The TPS-LC9 signal surge protector is designed according to the IEC communication lightning protection standard and is used for surge protection of weighing transmission signals. TPS-LC9 has the characteristics of large flow capacity and fast response speed, which can effectively ensure the normal transmission of signals. The protector is designed with equipotential bonding and is connected between the system incoming line and the protected device. When subjected to a surge, the lightning current is discharge to the earth through the protector. The output voltage of the protector is limited to the safety value of the device. The surge protector can return to the initial state after the Impact discharge, without special maintenance.