Phoenix Contact 3035483 To determine the current and voltage of a terminal block, refer to the type of plug used. The maximum rated voltage is 500 V, with an allowed continuous thermal current of 28 A. Connection methods include spring-cage connection, while the cross-sectional area can range from 0.08 mm2 to 6 mm2. The mounting type accepted for this terminal block includes NS 35/7,5 and NS 35/15, and it is typically colored gray.