Modern mobile communication technology is developing at an unprecedented speed. As an indispensable communication base station of modern mobile communication, it is suffering from severe weather conditions. In particular, most of the base stations outside the city are located at the top of the mountain with the highest elevation in the local area. The power supply uses overhead lines to go up the mountain. The grounding system of the base station is also limited by the geographical environment, which is very vulnerable to direct lightning, induced surge and power operation over-voltage.

With the rapid development of 4G and 5G communication, the demand for small size and excellent performance SPD is extremely urgent. PTG has developed a series of high-tech SPDs for outdoor base stations, indoor power distribution cabinets and compact PDUs with its own patent technology.