Abstract: A surge protector includes a first surge suppression assembly comprising a first conductive layer comprising an arm, an extension distal to the arm and having toothed edges, and a substantially C-shaped member projecting out of the extension and having toothed edges, and a substantially circular member with toothed edges formed at an open end of the extension; a second conductive layer comprising an arm including a terminal, an extension being distal the arm, a first substantially C-shaped member having toothed edges, and a second substantially C-shaped member at an open end of the extension wherein the first substantially C-shaped member, the substantially C-shaped member, the second substantially C-shaped member, and the substantially circular member are arranged concentrically; and an overvoltage protection assembly interconnecting the arm and the terminal. The overvoltage protection assembly is electrically connected to the first surge suppression assembly.

Abstract: A protection circuit includes first and second electronic switches. When a CPU socket does not contain a CPU, a signal pin of the CPU socket outputs a high level signal. The first and second electronic switches are turned on. A data transmitting line of a SMBus is connected to a digital integrated chip. The parameters of the digital integrated chip can thus be regulated. When the CPU socket contains the CPU, the signal pin of the CPU socket outputs a low level signal. The first and second electronic switches are turned off. The data transmitting line of the SMBus is disconnected from the digital integrated chip, to prevent damage to the digital integrated chip.