Surge killer tube

The utility model relates to a detail of a spark gap, more specifically relates to a surge killer tube used for overvoltage protection. The utility model comprises a silicon wafer, glass sheets, a glass tube, electrode blocks, alloy wires, and noble gases. The utility model is characterized in that both sides of the silicon wafer are clung with two glass sheets which are matched with the silicon wafer, outer sides of the glass sheets are clung with an electrode block respectively, a sealed glass tube is arranged outside the silicon wafer, the glass sheets, and the electrode blocks, two alloy wires are respectively connected with the electrode blocks which are arranged at both ends of the glass tube, and noble gases are arranged in the glass tube. The utility model has the advantages of simple structure, symmetric breakdown voltage, reliable performance, and high speed.