{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4663-7CV","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4663-7CV","canonicalUrl":"https://aoctrl.com/siemens/5SY4663-7CV","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4663-7CV","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 5SY4663-7CV, MCB, Icu=15kA 400V 3P+N C63.","salesMarkdown":"The Siemens 5SY4663-7CV is a 3-pole-plus-neutral miniature circuit breaker with a C63 tripping curve and a rated short-circuit breaking capacity of 15 kA at 400 V AC. That 15 kA Icu at 400 V means it can safely interrupt a fault current up to 15,000 amps without welding its contacts or failing catastrophically — the kind of rating you need for a sub-distribution board fed by a transformer with significant fault current available. The 3P+N configuration with a C63 rating fits a three-phase, four-wire system (TN-S or TN-C-S) where the neutral is switched alongside the phases — common in European-style distribution boards where you want full isolation on all poles. The 15 kA breaking capacity at 400 V gives you selectivity headroom downstream of a larger feeder breaker; you can size the upstream device for 25 kA or higher and still have this MCB coordinate properly for a fault on its branch. Mounts on standard DIN rail in a 4-module width (72 mm at 18 mm per pole), so it drops into any existing Siemens 5SY series distribution board or enclosure without a footprint change.","metaTitle":"Siemens 5SY4663-7CV MCB, 15kA 400V 3P+N C63","metaDescription":"Siemens 5SY4663-7CV miniature circuit breaker, 15kA breaking capacity at 400V, 3-pole + N, C63 curve. Current lifecycle stage. Available to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"title":"5SY4663-7CV","description":"MCB Icu=15KA 400V 3P+N C63","lifecycle_stage":"current"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/d89c57c6c984f9f3e195da43bd364f54.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1531712&mlfb=5SY4663-7CV"},"ai":{"faq":[{"question":"What is the breaking capacity of the 5SY4663-7CV?","answer":"The rated short-circuit breaking capacity (Icu) is 15 kA at 400 V AC, 3-pole + neutral, with a C63 tripping curve."},{"question":"Where can I buy the 5SY4663-7CV?","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":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4663-7CV","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/5SY4663-7CV 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}}