ABB XT1SU3050AFF000XXX XT1S Molded Case Circuit Breaker, TMF

The TMF trip unit covers a 50–500 A continuous current range, so it protects feeder or branch circuits within that window. The 3-pole configuration suits three-phase loads — motor branch circuits, distribution panels, or main incomers — in UL 489 or CSA C22.2 No. 5 applications. The XT1S frame is a compact, fixed-format breaker designed for DIN-rail or panel-mount integration inside industrial control enclosures. The UL/CSA mark means it is accepted for US and Canadian installations without additional agency review.