The TMA trip unit is adjustable from 300 A to 3000 A, letting you set the continuous current rating to match the protected conductor or load without swapping the breaker body. This is standard for distribution feeders and large motor branch circuits where the load current is known but may need field adjustment. The 400 A frame size means the breaker's physical housing and contacts are rated for up to 400 A continuous; the trip unit setting must not exceed the frame's rating, so the 3000 A maximum on the TMA is the trip-unit capability, not the frame's continuous capacity.
ABB XT5NU330ABYN000XXX NEXT5N 400 TMA 300-3000 3P FF UL
MPNXT5NU330ABYN000XXX
ABB NEXT5N 400 TMA 300-3000 3P FF UL, molded case circuit breaker, XT5N frame, three-pole, fixed thermal-magnetic adjustable trip unit 300-3000 A, line and load side termination.
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026
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Frequently asked questions
Where can I buy XT5NU330ABYN000XXX and how do I get a price?
The XT5NU330ABYN000XXX is sourced and quoted 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 XT5NU330ABYN000XXX's listed description (NEXT5N 400 TMA 300-3000 3P FF UL) on this component line?
The description is NEXT5N 400 TMA 300-3000 3P FF UL — a NEXT5N 400 frame, thermal-magnetic adjustable trip unit rated 300-3000 A, three-pole, fixed line and load termination, UL listed.
What compliance documentation does this brand provide for XT5NU330ABYN000XXX (RoHS, REACH, UL, IEC)?
The description includes a UL designation, indicating UL listing. RoHS, REACH, and IEC compliance documentation is typically available from ABB for the NEXT5N series; request specific declarations with your RFQ.
MPN
XT5NU330ABYN000XXX