{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY7263-6","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY7263-6","canonicalUrl":"https://aoctrl.com/siemens/5SY7263-6","factsUrl":"https://aoctrl.com/api/mcp/products/5SY7263-6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY7263-6, 2-pole miniature circuit breaker, 63 A, B-curve, 15 kA per EN 60898, 20 kA per IEC 60947-2, 36 mm wide.","salesMarkdown":"The Siemens SENTRON 5SY7263-6 is a 2-pole miniature circuit breaker rated 63 A at 35 °C with a B-curve trip characteristic — meaning it trips between 3 and 5 times rated current, suited for resistive and general-purpose loads where short inrush isn't expected. That's the number that governs coordination with the upstream protective device. The 63 A rating is at 35 °C ambient. At 40 °C it derates to 59.16 A, at 50 °C to 55.06 A, and at 60 °C to 50.65 A. That's the real continuous current the breaker will carry without nuisance tripping. Mounting position any — vertical, horizontal, upside-down, doesn't matter for the trip mechanism. The 76 mm depth is standard for the SENTRON 5SY series — no surprise when you're laying out the DIN rail.","metaTitle":"Siemens 5SY7263-6 SENTRON MCB, 63 A 2P B-Curve","metaDescription":"Siemens 5SY7263-6 SENTRON miniature circuit breaker, 63 A rated, 2-pole, B-curve, 15 kA (EN 60898) / 20 kA (IEC 60947-2). Current lifecycle stage. Quoted to order.","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","title":"5SY7263-6","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 400 V 15kA, 2-pole, B, 63A, D=70 mm","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":"63 A","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","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","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"2","Tripping Characteristic Class":"B","acc. to EN 60898 / rated value":"15 kA","Position / Of Power Supply Cord":"Any","acc. to IEC 60947-2 / rated value":"20 kA","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","at DC / acc. to IEC 60947-2 / rated value":"15 kA","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 (Operating Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/892d922090b2f17bcb2fe004de5faa9e.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=312663&mlfb=5SY7263-6"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SY7263-6?","answer":"15 kA per EN 60898 and 20 kA per IEC 60947-2. The higher IEC figure is the one to use for coordination studies under the standard that governs industrial panels."},{"question":"Will 5SY7263-6 drop into a panel specified for 5SY7210-7CC?","answer":"Both are 2-pole SENTRON MCBs on the same DIN-rail footprint, same 36 mm width, same depth. The difference is the rating — 63 A B-curve here versus the 10 A B-curve on the 5SY7210-7CC. If the panel bus and wiring are sized for 63 A, it fits without rewiring. If the panel was built for 10 A branch circuits, the 63 A breaker is oversized for the downstream conductors."},{"question":"Where can I buy 5SY7263-6 and how is it quoted?","answer":"Sourced and quoted to order against an RFQ through independent industrial distribution. Availability and current pricing are confirmed at quote time — no stock count or price is published here."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY7263-6","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/5SY7263-6 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}}