{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"XT5HU340ANFF000XXX","brand":"ABB","brandSlug":"abb","productSlug":"XT5HU340ANFF000XXX","canonicalUrl":"https://aoctrl.com/abb/XT5HU340ANFF000XXX","factsUrl":"https://aoctrl.com/api/mcp/products/XT5HU340ANFF000XXX","rawCanonicalId":null},"summary":{"shortDescription":"ABB XT5H series molded case circuit breaker, XT5HU340ANFF000XXX, 400 A, three-pole, TMG trip unit, 400-2000 A adjustable, FF UL.","salesMarkdown":"The FF UL suffix indicates a fixed front-connection design listed to UL standards — the same breaker that goes into a UL 489 panelboard or switchboard lineup. Rated 400 A continuous, it handles feeder and large motor branch protection in commercial and industrial distribution. The 400 A continuous rating governs the conductor sizing and the upstream feeder breaker coordination — this is the frame rating, not the trip setting. The TMG unit's adjustable thermal pickup (400–2000 A) lets you dial the long-time and short-time protection to match the load without swapping the breaker body. Three-pole construction suits three-phase 480Y/277 V or 600 V delta systems common in North American panelboards. The FF (fixed front-connection) terminals accept standard bus bar or cable lug connections; plan for a fixed-mount footprint in the switchboard, not a plug-in cradle.","metaTitle":"ABB XT5HU340ANFF000XXX XT5H Molded Case Circuit Breaker, 400","metaDescription":"ABB XT5HU340ANFF000XXX XT5H 400 TMG 400-2000 3P FF UL molded case circuit breaker. Lifecycle stage: current. Sourced to order against an RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"title":"XT5HU340ANFF000XXX","description":"XT5H 400 TMG 400-2000 3P FF UL|XT5H 400 TMG 400-2000 3P FF UL","lifecycle_stage":"current"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/f55f74ad4ca196681ba68d9008d8e7ad.pdf","sourceUrl":null},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/abb/XT5HU340ANFF000XXX","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/XT5HU340ANFF000XXX when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}