CYD1-XH-RJ45 series network surge protection device suits for network servers, routers,network switches, HUB, information terminals and other equipment in the network line lightning and surge protection. The core components using imported semiconductor clamping devices and imported integrated overvoltage protection devices, to achieve a highly efficient and reliable anti-high voltage pulse impulse function and accurate clamping voltage. The product network port protection includes a single-port 4-wire (12,36) and 8-wire (12,36,45,78) protection and a hub-and-spoke 8-, 16- and 24-port Ethernet switch. The interface is a standard RJ45 interface, easy installation and maintenance, 8 /20μs maximum discharge current Imax up to 10KA / line, the action response time for high-speed Internet lightning surge protection.