{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4663-8CV","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4663-8CV","canonicalUrl":"https://aoctrl.com/siemens/5SY4663-8CV","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4663-8CV","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 5SY4663-8CV, 4-pole MCB, tripping characteristic D, 63 A rated current, 15 kA breaking capacity at 400 V AC per IEC 60947-2, IP20 with conductors connected.","salesMarkdown":"Siemens 5SY4663-8CV is a 4-pole miniature circuit breaker (3+N, neutral switched) with D-curve tripping characteristic, rated 63 A at 35 °C ambient per IEC 60947-2. The D-curve (10–20× In magnetic trip) is sized for motor-starting inrush and high-inductive loads — a standard choice for conveyor drives, compressors, and pump panels where the instantaneous trip must ride through the start surge without nuisance opening. At 440 V AC (multi-phase operation) the same 15 kA holds — no derating at the higher voltage. Temperature derating is published: 59.54 A at 40 °C, 57.71 A at 45 °C, 55.8 A at 50 °C, 53.86 A at 55 °C. ## Mounting and integration — DIN-rail quick-assembly Occupies 4 modular-width units (72 mm width). Installation depth 70 mm; overall depth 76 mm with terminals. Rated for pollution degree 3 (conductive dust or humidity) and overvoltage category III (distribution level). Sealable cover option for panel lockout. ## Lifecycle and compliance — current production, full documentation Designed to IEC / EN 60947-2 (not the household EN 60898 standard), which means it is rated for industrial coordination and higher fault currents. Halogen-free and silicon-free construction. Vibration resistance per IEC 60068-2-6: ±1 mm at 5–25 Hz, 50 m/s² at 25–150 Hz.","metaTitle":"Siemens 5SY4663-8CV MCB, 4P D-curve 63 A, 15 kA IEC 60947-2","metaDescription":"Siemens 5SY4663-8CV 4-pole MCB, D-curve 63 A, 15 kA breaking capacity per IEC 60947-2. Current production. Quoted to order against RFQ.","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":"5SY4663-8CV","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Standard":"IEC / EN 60947-2","description":"MCB Icu=15KA 400V 3P+N D63","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"3+N","Number Of Poles":"4","lifecycle_stage":"current","Fastening Method":"Quick assembly system","Mounting Position":"any","Installation Depth":"70 mm","Degree Of Pollution":"3","at AC / rated value":"63 A","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","according to EN 61346-2":"F","at 35 °C / rated value":"63 A","at 40 °C / rated value":"59.54 A","at 45 °C / rated value":"57.71 A","at 50 °C / rated value":"55.8 A","at 55 °C / rated value":"53.86 A","Combined Terminal Bottom":"Yes","according to IEC 81346-2":"F","Suitability For Operation":"Mechanical engineering / industry","Neutral Conductor Switching":"Yes","Number Of Modular Width Units":"4","Tripping Characteristic Class":"D","Position / Of Power Supply Cord":"Any","Supply Voltage Frequency / Rated Value":"50/60 Hz","according to IEC 60947-2 / rated value":"15 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","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","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/abb689536ff07f9b10785ce8ff584b0b.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1531713&mlfb=5SY4663-8CV"},"ai":{"faq":[{"question":"What compliance documentation does Siemens provide for 5SY4663-8CV?","answer":"The breaker is designed to IEC / EN 60947-2, halogen-free and silicon-free. Vibration tested per IEC 60068-2-6. Standard Siemens declarations (CE, UKCA) accompany the product — specific RoHS/REACH declarations are available from Siemens' documentation portal."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4663-8CV","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/5SY4663-8CV 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}}