{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4263-6CC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4263-6CC","canonicalUrl":"https://aoctrl.com/siemens/5SY4263-6CC","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4263-6CC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY4263-6CC, 2-pole miniature circuit breaker, B characteristic, 63 A rated current, 10 kA breaking capacity at 400 V AC, 50/60 Hz.","salesMarkdown":"## What this 63 A B-curve MCB does for the panel The Siemens SENTRON 5SY4263-6CC is a 2-pole miniature circuit breaker rated 63 A at 400 V AC, 50/60 Hz, with a B tripping characteristic and a 10 kA breaking capacity per EN 60898. The 10 kA rating under EN 60898 is the primary interrupting capacity for IEC-distribution panels. For UL 1077 / CSA C22.2 No. 235 recognition, the same unit carries a 5 kA rating — a lower figure that matters when the panel is specified under North American supplementary-protector rules. In a mixed-standard panel, the lower of the two ratings governs the coordination study. ## Physical fit and mounting IP20 with connected conductors — suitable for enclosed panels, not for wet-area standalone mounting. ## Environmental range and derating Operates from -40 °C to 75 °C ambient, with humidity derating above 55 °C: max 95% RH at 55 °C, dropping to 35% at 75 °C. Vibration resistance per IEC 60068-2-6: ±1 mm at 5–25 Hz, 50 m/s² at 25–150 Hz.","metaTitle":"Siemens 5SY4263-6CC SENTRON MCB, 2P B-Char 63A 10kA","metaDescription":"Siemens SENTRON 5SY4263-6CC miniature circuit breaker, 2-pole, B-curve, 63 A, 10 kA per EN 60898, 400 V AC. Current production. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["2-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"36 mm","title":"5SY4263-6CC","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 400 V 10kA, 2-pole, B, 63A","Halogen-Free":"Yes","Silicon-Free":"Yes","Number Of Poles":"2","Type Of Voltage":"AC","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":"400 V","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","Number Of Poles / Note":"2P","acc. to DIN EN 61346-2":"F","Energy Limitation Class":"3","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"2","Tripping Characteristic Class":"B","acc. to EN 60898 / rated value":"10 kA","Position / Of Power Supply Cord":"Any","Product Feature / Touch Protection":"Yes","Supply Voltage Frequency / Rated Value":"50/60 Hz","Influence Of The Surrounding Temperature":"max. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C","operational current / at AC / rated value":"63 A","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 Function / Neutral Conductor Switching":"No","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/bf1bb25e50c72f2c4581958d3c4b2404.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=49531&mlfb=5SY4263-6CC"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SY4263-6CC?","answer":"10 kA per EN 60898 at 400 V AC, and 5 kA per UL 1077 / CSA C22.2 No. 235."},{"question":"Where can I buy 5SY4263-6CC?","answer":"Sourced and quoted to order against an RFQ through independent distribution channels; availability and current pricing confirmed at quote time."},{"question":"What are the physical dimensions of 5SY4263-6CC?","answer":"Width 36 mm (2 modular units), depth 76 mm, height 90 mm, installation depth 70 mm."},{"question":"What compliance documentation does Siemens provide for 5SY4263-6CC?","answer":"The product is halogen-free and silicon-free, and carries IEC 60898 and UL 1077 / CSA C22.2 No. 235 ratings. Full RoHS and REACH declarations are standard with the SENTRON series documentation."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4263-6CC","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/5SY4263-6CC 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}}