The ABB A50N2-30-11-84 is a NEMA-rated, 3-pole, non-reversing across-the-line contactor from the A50N series, with a 45 A continuous current rating and a 110-120 VAC coil. It includes one normally-open and one normally-closed auxiliary contact built in.
The 120 VAC coil means it pulls in on a standard control transformer; verify the coil's pick-up and drop-out voltage against your control circuit's actual voltage under load.
Deployment context
As a NEMA-style contactor, it mounts on a panel backplate rather than a DIN rail — expect a larger footprint than an IEC equivalent, but with the ruggedness and replaceable coils typical of NEMA designs. The 3-pole configuration handles three-phase motor circuits; the built-in auxiliary contacts (1 NO, 1 NC) cover basic interlocking or status feedback without adding a separate aux block.