BUSSMANN BSPS1690WER Surge Protection Device, 1 Phase, 690V. More details: Surge Protection Device, Type 4, Location Type Type 2, Nominal Discharge Current 25kA, Voltage 690V, Phase 1, Wire 2, Number of Poles 1Max. Continuing Operating Voltage 760VModes of Protection L-Gnd/N, Mounting Style DIN-RailEnclosure Type IP20Wire Gauge 1-6AWGLength 6.26, Width 1.42, Depth 2.6, Standards IEC 61643-1