{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"XT1NU4050AAA000XXX","brand":"ABB","brandSlug":"abb","productSlug":"XT1NU4050AAA000XXX","canonicalUrl":"https://aoctrl.com/abb/XT1NU4050AAA000XXX","factsUrl":"https://aoctrl.com/api/mcp/products/XT1NU4050AAA000XXX","rawCanonicalId":null},"summary":{"shortDescription":"ABB XT1N series, molded case circuit breaker, XT1NU4050AAA000XXX, 125 A frame, TMF 50-500 A thermal-magnetic trip, 4-pole, UL/CSA listed.","salesMarkdown":"The ABB XT1NU4050AAA000XXX is a molded case circuit breaker from the XT1N series, built on a 125 A frame with a TMF (thermal-magnetic fixed) trip unit adjustable from 50 to 500 A. The 4-pole configuration with front terminals and UL/CSA listing makes it a drop-in for North American panelboards and switchgear assemblies where a 4-pole MCCB is required for line-to-neutral or dual-fed applications. The 125 A frame with a TMF trip adjustable 50–500 A covers motor branch circuits and feeder protection where the continuous current falls within that band. The thermal-magnetic element provides instantaneous magnetic pickup for short-circuit protection and a thermal inverse-time curve for overloads — standard for general-purpose distribution and motor control center (MCC) feeders. The 4-pole variant switches the neutral, which is required in North American separately derived systems (per NEC 230.95) or where 4-wire feeders need full isolation. The UL/CSA listing confirms acceptance in the U.S. and Canadian markets without additional agency review.","metaTitle":"ABB XT1NU4050AAA000XXX XT1N 125A TMF 50-500 4P F F UL/CSA","metaDescription":"ABB XT1NU4050AAA000XXX molded case circuit breaker, XT1N 125A frame, TMF 50-500 A trip, 4P, UL/CSA. Lifecycle stage: current. 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":{"lifecycle_stage":"current"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/XT1NU4050AAA000XXX/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy XT1NU4050AAA000XXX and how do I get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Submit an RFQ for current availability and pricing — no stock count or price is listed here."},{"question":"What is XT1NU4050AAA000XXX's listed description?","answer":"The description is XT1N 125 TMF 50-500 4P F F UL/CSA, meaning a 125 A frame, TMF trip adjustable 50–500 A, 4-pole, front terminals, front terminals (F F), UL/CSA listed."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/abb/XT1NU4050AAA000XXX","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/XT1NU4050AAA000XXX when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}