{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"XT5HU340AFYN000XXX","brand":"ABB","brandSlug":"abb","productSlug":"XT5HU340AFYN000XXX","canonicalUrl":"https://aoctrl.com/abb/XT5HU340AFYN000XXX","factsUrl":"https://aoctrl.com/api/mcp/products/XT5HU340AFYN000XXX","rawCanonicalId":null},"summary":{"shortDescription":"ABB NEXT5H 400 molded case circuit breaker, XT5HU340AFYN000XXX, Ekip DIP LSI trip unit, 400 A, 3-pole, FF terminals, UL/CSA.","salesMarkdown":"The ABB XT5HU340AFYN000XXX is a NEXT5H 400 molded case circuit breaker (MCCB) fitted with an Ekip DIP LSI electronic trip unit, rated 400 A, 3-pole, with FF (flat-front) terminals and UL/CSA certification. The Ekip DIP LSI is a fixed, non-interchangeable trip unit offering L (long-time), S (short-time), and I (instantaneous) protection curves — no ground-fault element on this variant. The 400 A frame and 3-pole construction make it a straight fit for 3-phase feeder or main breaker duty in switchboards and panelboards where UL 489 listing is required. The 400 A continuous rating on a NEXT5H frame gives headroom for feeder circuits up to that ampacity without nuisance tripping. The Ekip DIP LSI trip unit's L (long-time) setting handles overloads with an adjustable pickup and time delay; S (short-time) provides selectivity with downstream breakers by delaying the trip on moderate faults; I (instantaneous) clears high-level faults fast. No ground-fault protection on this LSI variant — if GF is needed, you'd step to the LSIG version. The FF (flat-front) terminal design accepts standard bus bar or cable connections; the 3-pole format matches 3-phase systems. UL/CSA listing means it's accepted in North American panels without additional agency review. Mounts in the standard NEXT5H 400 frame footprint — same cutout and drilling pattern as other breakers in the NEXT5H family. The FF terminals are flat-front, so bus bar connections land without special adapters. Verify the line/load lug wire range against your cable size before terminating; the frame accepts copper or aluminum conductors within the UL-listed range. No DIN-rail mounting on this frame size — it bolts directly to the panel backplate or mounting base.","metaTitle":"ABB XT5HU340AFYN000XXX NEXT5H 400 Ekip DIP LSI 400A 3P FF UL","metaDescription":"ABB XT5HU340AFYN000XXX NEXT5H 400 molded case circuit breaker, Ekip DIP LSI trip unit, 400 A, 3-pole, FF terminals, UL/CSA. Lifecycle stage current — sourced to order against an RF","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"lifecycle_stage":"current"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/XT5HU340AFYN000XXX/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for XT5HU340AFYN000XXX?","answer":"Sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time."},{"question":"What is XT5HU340AFYN000XXX's listed description?","answer":"The listed description is NEXT5H 400 Ekip DIP LSI IN400 3P FF UL/C — a 400 A, 3-pole molded case circuit breaker with Ekip DIP LSI trip unit, flat-front terminals, and UL/CSA certification."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/abb/XT5HU340AFYN000XXX","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/abb/XT5HU340AFYN000XXX when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}