Surge Protection Device, Modular Din-rail, Voltage 120, Amps 20, UL 1449 Clamping Volts 500, Max. Surge Current 50kA, Wire 2, Number of Poles 1, Phase 1, Hz 50/60 Hz, Wire Gauge 6 -14 AWG, Enclosure Type IP20, Mounting Style Din-rail, Color Grey, Length 3.58 In., Width 0.7 In., Depth 2.7 In., Standards UL1449 3rd Edition/ IEC 61643, Includes Installation Instruction.