These surge protection devices intended for computer networks are specially designed for protection and faultless data transmission within the 5th category computer networks. They protect the input circuit network cards against damage caused by overvoltage effects within the LPZ concept at the boundaries of LPZ 1-2 according to EN 62305 ed.2. It is recommended to use these protective devices at the input of the protected equipment. PZH HT-NET 5Ecat/D are available in a version with screw terminals or screwless terminal block.