{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4503-8CV","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4503-8CV","canonicalUrl":"https://aoctrl.com/siemens/5SY4503-8CV","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4503-8CV","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 5SY4503-8CV, MCB, D3 curve, 1P+N, Icu=15kA 230/400V.","salesMarkdown":"The Siemens 5SY4503-8CV is a miniature circuit breaker (MCB) with a D tripping characteristic, rated for 3 A, single-pole plus neutral (1P+N), and a rated ultimate short-circuit breaking capacity (Icu) of 15 kA at both 230 V and 400 V. The 1P+N configuration switches the line conductor and provides switched neutral isolation, common in single-phase final subcircuits across European-style distribution boards. For a 3 A D-curve MCB, that's a generous breaking capacity; it gives headroom over typical domestic or light-commercial prospective fault levels.","metaTitle":"5SY4503-8CV Siemens MCB D3 1P+N 15kA Icu","metaDescription":"Siemens 5SY4503-8CV MCB, D3 curve, 1P+N, 15kA Icu at 230/400V. Current lifecycle stage. Quoted to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"lifecycle_stage":"current"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/8449d5a1d8c662fb455d7a352b11b647.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1531647&mlfb=5SY4503-8CV","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY4503-8CV/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of the 5SY4503-8CV?","answer":"The 5SY4503-8CV has a rated ultimate short-circuit breaking capacity (Icu) of 15 kA at both 230 V and 400 V."},{"question":"Where can I buy the 5SY4503-8CV?","answer":"The 5SY4503-8CV is sourced and quoted to order against an RFQ through independent distribution, with availability and current pricing confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4503-8CV","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/5SY4503-8CV 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}}