The ABB AF205B-30-22RT-12 is a three-pole contactor rated for 300 A, with a dual-rated 48-130 VAC/DC coil. That coil voltage range covers common control voltages across both AC and DC systems — 48 V, 110 V, 120 V, and 130 V — so it slots into a panel running 48 VDC PLC outputs or 120 VAC relay logic without needing a separate coil variant.
What the 300 A rating means for fit
For motor loads, the actual AC-3 rating (switching squirrel-cage motors) will be lower, typically around 250-270 A depending on the manufacturer's derating curve. That means this contactor is sized for a motor drawing roughly 250 A full-load, which on 400 V three-phase is around 170 kW. For resistive heating or lighting loads (AC-1 duty), it can handle the full 300 A continuous.