{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY7663-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY7663-8","canonicalUrl":"https://aoctrl.com/siemens/5SY7663-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SY7663-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY7663-8 miniature circuit breaker, D characteristic, 63 A rated, 4-pole (3P+N), 15 kA breaking capacity per IEC/EN 60898, 4 MW units, IP20.","salesMarkdown":"At 40 °C ambient the continuous rating derates to 59.98 A, at 50 °C to 56.83 A, and at 60 °C to 53.42 A — so if your panel runs hot, you need to account for that in the load calculation, not just the 35 °C nameplate number. Sealable and touch-protected per the spec, so it meets the requirements for lockout/tagout in industrial panels without an extra enclosure. ## D-curve selectivity and coordination notes With a D characteristic and 15 kA rated short-circuit capacity, this breaker coordinates well downstream of a larger SENTRON molded-case or air circuit breaker in a selective scheme. ## Environmental and compliance specs for documentation Operating temperature range is -40 °C to +75 °C, with humidity influence capped at 95% up to 55 °C, then derated to 35% at 75 °C. IP20 with connected conductors; once wired, the terminals are finger-safe. The product designation per IEC 81346-2 and DIN EN 61346-2 is F (protective device).","metaTitle":"Siemens 5SY7663-8 SENTRON MCB, D Curve, 63A 4P 15kA","metaDescription":"Siemens 5SY7663-8 SENTRON miniature circuit breaker, 63A rated, D tripping characteristic, 4-pole (3P+N), 15kA breaking capacity per IEC/EN 60898. Current production. Quoted to ord","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","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","acc. to IEC 81346-2":"F","at AC / rated value":"63 A","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","acc. to DIN EN 61346-2":"F","at 35 °C / rated value":"63 A","at 40 °C / rated value":"59.98 A","at 45 °C / rated value":"58.4 A","at 50 °C / rated value":"56.83 A","at 55 °C / rated value":"55.12 A","at 60 °C / rated value":"53.42 A","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"4","Tripping Characteristic Class":"D","acc. to EN 60898 / rated value":"15 kA","Position / Of Power Supply Cord":"Any","acc. to IEC 60947-2 / rated value":"15 kA","Product Feature / Touch Protection":"Yes","Influence Of The Surrounding Temperature":"max. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C","at DC / acc. to IEC 60947-2 / rated value":"15 kA","Type Of Voltage / Of The Operating Voltage":"AC","at AC / acc. to UL 1077 and CSA C22.2 No.235":"5 kA","vibration resistance / acc. to IEC 60068-2-6":"±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz","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","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,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/ae6dde1029321121cc76a14f28ae6222.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=384430&mlfb=5SY7663-8","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY7663-8/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY7663-8","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/5SY7663-8 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}}