{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"S801U-K50","brand":"ABB","brandSlug":"abb","productSlug":"S801U-K50","canonicalUrl":"https://aoctrl.com/abb/S801U-K50","factsUrl":"https://aoctrl.com/api/mcp/products/S801U-K50","rawCanonicalId":null},"summary":{"shortDescription":"ABB S801U-K50, S800 series, 1-pole miniature circuit breaker, Trip Curve K, 50 A, 240 VAC, 25 kA interrupting rating, DIN rail mount.","salesMarkdown":"At 50 A and 240 VAC, this breaker handles motor and transformer loads where the inrush current is higher than a resistive load — the K curve trips between 8 and 12 times the rated current, so it won't nuisance-trip on a motor start but still clears a hard fault. ## DIN-rail integration Single-pole width leaves room for adjacent breakers or accessories in the same row. No special tooling needed for the swap.","metaTitle":"ABB S801U-K50 MCB 1P K 50A 25kA DIN Rail","metaDescription":"ABB S801U-K50 MCB, 1-pole, Trip Curve K, 50 A, 240 VAC, 25 kA interrupting rating. DIN rail mount. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Amps":"50","Type":"Trip Curve K","Poles":"1","title":"S801U-K50","Mounting":"DIN Rail","Volts AC":"240","description":"Abb S801u-k50 Mcb S800 1p K 50a|ABB S801U-K50","lifecycle_stage":"current","Interrupt Rating AC":"25 kA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/cb3d4bfbdc60fa7ffdf665a432c0be80.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy the S801U-K50 and how is it quoted?","answer":"Sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock or price figures are published here."},{"question":"What is the closest functional alternative to the S801U-K50?","answer":"The ABB S201MUC-K2 is a 1-pole K-curve MCB but rated at only 2 A with a 6 kA interrupting rating at 277 VAC. It will not replace the 50 A, 25 kA S801U-K50 without a complete redesign of the branch circuit."},{"question":"What is the listed amps and type for the S801U-K50?","answer":"50 A, Trip Curve K, 1-pole, 240 VAC, 25 kA interrupting rating."},{"question":"Will the S801U-K50 drop into a panel that was specified around the S201MUC-K2?","answer":"No. The S201MUC-K2 is a 2 A, 6 kA breaker; the S801U-K50 is 50 A, 25 kA. The physical footprint is similar (1-pole DIN rail), but the ampacity and fault rating differences mean the panel's bus bars, wire sizing, and upstream protection would need re-evaluation."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/abb/S801U-K50","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/S801U-K50 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}}