The TMF 40-500 A trip unit means the thermal-magnetic element is adjustable or fixed within that range — in this variant it is a fixed 40-500 A setting, so the breaker will trip on overload at the factory-set point and on short-circuit via the magnetic instantaneous element. This is a standard MCCB for branch circuit protection in panelboards, switchboards, and motor control centers where UL 489 or CSA C22.2 No. 5 compliance is required.
ABB XT1HU3040AAA000XXX Molded Case Circuit Breaker, 125 A Fr
MPNXT1HU3040AAA000XXX
ABB XT1H series molded case circuit breaker, order code XT1HU3040AAA000XXX, 125 A frame, TMF 40-500 A thermal-magnetic fixed trip, 3-pole, line/load side lugs, UL/CSA certified.
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026
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Frequently asked questions
Where can I buy XT1HU3040AAA000XXX and how do I get a price?
This part is sourced through independent distribution channels. Submit an RFQ for current pricing and availability — confirmed at quote time.
What is the closest alternative to XT1HU3040AAA000XXX in this family?
Within the ABB XT1H series, other order codes differ by trip unit type (TMF vs. TM) or ampere rating. The closest functional equivalent would share the same 125 A frame and 3-pole configuration but with a different trip range. Verify the exact trip setting needed before substituting.
MPN
XT1HU3040AAA000XXX