{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"S802U-K50","brand":"ABB","brandSlug":"abb","productSlug":"S802U-K50","canonicalUrl":"https://aoctrl.com/abb/S802U-K50","factsUrl":"https://aoctrl.com/api/mcp/products/S802U-K50","rawCanonicalId":null},"summary":{"shortDescription":"ABB S800 series, S802U-K50, 2-pole MCB, Trip Curve K, 50 A, 240 VAC, 25 kA interrupting rating, DIN rail mount.","salesMarkdown":"The 25 kA interrupting rating at 240 VAC means this breaker can safely clear a fault current up to 25,000 amps without welding its contacts or causing an arc flash — critical for high-fault-capacity panels where standard 10 kA breakers would fail. ## Trip Curve K — what it means for the panel Trip Curve K is the middle ground between B and C curves: it holds through 8–12× rated current before instant tripping. That makes it a good fit for motor-starting loads, transformers, and solenoid valves where the inrush spike would nuisance-trip a B-curve breaker but doesn't need the heavy delay of a D curve. At 50 A, this breaker handles a 15–20 kW motor on a 240 V single-phase line, or a group of smaller inductive loads in a control panel. The 2-pole configuration lets it switch both line and neutral on a single-phase circuit.","metaTitle":"ABB S802U-K50 MCB 2P K 50A, 25 kA","metaDescription":"ABB S802U-K50 S800 series MCB, 2-pole, Trip Curve K, 50 A, 240 VAC, 25 kA interrupting rating. DIN rail mount. Current lifecycle. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["2-Pole MCB (DIN Rail)"],"specifications":{"Amps":"50","Type":"Trip Curve K","Poles":"2","title":"S802U-K50","Mounting":"DIN Rail","Volts AC":"240","description":"ABB S802U-K50 MCB S800 2P K 50A|ABBS802UK50","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/6ffb4695ff09f588d4cca825f82e4b79.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the interrupting rating of S802U-K50?","answer":"25 kA at 240 VAC — sufficient for high-fault panels where standard 10 kA breakers would not coordinate."},{"question":"Where can I buy S802U-K50 and get current pricing?","answer":"Sourced to order through independent distribution. Submit an RFQ for current pricing and availability — confirmed at quote time."},{"question":"What is Trip Curve K used for?","answer":"Trip Curve K (8–12× In) is designed for inductive loads like motors, transformers, and solenoids where inrush current is higher than resistive loads but doesn't need the full delay of a D curve."},{"question":"Will S802U-K50 drop into a panel specified for S202M-B10?","answer":"No — the S202M-B10 is a 10 A B-curve breaker with a 6 kA interrupting rating. The S802U-K50 is a 50 A K-curve breaker with 25 kA interrupting capacity. They are not drop-in replacements; the panel's fault current rating and load current must be re-evaluated."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/abb/S802U-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/S802U-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}}