ABB XT4HU3225AJJ000XXX is a current-production XT4H molded-case circuit breaker with a TMF 225-2250 A thermal-magnetic trip unit. Three poles, line/load side lugs, UL/CSA marked. The 250 A frame carries the TMF trip set at 225 A adjustable to 2250 A — covers motor and feeder protection in one block.
What the ratings mean for fit
The TMF 225-2250 A trip is the key spec for a buyer: it's a thermal-magnetic adjustable unit, so you set the continuous current anywhere from 225 A to 2250 A via the dial. That covers a wide motor or feeder load without swapping the breaker body. The 250 A frame (XT4H) is the physical envelope — it dictates panel cutout and bus connection spacing. UL/CSA listing means it's accepted for US and Canadian installations without extra agency review.
Where it's used
This MCCB lands in industrial switchboards, motor control centers, and distribution panels where a 250 A frame with adjustable thermal-magnetic protection is needed. The three-pole configuration handles three-phase loads — motors, pumps, compressors, feeder circuits. The UL/CSA mark lets it go straight into a North American panel schedule without a separate evaluation.