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ABB XT1NU3125AFD000XXX — Molded Case Circuit Breakers (MCCB)

ABB XT1NU3125AFD000XXX XT1N 125 TMF 125-1250A 3P F F UL/CSA

MPNXT1NU3125AFD000XXX

ABB, XT1N series, molded case circuit breaker, XT1NU3125AFD000XXX, 3-pole, TMF 125-1250A trip unit, UL/CSA listed.

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Product details

The ABB XT1NU3125AFD000XXX is a 3-pole molded case circuit breaker (MCCB) from the XT1N 125 frame series, fitted with a TMF 125-1250A thermal-magnetic fixed trip unit. The description confirms UL and CSA listing, which governs acceptance in North American panelboards and switchgear. The TMF trip provides thermal overload protection (inverse-time) and magnetic short-circuit protection (instantaneous), sized for the 125-1250A range — meaning the trip unit is set for a specific ampere rating within that band, not field-adjustable across the full span.

The XT1N 125 frame is a compact MCCB designed for 125 A maximum continuous current at 40 °C, though the TMF trip unit on this variant is specified for the 125-1250A range — the actual trip rating must be verified from the nameplate or factory setting, as the order code alone does not resolve the exact ampere trip. The 3-pole configuration suits three-phase circuits. UL 489 listing means it is certified for branch-circuit protection in North America; CSA C22.2 No. 5 covers the same for Canada.

Frequently asked questions

What is the closest alternative to XT1NU3125AFD000XXX in the same family?

Within the XT1N 125 frame, the closest sibling would be a variant with a different trip unit type (e.g., TMD vs TMF) or a different ampere rating. The TMF trip is thermal-magnetic fixed; a TMD trip is also thermal-magnetic but with a different curve. The deciding factor is the specific trip rating and curve required by the load — no pin-compatible alternative exists without changing the trip unit.

Where can I buy XT1NU3125AFD000XXX?

This part is sourced through independent industrial distribution and quoted to order against an RFQ. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm commitment.

What compliance documentation does ABB provide for XT1NU3125AFD000XXX?

The listing confirms UL and CSA certification. ABB typically provides a Declaration of Conformity for CE marking, RoHS, and REACH compliance upon request through the supply channel. The specific documentation set should be requested at quote time.

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