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ABB XT1NU3040AFF000XXX — Molded Case Circuit Breakers (MCCB)

ABB XT1NU3040AFF000XXX Tmax Breaker Frame, 125 A, 3-Pole

MPNXT1NU3040AFF000XXX

ABB Tmax XT1N frame breaker, 125 A thermal-magnetic fixed trip, 3-pole, frame mount, front flat terminals.

ABB XT1NU3040AFF000XXX datasheet (PDF)
StockContact for availability
MOQ1 pcs
Sourced new & surplus through independent channelsListing updated Jul 2026

Specifications

Specifications

XT1NU3040AFF000XXX — Specifications
ParameterValue
Amps125
Poles3
MountingFrame

Product details

What this breaker is and what the ratings mean

The ABB XT1NU3040AFF000XXX is a Tmax XT1N frame-size molded-case circuit breaker rated 125 A continuous, with a fixed thermal-magnetic trip unit adjustable from 40 to 500 A. The 3-pole configuration suits three-phase distribution and motor branch circuits. Frame mounting means it bolts into a panel or switchboard — not a DIN-rail snap-on — so plan for drilling and bus-bar connections. The front flat terminals accept standard cable lugs or bus bars, typical for main or feeder breaker positions in industrial power panels.

Integration context

Mounts in a panel via its frame footprint — not a plug-in or DIN-rail base. The fixed front flat terminals simplify bus-bar or cable-lug connections for main or feeder positions.

Frequently asked questions

Where can I buy XT1NU3040AFF000XXX and how do I get a price?

It is sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time.

What is XT1NU3040AFF000XXX's listed amps (125) on this component line?

The listed continuous current rating is 125 A. The fixed thermal-magnetic trip unit is adjustable from 40 to 500 A, so the 125 A frame can be set lower for cable or load protection.

What is XT1NU3040AFF000XXX's listed poles (3) on this component line?

It is a 3-pole breaker, meaning it switches and protects all three phases of a three-phase circuit.

What compliance documentation does this brand provide for XT1NU3040AFF000XXX (RoHS, REACH, UL, IEC)?

ABB typically provides RoHS and REACH declarations, plus UL and IEC certifications for the Tmax XT1N series. Specific documentation for this order code is available upon request with the RFQ.

MPN
XT1NU3040AFF000XXX