Surge protection module

Abstract

The invention discloses a surge protection module. The surge protection module comprises a piezoresistor; the module also comprises a shell, an assembly shell, a welding sheet, a welding pin, a firstelectrode sheet, and a metal pressing sheet; a first groove is formed in one side of the assembly shell, the welding sheet, the piezoresistor and the first electrode sheet are sequentially placed in the first groove in an overlapped mode, and the welding sheet is located at the bottom; the metal pressing sheet compresses the first electrode sheet in the first groove in a detachable connection mode, so that the welding sheet and the first electrode sheet are tightly attached to the two surfaces of the piezoresistor respectively; and a boss is arranged on the side face of the welding sheet, a notch for exposing the boss is formed in the bottom of the first groove, one end of the welding pin is connected with the boss in a welded mode, and then a tripping point is formed at the welding connection point. According to the invention, the problem that heat is absorbed by the piezoresistor during welding is avoided, the protection on the electrical property of the piezoresistor is enhanced, and meanwhile, the problem of use limitation is relieved.

Description

technical field [0001] The invention relates to the field of surge protectors, in particular to a surge protector module. Background technique [0002] SPD refers to surge protector, also called lightning protector, which is an electronic device that provides safety protection for various electronic equipment, instruments and meters, and communication lines. When the electrical circuit or communication line suddenly generates a peak current or voltage due to external interference, the surge protector can conduct the shunt in a very short time, so as to avoid the damage of the surge to other equipment in the circuit. [0003] The on-board SPD tripping structure commonly used in the market is an integrated structure. The tripping principle is that the low-temperature solder joints between the piezoresistor and its pins will melt the low-temperature solder joints through current heating to achieve the automatic separation of the pins. deduction purpose. In the existing trippi...

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