electrical suppressor/thound protector, Surge Arrester, Surge Arrestor, Lightning Protector, SPD 1. Working voltage: 255V/275V/320V/385V/420V/440V/ ... . Max. discharge current (8/20us) Imax: 30kA/40kA4. Protection class: C5. Composite type: 1P, 1P+N, 1+NPE, 2P+N, 3P ... to IEC61643-1, GB18802.111. CE Mark electrical suppressor/thound protector