{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY5263-6","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY5263-6","canonicalUrl":"https://aoctrl.com/siemens/5SY5263-6","factsUrl":"https://aoctrl.com/api/mcp/products/5SY5263-6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY5263-6, miniature circuit breaker, 2-pole, 63 A, B characteristic, 10 kA breaking capacity per IEC/EN 60898-2 and UL1077, 440 V DC rated, IP20.","salesMarkdown":"## Siemens 5SY5263-6 — 63 A B-curve MCB for panel and load protection The Siemens 5SY5263-6 is a 2-pole miniature circuit breaker from the SENTRON family, rated 63 A at 35 °C with a B tripping characteristic and a 10 kA breaking capacity per IEC/EN 60898-2 and UL1077. It also carries a 10 kA DC rating per EN 60898-2 at 440 V DC, making it suitable for universal-current applications where AC or DC loads need overcurrent protection in a single device. At 63 A, this breaker handles main feeder or large branch circuits in distribution boards. The 440 V DC rating (10 kA) covers DC bus or battery-backed circuits, though polarity must be observed on the supply side. Thermal derating is published: 63 A at 35 °C, 59.16 A at 40 °C, 57.14 A at 45 °C, 55.06 A at 50 °C, 52.92 A at 55 °C, and 50.65 A at 60 °C. Mounting position is unrestricted — vertical, horizontal, or inverted. The breaker is sealable for anti-tamper requirements. Halogen-free and silicon-free construction supports use in clean environments or where outgassing must be minimized.","metaTitle":"Siemens 5SY5263-6 SENTRON MCB, 63 A, 2-Pole, B Curve, 10 kA","metaDescription":"Siemens 5SY5263-6 SENTRON miniature circuit breaker, 63 A, 2-pole, B tripping characteristic, 10 kA breaking capacity per IEC/EN 60898-2 and UL1077. Active production, sourced to o","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["2-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"36 mm","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Standard":"IEC / EN 60898-2, UL1077","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"2P","Number Of Poles":"2","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","at AC / rated value":"63 A","at DC / rated value":"440 V","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","Energy Limitation Class":"3","according to EN 61346-2":"F","at 35 °C / rated value":"63 A","at 40 °C / rated value":"59.16 A","at 45 °C / rated value":"57.14 A","at 50 °C / rated value":"55.06 A","at 55 °C / rated value":"52.92 A","at 60 °C / rated value":"50.65 A","Combined Terminal Bottom":"Yes","according to IEC 81346-2":"F","Suitability For Operation":"universal current","Neutral Conductor Switching":"No","Number Of Modular Width Units":"2","Tripping Characteristic Class":"B","Position / Of Power Supply Cord":"AC as required, observe DC polarity","at DC / according to EN 60898-2":"10 kA","according to EN 60898 / rated value":"10 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/DC","Value Range / Of The Supply Voltage Frequency":"50/60 Hz","at DC / according to IEC 60947-2 / rated value":"15 kA","with multi-phase operation / at AC / rated value":"440 V","operating voltage / at DC / rated value / maximum":"500 V","vibration resistance / according to IEC 60068-2-6":"±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz","with single-phase operation / at AC / rated value":"440 V","Mechanical Service Life (Switching Cycles) / Typical":"5 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/bca33c038f20822cdbedcd267f6f00a8.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=194453&mlfb=5SY5263-6","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY5263-6/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 5SY5263-6 and how do I get a price?","answer":"The part is sourced to order against an RFQ through independent distribution. Submit an RFQ for current pricing and availability — confirmed at quote time."},{"question":"Will 5SY5263-6 drop into a panel specified around 5SY5250-7 without rewiring?","answer":"Yes — both are 2-pole SENTRON 5SY breakers on the same DIN-rail footprint (36 mm width, 2 modular units). The 5SY5263-6 is the 63 A B-curve variant; the 5SY5250-7 is a 50 A B-curve. No rewiring needed if the panel was designed for the 50 A version, provided the circuit is rated for 63 A."},{"question":"What compliance documentation does Siemens provide for 5SY5263-6?","answer":"The breaker is certified to IEC/EN 60898-2 and UL1077. It is halogen-free and silicon-free, supporting RoHS/REACH compliance. Standard documentation includes the declaration of conformity and the datasheet."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY5263-6","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/5SY5263-6 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}}