Earth Terminals Designed to compliment the ’W’ screw series the screwless ’Z’ series DIN mounting terminals offers a top entry system that saves time and space. Quick & easy installation as the conductor is simply inserted by use of a clamping system. The top entry system means the conductor entry and clamp actuation access is from the same direction. Given a continuous temperature rating of 120°C, they are self-extinguishing to UL94V-0.