Protective element

A protective element, comprising:

• a fuse element cuttable by energization in a first direction;
• a slider made of an insulating material, comprising:
• a plate-shaped portion extending in the first direction and comprising a first edge portion and a second edge portion on an opposite side of the first edge portion in the first direction;
• a shielding portion erected in a second direction intersecting the first direction from a position between the first edge portion and the second edge portion, having a shielding-portion through hole penetrating the shielding portion;
• and
• a case made of an insulating material, comprising a housing portion which houses a portion of the fuse element and houses the slider;
• wherein
• the housing portion has:
• a fuse-element housing space which houses the fuse element;
• a shielding-portion housing space which houses the shielding portion such that the shielding portion is movable in the second direction;
• and
• a plate-shaped-portion moving space that houses the plate-shaped portion such that the plate-shaped portion is movable in the second direction,
• the fuse-element housing space and the shielding-portion housing space intersect, and
• prior to the fuse element being cut, the slider and the fuse element are housed such that the fuse element is inserted into the shielding-portion through hole.

A protective element, comprising:

• a fuse element comprising a first end portion, a second end portion, and a breaking portion provided between the first end portion and the second end portion, and being cuttable by energization in a first direction heading from the first end portion to the second end portion;
• a slider comprising:
• a plate-shaped portion made of an insulating material;
• a shielding portion made of an insulating material, erected on a first edge portion of the plate-shaped portion, and having a shielding-portion through hole penetrating the shielding portion;
• and
• a case made of an insulating material, having therein a housing portion which houses the fuse element and the slider, and having a first insertion hole that opens to a first wall face in the housing portion, wherein
• the plate-shaped portion divides an interior of the housing portion into a first space and a second space,
• the shielding portion is disposed along the first wall face, the breaking portion is disposed in the shielding-portion through hole, the first end portion is housed in the first insertion hole, and
• the slider is configured to move by receiving increased pressure in the first space due to an arc discharge at a time of the breaking portion being cut such that a ratio of a volume of the first space to a volume of the housing portion increases, and that an opening of the first insertion hole is plugged by the shielding portion.