It carries a TMF 150-1500 A thermal-magnetic trip unit, 3-pole configuration, with front-face terminals and UL/CSA certification.
The TMF 150-1500 A trip means the breaker's thermal element responds to sustained overloads in that range, while the magnetic element handles short-circuit faults. The XT4N 250 frame is the physical envelope — panel builders need to verify that the 3-pole footprint matches the existing mounting and bus-bar arrangement. UL/CSA listing means it is accepted for US and Canadian installations under NEC and CEC, so it slots into a panel that requires listed overcurrent protection.