The ABB AF261B1-CE11J9 is an AF26-series non-reversing three-pole contactor, listed as a current-production part. It's sized for a 3-pole power circuit, non-reversing configuration — so it handles straightforward on/off motor or resistive loads without the interlocked pair for direction change. On a DIN-rail panel, this is the component that closes the line to the load when the coil pulls in.
The listing reads AF26,NR,3PH,CB,N — that decodes as AF26 frame, non-reversing, three-phase, contactor, no enclosure. So it's a bare device for panel integration, not a pre-wired or enclosed starter. The NR designation means you don't get the mechanical interlock for reversing; if your application needs forward/reverse, you'd pair two of these with an external interlock kit.