connected to the first resistance pad and the second resistance pad, wherein at least one of the first wiring pattern and the second wiring pattern has at least one bottleneck section.

An electric machine includes an electronic module including a conductive track coupled to a circuit board to define a power circuit. A conductive element connects first and second track portions of the conductive track to determine closure of the power circuit. The electronic module includes a heat-sensitive joint between the conductive element and the first track portion positioned on the printed circuit board opposite the conductive track. An elastic element presses against the conductive element to exert a force on the heat-sensitive joint, which is configured to yield at a threshold temperature. A support houses the electronic module with the conductive track and the conductive element disposed towards the support. The elastic element is disposed opposite the conductive track with respect to the support and operates between the conductive element and the support so that the force pushes the conductive element away from the conductive track.

An electric machine includes an electronic module including a conductive track coupled to a circuit board to define a power circuit. A conductive element connects first and second track portions of the conductive track to determine closure of the power circuit. The electronic module includes a heat-sensitive joint between the conductive element and the first track portion positioned on the printed circuit board opposite the conductive track. An elastic element presses against the conductive element to exert a force on the heat-sensitive joint, which is configured to yield at a threshold temperature. A support houses the electronic module with the conductive track and the conductive element disposed towards the support. The elastic element is disposed opposite the conductive track with respect to the support and operates between the conductive element and the support so that the force pushes the conductive element away from the conductive track.