The ABB XT4LU3125AFF00NXXX is a 3-pole molded case circuit breaker from the XT4L series, fitted with a TMF 125-1250 thermal-magnetic fixed trip unit on a 250 A frame. The description confirms UL/CSA listing, so it is wired for North American panel builds where the breaker serves as the main disconnect or feeder protection in a distribution board.
ABB XT4LU3125AFF00NXXX XT4L 250 TMF 125-1250 3P F F UL/CSA,
MPNXT4LU3125AFF00NXXX
ABB XT4L series, XT4LU3125AFF00NXXX, 250 A frame, TMF 125-1250 trip unit, 3-pole, fixed, fixed, UL/CSA.
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026
Product details
Frequently asked questions
What is the description for XT4LU3125AFF00NXXX?
The description is XT4L 250 TMF 125-1250 3P F F UL/CSA, indicating a 250 A frame, TMF 125-1250 A trip unit, 3-pole, fixed front terminals, fixed rear terminals, and UL/CSA certification.
Where can I buy XT4LU3125AFF00NXXX?
This part is sourced to order against an RFQ through independent distribution. Submit a request for current pricing and availability.
MPN
XT4LU3125AFF00NXXX