雷击是严重自然灾害，被世界气象组织列为十大自然灾害之一。随着计算机技术和电子信息的不断发展，日益繁忙庞杂的事务通过高速电脑、自动化设备及通讯设备得以井然有序，而这些敏感电子设备的工作电压却在不断降低，其数量和规模不断扩大，因而它们受到过压特别是雷电袭-Lightning is a serious natural disasters, by the World Meteorological Organization as one of the top ten natural disasters. With the computer technology and the development of electronic information, the affairs of numerous and increasingly busy high-speed computers, automation equipment and communication equipment to be organized, sensitive electronic equipment which have been continuously reducing the operating voltage, the number and scale, therefore they are over-voltage lightning attack, especially