To protect terminal devices against transient overvoltages as fine device protection, test class III according to IEC 61643-1+A1, SPD type T3 according to EN 61643-11, high pre-fuse possible 63 A gL / C 63, auxiliary switch SPC-S-HK can be attached for remote signaling, no decoupling from the upstream overvoltage protection of the consumer system necessary
