The ABB A2N225TW is a molded case circuit breaker (MCCB) from the A2N 250 series, fitted with a TMF 225-2250 3 thermal-magnetic trip unit.
MCCBs of this class are installed in distribution panels and switchboards to protect cables and downstream equipment against overloads and short circuits. The A2N 250 frame size typically handles feeder circuits in commercial and industrial installations up to 250 A.