1,CE,TUV,UL Certification & Test Report 2,Voltage Surge Protector,spd,Surge Protection 3,quick response; 4,In= ... /3PNVB40/275/3PNOrder No. Protection LevelB LEVELMax. Continuous AC voltage Uc385V275VMax. Continuous DC voltage Uc500V350VNominal discharge current In (L-N L-PE)40KA ... . discharge current Imax (N-PE)80KA(8/20μs)Limit voltage Up2.3KV1.8KV surge protector(surge protection device,spd)