{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY8663-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY8663-7","canonicalUrl":"https://aoctrl.com/siemens/5SY8663-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SY8663-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY8663-7 miniature circuit breaker, 3P+N, 25 kA at 400 V AC per IEC 60947-2, C-curve, 4-module width.","salesMarkdown":"## Integration note — 5SY8663-7 The Siemens SENTRON 5SY8663-7 is a 4-pole (3P+N) miniature circuit breaker in the C-curve characteristic, rated 25 kA at 400 V AC per IEC 60947-2. That breaking capacity covers most industrial panel secondary-fault scenarios without cascading upstream — the 25 kA figure is the interrupting rating at the service entrance, not a derated branch value. Mounts in any position — no derating for upside-down or horizontal orientation. The quick-assembly fastening method means it snaps onto the rail without tools and releases via a screwdriver slot. Dual-rated under IEC/EN 60947-2 (25 kA at 400 V AC) and UL 1077 / CSA C22.2 No. 235 (5 kA at 400 V AC). The UL 1077 rating is for supplementary protection, not branch-circuit primary — a common distinction that matters when the panel must pass a UL 508A SCCR calculation. Overvoltage category III, suitable for fixed-installation distribution boards.","metaTitle":"Siemens SENTRON 5SY8663-7 MCB, 3P+N, 25kA, C-Curve","metaDescription":"Siemens SENTRON 5SY8663-7 miniature circuit breaker, 3P+N, 25kA at 400V AC per IEC 60947-2, C-curve, active production, sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Depth":"76 mm","Width":"72 mm","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Standard":"IEC / EN 60947-2 / UL1077","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","at AC rated value":"400 V","at DC rated value":"60 V","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"3","Product Designation":"Miniature circuit breaker","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Neutral Conductor Switching":"Yes","Number Of Modular Width Units":"4","Position Of Power Supply Cord":"Any","Tripping Characteristic Class":"C","according to IEC 60947-2 rated value":"25 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","at DC according to IEC 60947-2 rated value":"15 kA","Value Range Of The Supply Voltage Frequency":"50/60 Hz","operating voltage at DC rated value maximum":"72 V","with multi-phase operation at AC rated value":"440 V","with single-phase operation at AC rated value":"440 V","at AC according to UL 1077 and CSA C22.2 No.235":"5 kA","vibration resistance according to IEC 60068-2-6":"±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz","Mechanical Service Life (Operating Cycles) Typical":"10 000","Product Extension Installable Supplementary Devices":"Yes","supply voltage with single-phase operation at AC rated value":"230 V","power loss [W] for rated value of the current at AC in hot operating state per pole":"6 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/1c586160876ced843404081584857cc2.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=63953&mlfb=5SY8663-7","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY8663-7/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 5SY8663-7 and get a price?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Submit an RFQ for current pricing and availability — no stock count or lead-time figure published here."},{"question":"What breaking capacity does 5SY8663-7 have at 400V AC?","answer":"25 kA at 400 V AC per IEC 60947-2, and 5 kA at 400 V AC per UL 1077 / CSA C22.2 No. 235."},{"question":"What compliance documentation does Siemens provide for 5SY8663-7?","answer":"The breaker carries IEC/EN 60947-2 and UL 1077 / CSA C22.2 No. 235 certifications. Halogen-free and silicon-free construction is declared."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY8663-7","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/5SY8663-7 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}}