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ABB XT5HQ340ABFF000XXX — Molded Case Circuit Breakers (MCCB)

ABB XT5HQ340ABFF000XXX XT5H 400A Molded Case Circuit Breaker

MPNXT5HQ340ABFF000XXX

ABB XT5H series molded case circuit breaker, 400 A frame, TMA 400-4000 A electronic trip unit, 3-pole, fixed front terminals, UL 100/ABB listing, order code XT5HQ340ABFF000XXX.

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

Product details

400 A Frame, TMA Trip — What the Description Tells You

The ABB XT5HQ340ABFF000XXX is a 3-pole molded case circuit breaker from the XT5H series, with a 400 A frame and a TMA 400-4000 A electronic trip unit. The "FF" suffix indicates fixed front terminals, which simplifies panel wiring: the breaker mounts to the busbar and the line/load cables land on the front-face lugs, not on rear studs or plug-in bases. The "UL 100/ABB" marking confirms UL 489 listing for the US market, so this breaker is accepted for branch-circuit protection in North American panels.

Frequently asked questions

Where can I buy XT5HQ340ABFF000XXX and get a price?

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

What does the description XT5H 400 TMA 400-4000 3P FF UL 100/ABB mean?

It decodes as: XT5H series, 400 A frame, TMA (thermal-magnetic-adjustable) trip unit with an adjustable continuous current range of 400 to 4000 A, 3-pole, FF (fixed front terminals), UL 489 listed for the US market under the ABB brand.

What compliance documentation does ABB provide for this breaker?

The UL 100/ABB marking on the description confirms UL 489 listing for branch-circuit protection in North America. ABB typically provides a Declaration of Conformity for CE marking (IEC 60947-2) and a RoHS compliance statement for the European market, though specific documentation should be requested at quote time to confirm it covers the exact serial number delivered.

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XT5HQ340ABFF000XXX