The ABB XT3SU3150AFJ000XXX is a molded case circuit breaker from the XT3S series, carrying the description XT3S 225 TMF 150-1500 3P F F UL/CSA. This 3-pole unit is built for UL and CSA applications, meaning it's certified for North American panel builds where those standards govern the installation.
The description XT3S 225 TMF 150-1500 3P F F UL/CSA breaks down as: XT3S series, 225 A frame size, TMF trip unit (thermal-magnetic fixed), adjustable from 150 to 1500 A, 3-pole, with front terminals (F F), and UL/CSA certification. The TMF trip unit gives you a fixed thermal curve for overload protection and a magnetic trip for short circuits, with the adjustment band letting you dial in the continuous current rating for the specific load.