Overcurrent protection device

The utility model which relates to an over current protection device comprises a current sensing element, a first electrode foil and a second electrode foil; the first electrode foil and the second electrode foil are respectively attached on the upper and the lower surface of the current sensing element; current sensing element is provided at least a bending section. The internal side position of the first electrode foil and the second electrode foil at the bending place is provided with a cut, and the utility model comprises two metal conducting plates which are respectively attached on the first electrode foil and the second electrode foil, and the arrangement direction and position of the first metal conducting plate and the second metal conducting plate can be regulated according to the need of the space. The cut is filled with conductive composite materials, and because the utility model is provided with the bending section which forms a three-dimensional model, and the area of the current sensing element and the normal state resistance value can be decreased.