{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4663-5","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4663-5","canonicalUrl":"https://aoctrl.com/siemens/5SY4663-5","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4663-5","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY4663-5, miniature circuit breaker, 4-pole (3P+N), 63 A rated at 35 °C, tripping characteristic A, 10 kA per EN 60898, 15 kA per IEC 60947-2.","salesMarkdown":"The Siemens 5SY4663-5 is a SENTRON miniature circuit breaker with a 4-pole 3P+N design, rated 63 A at 35 °C. The tripping characteristic A means it reacts to very short overcurrents — typically used for semiconductor protection or long cable runs where you need fast clearing on small overloads, not motor starting. For DC circuits, it's rated 15 kA per IEC 60947-2 as well. ## Derating and ambient conditions — the real-world current The 63 A rating holds at 35 °C. Above that, the breaker derates: 59.98 A at 40 °C, 58.4 A at 45 °C, 56.83 A at 50 °C, 55.12 A at 55 °C, and 53.42 A at 60 °C. If your enclosure runs hot — say 50 °C internal ambient — you're effectively working with a 56.83 A device, not 63 A. The operating temperature range is -40 °C to 75 °C, with humidity limits: max 95% up to 55 °C, then dropping to 35% at 75 °C. Overvoltage category III suits fixed installations like distribution boards. The combined terminal design (top and bottom) accepts conductors without needing separate busbar adapters for most panel layouts. Touch protection is built in. Sealable, halogen-free, silicon-free — relevant for environments where outgassing or contamination matters (clean rooms, food processing).","metaTitle":"Siemens 5SY4663-5 SENTRON MCB, 63 A, 10 kA, Char A, 4P","metaDescription":"Siemens 5SY4663-5 SENTRON miniature circuit breaker, 63 A rated at 35 °C, 10 kA (EN 60898) / 15 kA (IEC 60947-2), characteristic A, 4-pole 3P+N. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["4-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"72 mm","title":"5SY4663-5","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 400 V 10kA, 3+N-pole, A, 63 A, D=70 mm","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":"A","acc. to EN 60898 / rated value":"10 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,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/919f800c911f62dda1eb0943c4017a57.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=239072&mlfb=5SY4663-5"},"ai":{"faq":[{"question":"What does tripping characteristic A mean on this MCB?","answer":"Characteristic A trips on very short overcurrents — typically used for semiconductor protection or long cable runs where fast clearing on small overloads is needed, not for motor starting (which uses C or D curves)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4663-5","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/5SY4663-5 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}}