Phoenix Contact PT 1.5 PCB Terminal Blocks. A range of green, Phoenix Contact terminal blocks from the PT 1.5 range. The through-hole terminal blocks are used to secure and terminate wires. Individual terminals use a screw to tighten the wire to make an electrical connection. Features and Benefits. Maximum contact force gives low-temperature rise High capacity thanks to the rectangular block space Can accommodate a wide range of wire sizes Reliable connection provided Various numbers of positions can be combined due to the latching on the sides 3.5 mm and 5 mm pitch available