Surge Protective Device,SPD *Poles:1P, 2P, 3P, 4P, 1P+N, ... , 3P+NPE *Nominal discharge current (8/20us) (In):5kA,10kA Surge Protective Device,SPDSurge Protector circuit breaker( protective SPD Place of Origin: ChinaSpecifications ... voltage (Uc): 255V - 440V4) Nominal discharge current (8/20μs) (In): 5kA, 10kA5) Max. Discharge current (8/20μs) (Imax): 10kA ...