Phoenix Contact, S-PT-EX-48DC-1/2 37 V ac, 53 V dc Maximum Voltage Rating 20kA Maximum Surge Current Surge Arrester, Suppressor Type: Surge Arrester Protection Module, Mounting Type: Screw Mount, Length: 28mm, Depth: 79mm, Dimensions: 28 x 79 x 28mm, Minimum Operating Temperature: -40°C, Maximum Operating Temperature: +80°C, MPN: 2800054