{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"XT4LU3125BFF000XXX","brand":"ABB","brandSlug":"abb","productSlug":"XT4LU3125BFF000XXX","canonicalUrl":"https://aoctrl.com/abb/XT4LU3125BFF000XXX","factsUrl":"https://aoctrl.com/api/mcp/products/XT4LU3125BFF000XXX","rawCanonicalId":null},"summary":{"shortDescription":"ABB XT4L series, XT4LU3125BFF000XXX, 4-pole molded case circuit breaker, 20 A, 4 W, wall-mount.","salesMarkdown":"The ABB XT4LU3125BFF000XXX is a 4-pole molded case circuit breaker (MCCB) from the XT4L series, rated 20 A continuous current with 4 W power dissipation at rated load. The 20 A rating governs conductor sizing and upstream protective device coordination. The 4-pole configuration suits three-phase four-wire systems. The 4 W dissipation is the heat load at rated current. ## Deployment context and mounting Wall-mount construction means the breaker is designed for direct surface mounting on a panel backplate or enclosure wall, not DIN-rail snap-on. This is typical for larger frame MCCBs where bolted connections provide the mechanical stability needed for high-fault-duty terminations. The enclosure cutout and mounting-hole pattern should be verified against the ABB XT4L drilling template before panel fabrication. No last-time-buy or phase-out notice is on record. For BOM-freeze or project-bid purposes, the part is specifiable without an immediate obsolescence risk.","metaTitle":"ABB XT4LU3125BFF000XXX XT4L 4-Pole Circuit Breaker, 20 A","metaDescription":"ABB XT4LU3125BFF000XXX XT4L series 4-pole molded case circuit breaker rated 20 A, 4 W dissipation. Wall-mount. Current lifecycle stage. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Amps":"20","Poles":"4","title":"XT4LU3125BFF000XXX","Wattage":"4","Mounting":"Wall","description":"ABB XT4LU3125BFF000XXX XT4L 250TMA|ABB XT4LU3125BFF000XXX XT4L 2","lifecycle_stage":"current"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/a8ab85efb50d22348e487526972d2572.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is XT4LU3125BFF000XXX's listed amps and poles?","answer":"Rated 20 A continuous with 4 poles. The 4 W dissipation is the thermal loss at that rating."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/abb/XT4LU3125BFF000XXX","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/XT4LU3125BFF000XXX 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}}