The TMF 225-2250 designation indicates a thermal-magnetic trip unit with an adjustable magnetic trip range from 225 A to 2250 A — that's 1x to 10x In, sized for motor-start inrush or high-fault branch circuits. The 3-pole configuration handles three-phase loads up to 480Y/277 VAC (typical UL 489 rating for this frame). The F F suffix denotes fixed thermal and fixed magnetic trip settings, so no field adjustment of the overload curve is possible; the part ships with the factory-calibrated trip point.
ABB XT3SU3225AFA000XXX XT3S 225 TMF 225-2250 3P F F UL/CSA,
MPNXT3SU3225AFA000XXX
ABB XT3S 225 molded case switch, 225 A TMF 225-2250, 3-pole, F F, UL/CSA, order code XT3SU3225AFA000XXX.
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026
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What is XT3SU3225AFA000XXX's listed description?
The description is XT3S 225 TMF 225-2250 3P F F UL/CSA, indicating a 225 A frame, thermal-magnetic trip unit with 225-2250 A adjustable magnetic range, 3-pole, fixed thermal and fixed magnetic settings, UL and CSA listed.
MPN
XT3SU3225AFA000XXX