FA-network density and area in the large-scale factories are going to be more higher and larger. This trend brings more often damage caused by lightning surge entered through PLC-communication cables, instrument-connecting and measuring cables, control cables etc. to the networks, starting from " things damage " like damage to equipments, leading up to the worst case " factory closing damage " due to production line stop. In the recent years damage due to lightning surges became more severe.

SIG-series is adaptable to the various signal cables for PLC-communication, instrument -connecting and measurement control etc. and has an excellent capability for voltage suppression and high current handling (direct lightning strike wave form 10/350μs 2.5kA) and guarantees stable system operation.