{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"XT5HQ340AEFF000XXX","brand":"ABB","brandSlug":"abb","productSlug":"XT5HQ340AEFF000XXX","canonicalUrl":"https://aoctrl.com/abb/XT5HQ340AEFF000XXX","factsUrl":"https://aoctrl.com/api/mcp/products/XT5HQ340AEFF000XXX","rawCanonicalId":null},"summary":{"shortDescription":"ABB, XT5H series, Molded Case Breaker, 400 A, 600 VAC, 3-pole, EKIP DIP LS/I trip unit, 400 A frame, order code XT5HQ340AEFF000XXX.","salesMarkdown":"## What this 400 A molded-case breaker does The ABB XT5HQ340AEFF000XXX is a 3-pole molded-case breaker rated 400 A continuous at 600 VAC, built on the XT5H frame and fitted with an EKIP DIP LS/I electronic trip unit. The 400 A frame means the breaker body itself is sized for that current — no adapter needed for a 400 A feed. The EKIP DIP LS/I provides LS/I protection (long-time and short-time delay plus instantaneous), giving you adjustable pickup and time bands for coordinating with downstream feeders or motor loads. At 600 VAC it covers the common 480 V and 600 V distribution voltages in North American industrial panels without derating. ## What the 400 A rating means for fit It is not a motor full-load current; for a motor branch circuit you would size the breaker per the NEC motor tables, typically 250 % of FLA for an inverse-time breaker. On a 480 V feeder feeding a 400 A continuous load, this breaker holds without nuisance tripping. The EKIP DIP LS/I trip unit lets you dial in the long-time pickup (typically 0.4–1.0 × In) and short-time delay to coordinate with downstream breakers, so you can clear a fault at the branch without taking out the main. The 3-pole configuration accepts three line conductors and three load conductors; the neutral is not switched. Wire range for the line and load terminals typically accepts up to 500 kcmil copper or aluminum — verify the lug kit if the install uses aluminum conductors. The EKIP DIP LS/I trip unit is front-accessible for adjustment without removing the cover, so you can set the long-time and short-time bands after installation.","metaTitle":"ABB XT5HQ340AEFF000XXX Molded Case Breaker, 400A 600VAC 3P","metaDescription":"ABB XT5HQ340AEFF000XXX molded case breaker, 400 A, 600 VAC, 3-pole, XT5H frame with EKIP DIP LS/I trip unit. Current-production part 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":{"Amps":"400","Type":"Breaker; Molded Case","Poles":"3","title":"XT5HQ340AEFF000XXX","Volts AC":"600","description":"Breaker, Molded Case, 400A, 600VAC, 3P, XT5H, EKIP DIP LS/I, 400A Frame|Breaker, Molded Case, 400 Amp, 600 Volt AC, 3-Pole, XT5H, EKIP DIP LS/I, 400 Amp Frame","lifecycle_stage":"current"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/8a3df37ea3987d49f711a1729b421b74.pdf","sourceUrl":null},"ai":{"faq":[{"question":"How do I get current pricing and availability for XT5HQ340AEFF000XXX?","answer":"Submit an RFQ against this order code. Availability and current pricing are confirmed at quote time through independent distribution; the part is sourced to order, not held on consignment."},{"question":"What is XT5HQ340AEFF000XXX's listed amps (400) on this component line?","answer":"The breaker is rated 400 A continuous at 600 VAC, 3-pole. That is the frame rating and the continuous current rating at 40 °C ambient."},{"question":"What is XT5HQ340AEFF000XXX's listed type (Breaker; Molded Case) on this component line?","answer":"It is a molded-case breaker — the XT5H series, 400 A frame, with an EKIP DIP LS/I electronic trip unit. Molded-case means the breaker body is an insulating enclosure that contains the contacts, arc chutes, and trip mechanism in one sealed unit."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/abb/XT5HQ340AEFF000XXX","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/XT5HQ340AEFF000XXX 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}}