Phoenix Contact, PT-IQ-2X2-5DC-UT 4 V ac, 6 V dc Maximum Voltage Rating 20kA Maximum Surge Current Surge Arrester, Suppressor Type: Surge Arrester Protection Module, Mounting Type: DIN Rail, Length: 17.7mm, Depth: 77.5mm, Height: 91mm, Dimensions: 17.7 x 77.5 x 91.1mm, Minimum Operating Temperature: -40°C, Maximum Operating Temperature: +70°C, MPN: 2800807