Surge Protection Device Modular Din-Rail Location Type Type 4 Nominal Discharge Current 20kA Voltage 277/480 Phase 3Y Wire 5 Number of Poles 4 Max Surge Current Per Phase 50kA Max Surge Current Per Mode 50 kA Max Continuing Operating Voltage 320/640 Voltage Protection Rating 1000V (L-N) 1500V (L-G) 500V (N-G) 1800V (L-L) Short Circuit Current Rating 200 kA Modes of Protection L-N L-G N-G L-L Mounting Style DIN-Rail Material of Construction Polyethelene Terphthalate