Surge Protecitve Device, Surge Protector, Surge Arrester, Surge Arrestor, Lightning Protector, SPD 1. Working voltage: 255V/275V/320V/385V/420V/440V/ ... /40kA4. Protection class: C5. Composite type: 1P, 1P+N, 1+NPE, 2P+N, 3P+N, 3P+NPE6. Voltage protection level (Up): < 0.8kV ...