ABB CA4-22M Auxilary Contact Block

The ABB CA4-22M Auxiliary Contact Block is a mechanical add-on that mounts to a contactor body, extending its switching operations with additional normally open or normally closed contacts. Attached directly to the contactor frame, the block moves in sync with the main contactor mechanism, engaging its own contact set the instant the primary part changes state, a point that matters in motor control and compressor circuits where auxiliary signaling supports interlocking or status indication in HVAC systems. Snapping the block into its mounting slot requires firm alignment with the contactor's coupling points.