1,CE,TUV,UL Certification & Test Report 2,spd,surge suppressor,Surge Protection 3,quick response; MODELVB40/385/1P1VB40/275/1P1Order No. Protection LevelB LEVELMax. Continuous AC voltage Uc385V275VMax. Continuous DC voltage Uc500V350VNominal discharge current In (L-N L-PE)40KA(8/20μs)Max. discharge current Imax (N-PE)80KA(8/20μs)Limit voltage Up2.3KV1.8KV surge suppressor