A fusible link unit includes a conductor having a fuse function, and a housing that accommodates the conductor. The conductor includes an input terminal that inputs electric power from a power source, an output terminal that outputs the electric power, a fusing portion disposed on an energization path from the input terminal to the output terminal, and a relief terminal portion capable of connecting a relief tool for supplying the electric power to the power source from outside. The input terminal and the relief terminal portion are provided on a continuous exposed piece of the conductor exposed from the housing.

A protective element includes: a fuse element configured to be energized in a first direction, which is a direction from a first end portion of the fuse element to a second end portion of the fuse element; a first terminal electrically connected to the first end portion; a second terminal electrically connected to the second end portion; a case made of an insulating material, having therein a housing portion storing the fuse element, and exposing a portion of the first terminal and a portion of the second terminal to an outside of the case; and a cover made of an insulating material having a tube shape, covering a lateral face along the first direction of the case, and exposing a portion of the first terminal from a first end of the cover, and exposes a portion of the second terminal from a second end of the cover.

A protective element includes: a fuse element configured to be energized in a first direction, which is a direction from a first end portion of the fuse element to a second end portion of the fuse element; a first terminal electrically connected to the first end portion; a second terminal electrically connected to the second end portion; a case made of an insulating material, having therein a housing portion storing the fuse element, and exposing a portion of the first terminal and a portion of the second terminal to an outside of the case; and a cover made of an insulating material having a tube shape, covering a lateral face along the first direction of the case, and exposing a portion of the first terminal from a first end of the cover, and exposes a portion of the second terminal from a second end of the cover.