{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4450-8CC11","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4450-8CC11","canonicalUrl":"https://aoctrl.com/siemens/5SY4450-8CC11","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4450-8CC11","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 5SY4450-8CC11, miniature circuit breaker, 400 V, 10 kA, 4-pole, D characteristic, 50 A, railway applications.","salesMarkdown":"## Integration notes for the panel builder The 4-pole form factor (3 poles + switched neutral) occupies four DIN-rail module widths in a standard 35 mm enclosure — account for the fill factor when laying out a rail with adjacent breakers or auxiliaries. Rated for 400 V line-to-line, so it suits both 230/400 V three-phase rail auxiliary networks and single-phase 230 V branch circuits when the neutral pole is used as the switched pole.","metaTitle":"Siemens 5SY4450-8CC11 MCB, 400V 10kA, 4P D 50A, Railway","metaDescription":"Siemens 5SY4450-8CC11 miniature circuit breaker, 400V 10kA, 4-pole, D-curve, 50A, for railway applications. Current lifecycle stage. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"lifecycle_stage":"current"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/65bb8df97af2626c5c5f6eba75bf4764.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=321637&mlfb=5SY4450-8CC11","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY4450-8CC11/alternatives.json"},"ai":{"faq":[{"question":"What is the 5SY4450-8CC11 used for?","answer":"It is a miniature circuit breaker rated 400 V, 10 kA, 4-pole, D-curve, 50 A, specified for railway applications — suitable for protecting auxiliary circuits in rolling stock and trackside distribution."},{"question":"How do I get current pricing and availability for 5SY4450-8CC11?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4450-8CC11","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/siemens/5SY4450-8CC11 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}}