固体放电管是基于晶闸管原理和结构的一种两端负阻器件。可以吸收突波，抑制过高电压，达到保护易损组件的目的。该器件是在硅单晶片两面同时掺杂同种杂质而形成。简单的结构如图１所示。图中ｐ区和ｎ区连结在一起。选用不同的材料和工艺，可以做出各种不同电压和电流的放电管 Solid discharge tube is based on the thyristor principle and structure of a negative terminal device. Can absorb surge, suppress high voltage, to protect the purpose of vulnerable components. The device is formed on both sides of the silicon single-crystal doped with the same impurities at the same time. Simple structure shown in Figure 1. The p and n regions in the figure are linked together. Selection of different materials and processes, can make a variety of different voltage and current discharge tube