{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4550-8CC11","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4550-8CC11","canonicalUrl":"https://aoctrl.com/siemens/5SY4550-8CC11","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4550-8CC11","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 5SY4550-8CC11 miniature circuit breaker, 230 V, 10 kA, 1+N-pole, D-curve, 50 A, for railway applications.","salesMarkdown":"The Siemens 5SY4550-8CC11 is a miniature circuit breaker (MCB) rated 230 V with a 10 kA breaking capacity, configured as 1+N-pole, D-curve, 50 A, and specified for railway applications. ## Deployment context The D-curve and 10 kA SCCR suit it for branch-circuit protection in 230 V single-phase auxiliary supplies — HVAC, lighting, battery chargers, or door controls — where the prospective fault current at the panel is known to stay under 10 kA.","metaTitle":"Siemens 5SY4550-8CC11 MCB, 230V 10kA, 1+N, D, 50A, Railway","metaDescription":"Siemens 5SY4550-8CC11 miniature circuit breaker, 230V 10kA, 1+N-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/081baebf2726ed6fc704b3107c5a80e3.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=496979&mlfb=5SY4550-8CC11","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY4550-8CC11/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 5SY4550-8CC11 and get a price?","answer":"This part 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 commercial response."},{"question":"What is the D-curve rating on this MCB?","answer":"The D-curve magnetic trip operates at 10–20× rated current (500–1000 A instantaneous), suited for loads with high inrush such as transformers and motor drives in railway auxiliary circuits."},{"question":"What compliance documentation does Siemens provide for 5SY4550-8CC11?","answer":"The manufacturer typically supplies a declaration of conformity to EN 60898-1 and EN 50155 (railway rolling stock) for this series, along with RoHS and REACH compliance statements. Specific documentation is available on request at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4550-8CC11","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/5SY4550-8CC11 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}}