{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"XT5LU340AEFF000XXX","brand":"ABB","brandSlug":"abb","productSlug":"XT5LU340AEFF000XXX","canonicalUrl":"https://aoctrl.com/abb/XT5LU340AEFF000XXX","factsUrl":"https://aoctrl.com/api/mcp/products/XT5LU340AEFF000XXX","rawCanonicalId":null},"summary":{"shortDescription":"ABB XT5LU series molded case breaker, 400 A, 600 VAC, 3-pole, XT5LU340AEFF000XXX with EKIP LS/I electronic trip unit, 400 A frame, front terminals.","salesMarkdown":"The XT5LU340AEFF000XXX is a 400 A, 600 VAC, 3-pole molded case breaker in the ABB XT5LU series, fitted with an EKIP LS/I electronic trip unit and front terminals on a 400 A frame. The 600 VAC rating covers line-to-line voltages up to that level. The 3-pole configuration handles three-phase circuits. The EKIP LS/I trip unit provides adjustable long-time and short-time protection, plus instantaneous pickup. The closest peer is the XT5NU340ABNF000XXX, also a 400 A, 3-pole molded case breaker but rated for 690 VAC instead of 600 VAC. The XT5NU variant uses a different trip unit (ABNF vs. EKIP LS/I) and likely a different frame suffix. If your panel was specified around the XT5NU340ABNF000XXX, the XT5LU340AEFF000XXX will not drop in without checking the trip-unit coordination and voltage rating — the 600 VAC limit is the hard ceiling. For a 480 V or 600 V system the XT5LU works; for a 690 V system you need the XT5NU.","metaTitle":"XT5LU340AEFF000XXX Molded Case Breaker, 400A 600VAC 3P","metaDescription":"XT5LU340AEFF000XXX molded case breaker, 400 A, 600 VAC, 3-pole, XT5LU frame with EKIP LS/I trip unit. Current lifecycle stage. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Amps":"400","Type":"Breaker; Molded Case","Poles":"3","title":"XT5LU340AEFF000XXX","Volts AC":"600","description":"Breaker, Molded Case, 400A, 600VAC, 3P, XT5LU, EKIP LS/I, 400A Frame|Breaker, Molded Case, 400 Amp, 600 Volt AC, 3-Pole, XT5LU, EKIP LS/I, 400 Amp Frame, Front Terminals","lifecycle_stage":"current"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/ac6aa49799807b5ff6fdae90f843bac0.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is XT5LU340AEFF000XXX's listed amps (400) on this component line?","answer":"The listed continuous current rating is 400 A, which is the maximum current the breaker carries without tripping under normal conditions."},{"question":"What is XT5LU340AEFF000XXX's listed type (Breaker; Molded Case) on this component line?","answer":"The type is listed as Breaker; Molded Case, meaning it is a molded case circuit breaker (MCCB) for industrial distribution panels."},{"question":"Will XT5LU340AEFF000XXX drop into a panel that was specified around XT5NU340ABNF000XXX without rewiring?","answer":"No — the XT5LU340AEFF000XXX is rated for 600 VAC versus 690 VAC on the XT5NU variant, and uses a different trip unit (EKIP LS/I vs. ABNF). The physical footprint may be similar, but the voltage ceiling and trip coordination differ. Verify the panel's voltage and trip settings before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/abb/XT5LU340AEFF000XXX","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/XT5LU340AEFF000XXX 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}}