The 282844-4: It uses a screw-driven rising cage clamp to terminate wires from 12-30 AWG against a tin-plated brass contact, with the wire entry oriented horizontally to the board. The 7.50 mm pitch leaves room between positions for the M3 screw and the clamp mechanism, which means the block can handle the 17.5 A per position without the adjacent terminals crowding the heat dissipation. The green polyamide (PA66) housing carries a 300 V rating, matching the typical panel-level distribution voltage inside an industrial control cabinet.
Wiring and Termination — What the Screw Torque Tells You
The rising cage clamp pulls the conductor up against a flat pressure plate when the M3 screw is tightened to 0.79 Nm (7.0 Lb-In). That torque spec is the key to a reliable termination — too little and the wire can pull out under vibration, too much and you strip the threads in the nylon housing. The brass screw and clamp are both nickel-plated, so the corrosion resistance is adequate for a dry indoor cabinet but not for a washdown environment.