{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"XT5HU340AYFF000XXX","brand":"ABB","brandSlug":"abb","productSlug":"XT5HU340AYFF000XXX","canonicalUrl":"https://aoctrl.com/abb/XT5HU340AYFF000XXX","factsUrl":"https://aoctrl.com/api/mcp/products/XT5HU340AYFF000XXX","rawCanonicalId":null},"summary":{"shortDescription":"ABB XT5H series, 400 A breaking part, 3-pole, fixed front terminals, UL/CSA+TU, XT5HU340AYFF000XXX.","salesMarkdown":"The ABB XT5HU340AYFF000XXX is a 400 A breaking part from the XT5H molded-case switch-disconnect family, configured as a 3-pole unit with fixed front terminals and UL/CSA+TU certification. It's the internal switching mechanism — the interrupting guts — that mounts inside the XT5H enclosure, not a standalone breaker with a handle. On a panel build, this is the piece that gets wired into the line side and load side of the disconnect; the handle and shaft assembly are ordered separately. The description reads XT5H 400 BREAKING PART 3P F F UL/CSA+TU. Breaking part means it's the internal contact and arc-chamber assembly — not a complete disconnect switch. 3P is three-pole. F F stands for fixed front terminals (the line and load connections are bolted, not plug-in). UL/CSA+TU tells you it carries UL and CSA certification plus a TU (Türkiye) market approval, so it's accepted in North American and Turkish installations without a separate evaluation. ## Integration note for the panel builder This breaking part is designed to fit into the ABB XT5H molded-case switch-disconnect frame. The fixed front terminals accept standard busbar or cable lugs; terminal torque specs follow the XT5H installation manual. Because it's a breaking part only, the handle, shaft, and door interlock are separate line items. On a DIN-rail or backplate layout, plan for the XT5H's overall depth and the handle projection through the enclosure door.","metaTitle":"ABB XT5HU340AYFF000XXX XT5H 400A Breaking Part, 3P F F UL/CS","metaDescription":"ABB XT5HU340AYFF000XXX XT5H 400A breaking part 3P F F UL/CSA+TU. Lifecycle stage current. Sourced to order against RFQ. Get pricing and availability at quote time.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"title":"XT5HU340AYFF000XXX","description":"XT5H 400 BREAKING PART 3P F F UL/CSA+TU|XT5H 400 BREAKING PART 3P F F UL/CSA+TU","lifecycle_stage":"current"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/7877bfeeeeab92758b4e1cdd5ee92803.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy XT5HU340AYFF000XXX and get current pricing?","answer":"We source this breaking part to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ and we'll come back with a firm number and lead-time estimate."},{"question":"What is the closest alternative to XT5HU340AYFF000XXX in the XT5H family?","answer":"The XT5H family includes breaking parts in different current ratings and pole configurations. This specific order code is a 400 A, 3-pole, fixed-front-terminal variant with UL/CSA+TU approvals. A different current rating or terminal style (plug-in vs. fixed front) would be a different order code — no direct pin-compatible drop-in exists without changing the rating or certification scope."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/abb/XT5HU340AYFF000XXX","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/XT5HU340AYFF000XXX 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}}