Protective element

A protective element, comprising:

• 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, wherein
• the case has a buffer recess on the outer face thereof,
• the protective element is provided with an internal-pressure buffer space surrounded by the buffer recess on the outer face of the case and an inner face of the cover,
• the case has a vent hole that penetrates the case and communicates the housing portion and the internal-pressure buffer space, and
• the outer face of the case and the inner face of the cover seal a space region that is the housing portion and the internal-pressure buffer space.