The ABB AF52-30-00-11 is a three-pole contactor rated for 54 A continuous current, with a 100 A across-the-line rating and a 24-60 V AC/DC coil. The wide coil range means it can be wired into control circuits that supply 24 VDC or 48-60 VAC without needing a separate coil-voltage variant — a single part number covers multiple panel builds.
The 54 A continuous rating suits motor loads up to roughly 22 kW at 400 VAC (AC-3 duty) or resistive heating banks. The 100 A across-the-line figure is the maximum non-switching current the main poles can carry continuously — useful for infrequent isolation of a high-inrush load.