The ABB AF261B1-CC11J9 is a combination starter — a single unit that packs a circuit breaker and a contactor together for motor branch circuits. It handles three-phase loads, with the control circuit tapped at 120V from the 480V line. That N1 designation means the control transformer is wired for a 480V primary and a 120V secondary, so you don't need a separate control power supply.
Mounts on DIN rail — standard 35 mm symmetrical rail. The AF26 footprint is compact for a combination starter: breaker and contactor stacked vertically, so it fits a single unit-width slot in the panel. Verify the gland plate clearance for the power wiring; the line and load terminals are front-accessible. The control transformer is factory-wired for 480/120V; if you need a different tap, ABB offers field-changeable options, but this variant ships ready for that ratio.