{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"XT1NU3125AFD000XXX","brand":"ABB","brandSlug":"abb","productSlug":"XT1NU3125AFD000XXX","canonicalUrl":"https://aoctrl.com/abb/XT1NU3125AFD000XXX","factsUrl":"https://aoctrl.com/api/mcp/products/XT1NU3125AFD000XXX","rawCanonicalId":null},"summary":{"shortDescription":"ABB, XT1N series, molded case circuit breaker, XT1NU3125AFD000XXX, 3-pole, TMF 125-1250A trip unit, UL/CSA listed.","salesMarkdown":"The ABB XT1NU3125AFD000XXX is a 3-pole molded case circuit breaker (MCCB) from the XT1N 125 frame series, fitted with a TMF 125-1250A thermal-magnetic fixed trip unit. The description confirms UL and CSA listing, which governs acceptance in North American panelboards and switchgear. The TMF trip provides thermal overload protection (inverse-time) and magnetic short-circuit protection (instantaneous), sized for the 125-1250A range — meaning the trip unit is set for a specific ampere rating within that band, not field-adjustable across the full span. The XT1N 125 frame is a compact MCCB designed for 125 A maximum continuous current at 40 °C, though the TMF trip unit on this variant is specified for the 125-1250A range — the actual trip rating must be verified from the nameplate or factory setting, as the order code alone does not resolve the exact ampere trip. The 3-pole configuration suits three-phase circuits. UL 489 listing means it is certified for branch-circuit protection in North America; CSA C22.2 No. 5 covers the same for Canada.","metaTitle":"ABB XT1NU3125AFD000XXX XT1N 125 TMF 125-1250A 3P F F UL/CSA","metaDescription":"ABB XT1NU3125AFD000XXX molded case circuit breaker, XT1N 125 frame, TMF 125-1250A trip, 3-pole, UL/CSA. Current lifecycle stage. 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":{"lifecycle_stage":"current"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/XT1NU3125AFD000XXX/alternatives.json"},"ai":{"faq":[{"question":"What is the closest alternative to XT1NU3125AFD000XXX in the same family?","answer":"Within the XT1N 125 frame, the closest sibling would be a variant with a different trip unit type (e.g., TMD vs TMF) or a different ampere rating. The TMF trip is thermal-magnetic fixed; a TMD trip is also thermal-magnetic but with a different curve. The deciding factor is the specific trip rating and curve required by the load — no pin-compatible alternative exists without changing the trip unit."},{"question":"Where can I buy XT1NU3125AFD000XXX?","answer":"This part is sourced through independent industrial distribution and quoted to order against an RFQ. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm commitment."},{"question":"What compliance documentation does ABB provide for XT1NU3125AFD000XXX?","answer":"The listing confirms UL and CSA certification. ABB typically provides a Declaration of Conformity for CE marking, RoHS, and REACH compliance upon request through the supply channel. The specific documentation set should be requested at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/abb/XT1NU3125AFD000XXX","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/XT1NU3125AFD000XXX 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}}