The ABB A1N050TW is a 3-pole molded case circuit breaker (MCCB) from the A1N 100 TMF 50-500 series, rated at 50 A. It's a thermal-magnetic breaker designed for branch circuit protection in industrial distribution panels, motor control centers, and switchboards — the kind of install where you need adjustable thermal and fixed magnetic trip curves to handle motor inrush or feeder starts without nuisance tripping.
The A1N 100 frame accepts plug-in or fixed mounting in ABB switchboard bases and panelboard interiors. Three-pole configuration with line and load lugs for copper or aluminum conductor termination. Thermal-magnetic trip (TMF) covers the 50-500 A range; the 50 A rating on this unit suits feeder circuits feeding downstream subpanels or larger motor loads where a 50 A protective device is called out on the one-line.