{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"S803U-K50","brand":"ABB","brandSlug":"abb","productSlug":"S803U-K50","canonicalUrl":"https://aoctrl.com/abb/S803U-K50","factsUrl":"https://aoctrl.com/api/mcp/products/S803U-K50","rawCanonicalId":null},"summary":{"shortDescription":"ABB S803U-K50, miniature circuit breaker, 50A, 3-pole, K trip curve, 240 VAC, DIN rail mount, 0.91 kg.","salesMarkdown":"The ABB S803U-K50 is a 3-pole miniature circuit breaker rated 50 A with a K trip curve, for 240 VAC applications. It mounts on a standard DIN rail, making it a direct fit for panel builds or retrofits where the existing breaker footprint is already DIN-rail based. The K curve means the magnetic trip threshold is higher than a B or C curve — typically 8 to 12 times rated current — so it tolerates the inrush of motor loads or transformer primaries without nuisance tripping, while still providing short-circuit protection.","metaTitle":"S803U-K50 ABB Miniature Circuit Breaker, 50A, 3P, K Trip","metaDescription":"ABB S803U-K50 miniature circuit breaker, 50A, 3-pole, K trip curve, 240 VAC, DIN rail mount. Current production. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"title":"S803U-K50","Part #":"S803U-K50","Weight":"0.91 kgs","Category":"Circuit Breakers","description":"Circuit Breaker, Miniature, DIN Rail Mount, 50A, 3P, 240VAC|Circuit Breaker, Miniature, DIN Rail Mount, 50 Amp, 3 Pole, 240 Volt AC, K Trip","Sub Category":"Molded Case Circuit Breakers","Top Category":"Circuit Breakers, Fuses & Protection","lifecycle_stage":"current"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$316.50","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/4373d32b9fd26d9c0b0c2e91ab7cda82.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy S803U-K50 and how do I get a price?","answer":"The S803U-K50 is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/abb/S803U-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/S803U-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}}