Circuit protection element

A circuit protection element formed by bending a metal plate and used in a state plastically deformed after being mounted on a circuit board, comprising:

• a ceiling part serving as a bending reference plane during forming;
• a first leg part formed by being bent, from a first end part of the ceiling part once with respect to the bending reference plane;
• a first mounting part formed by being bent, from the first leg part so as to be parallel to the ceiling part, twice with respect to the bending reference plane:
• a second leg part formed by being bent, from an end part, different from the first end part, of the ceiling part, once with respect to the bending reference plane;
• a second mounting part formed by being bent, from the second leg part so as to be parallel to the ceiling part, twice with respect to the bending reference plane:
• and
• a plastic deformation part set in a predetermined part of the second leg part so as to be plastically deformed by applying a load in the vicinity of a second end part opposite to the first end part, in a longitudinal direction of the circuit protection element, of the ceiling part toward a mounting surface of the circuit board.