{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL4263-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL4263-8","canonicalUrl":"https://aoctrl.com/siemens/5SL4263-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SL4263-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SL miniature circuit breaker, 2-pole, D-curve, 63 A, 10 kA breaking capacity, 400 V AC, IP20.","salesMarkdown":"The Siemens 5SL4263-8 is a 2-pole miniature circuit breaker from the SENTRON 5SL series, rated 63 A at 400 V AC with a D tripping characteristic. The D-curve trips magnetically between 10× and 20× In (630 A to 1260 A), so it's a deliberate choice for circuits with starting surges — a motor starting direct-on-line or a bank of discharge lamps. At 30 °C the breaker carries the full 63 A; at 40 °C it derates to 59.67 A, and at 55 °C to 54.29 A — you'll need to account for enclosure heat rise if the panel runs warm. ## Integration notes Sealable with a lead or tag to prevent unauthorized switching.","metaTitle":"Siemens 5SL4263-8 SENTRON MCB, 2P, D-63 A, 10 kA, 400 V AC","metaDescription":"Siemens 5SL4263-8 SENTRON miniature circuit breaker, 2-pole, D-curve, 63 A, 10 kA breaking capacity per EN 60898. Quoted to order against RFQ.","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","Halogen-Free":"Yes","Silicon-Free":"Yes","Number Of Poles":"2","Type Of Voltage":"AC","lifecycle_stage":"current","Mounting Position":"any","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"2","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","Design Of The Product":"5SL miniature circuit breakers","Number Of Poles / Note":"2P","acc. to DIN EN 61346-2":"F","Energy Limitation Class":"3","at 30 °C / rated value":"63 A","at 40 °C / rated value":"59.67 A","at 45 °C / rated value":"57.96 A","at 55 °C / rated value":"54.29 A","Suitability For Operation":"Residential buildings/infrastructure","Number Of Modular Width Units":"2","Tripping Characteristic Class":"D","at DC / rated value / maximum":"72 V","acc. to EN 60898 / rated value":"10 kA","acc. to IEC 60947-2 / rated value":"10 kA","Product Feature / Touch Protection":"Yes","supply voltage / at AC / rated value":"400 V","Influence Of The Surrounding Temperature":"+55 °C, max. 95% humidity","with multi-phase operation / at AC / maximum":"440 V","Product Function / Neutral Conductor Switching":"No","with multi-phase operation / at AC / rated value":"440 V","Mechanical Service Life (Switching Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/69e2b11521f3800911eef4d09f2a0d3b.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=416293&mlfb=5SL4263-8","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SL4263-8/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy the 5SL4263-8 and get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is the breaking capacity of the 5SL4263-8?","answer":"10 kA per EN 60898 and IEC 60947-2 at 400 V AC."},{"question":"What compliance documentation is available for the 5SL4263-8?","answer":"The breaker carries CE marking per the low-voltage directive; RoHS and REACH compliance is standard for Siemens SENTRON products. Specific declarations can be provided with the order documentation."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL4263-8","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/5SL4263-8 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}}