{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY6663-7CC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY6663-7CC","canonicalUrl":"https://aoctrl.com/siemens/5SY6663-7CC","factsUrl":"https://aoctrl.com/api/mcp/products/5SY6663-7CC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY6663-7CC miniature circuit breaker, 63 A, C characteristic, 4-pole (3P+N), 6 kA breaking capacity per EN 60898, 440 V AC.","salesMarkdown":"## 63 A C-curve MCB for panel and machine protection The Siemens 5SY6663-7CC is a SENTRON miniature circuit breaker rated 63 A with a C tripping characteristic, 4-pole (3P+N) design, and a 6 kA breaking capacity per EN 60898 at 440 V AC. The 3P+N configuration switches all three phases and the neutral, with the neutral pole switching but not protected against overcurrent; that's standard for TN and TT systems where neutral overcurrent protection is handled upstream or by the phase poles. ## Thermal derating and ambient conditions Rated 63 A at 35 °C ambient, the 5SY6663-7CC derates to 60.04 A at 40 °C, 58.46 A at 45 °C, 56.89 A at 50 °C, and 55.25 A at 55 °C. If your panel internal ambient runs above 35 °C — common in crowded enclosures — size the upstream protection and load accordingly. Mounting position any — vertical, horizontal, upside-down — no derating needed for orientation.","metaTitle":"Siemens 5SY6663-7CC SENTRON MCB, 63A C-Curve 4P 6kA","metaDescription":"Siemens 5SY6663-7CC SENTRON miniature circuit breaker, 63 A rated, C characteristic, 4-pole (3P+N), 6 kA per EN 60898, 440 V AC. Current production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["4-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"72 mm","title":"5SY6663-7CC","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 400 V 6kA, 3+N-pole, C, 63A","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"3P+N","Number Of Poles":"4","lifecycle_stage":"current","Fastening Method":"Quick assembly system","Mounting Position":"any","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"3","Product Designation":"Miniature circuit breaker","at AC / rated value":"63 A","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","Energy Limitation Class":"3","according to EN 61346-2":"F","at 35 °C / rated value":"63 A","at 40 °C / rated value":"60.04 A","at 45 °C / rated value":"58.46 A","at 50 °C / rated value":"56.89 A","at 55 °C / rated value":"55.25 A","Combined Terminal Bottom":"Yes","according to IEC 81346-2":"F","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"4","Tripping Characteristic Class":"C","Position / Of Power Supply Cord":"Any","Product Feature / Touch Protection":"Yes","according to EN 60898 / rated value":"6 kA","Influence Of The Surrounding Temperature":"max. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C","Type Of Voltage / Of The Operating Voltage":"AC","Product Component / Neutral Conductor Switching":"Yes","with multi-phase operation / at AC / rated value":"440 V","operating voltage / at DC / rated value / maximum":"72 V","vibration resistance / according to IEC 60068-2-6":"±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz","with single-phase operation / at AC / rated value":"440 V","Mechanical Service Life (Switching Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/597fca0d3603f115d674d0d74768edc8.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=297411&mlfb=5SY6663-7CC"},"ai":{"faq":[{"question":"Where can I buy 5SY6663-7CC and how do I get a price?","answer":"Sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time."},{"question":"What is 5SY6663-7CC's listed depth (76 mm) on this component line?","answer":"The depth is 76 mm, with an installation depth of 70 mm."},{"question":"What is 5SY6663-7CC's listed width (72 mm) on this component line?","answer":"The width is 72 mm, which corresponds to 4 modular width units on a DIN rail."},{"question":"Will 5SY6663-7CC drop into a panel that was specified around 5SY7210-7CC without rewiring?","answer":"Both are 4-pole SENTRON MCBs with the same 72 mm width and DIN-rail mounting, so the mechanical fit is identical. However, the 5SY7210-7CC is a different rating and characteristic — verify the load current and tripping curve before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY6663-7CC","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/5SY6663-7CC 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}}