Novel surge protection device

The utility model relates to a novel surge protection device. The novel surge protection device comprises a lightning protection element, an over-current protection device, a thermal protection device and a shell, wherein the lightning protection element and the over-current protection device are connected in series so as to form a surge bleeding closed circuit, and the thermal protection device is located on an electrode of the lightning protection element; and the novel surge protection device further comprises a force detector, a signal processing device, a current limiter, a buffer displacement elastic sheet, an inertia device, an electromagnetic actuating mechanism, a linkage mechanism and a normally-open contact, wherein the force detector is connected with the signal processing device, the signal processing device is connected with the electromagnetic actuating mechanism, the electromagnetic actuating mechanism controls the buffer displacement elastic sheet and makes the same to move, the buffer displacement elastic sheet is connected with the inertia device, the inertia device controls the normally-open contact and makes the same to act through the linkage mechanism, and the normally-open contact and the current limiter are connected in series so as to form a bypass which is connected in parallel with two ends of the lightning protection element. With the novel surge protection device of the utility model adopted, the problem of actuating dead zones of an existing thermal protection device and an existing over-current protection device can be solved fundamentally.