{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SJ4263-8HG41","brand":"Siemens","brandSlug":"siemens","productSlug":"5SJ4263-8HG41","canonicalUrl":"https://aoctrl.com/siemens/5SJ4263-8HG41","factsUrl":"https://aoctrl.com/api/mcp/products/5SJ4263-8HG41","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SJ4 series, 2-pole miniature circuit breaker, D tripping characteristic, 63 A rated current, 36 mm width, DIN rail mount.","salesMarkdown":"## What this 63 A D-curve MCB is for The Siemens SENTRON 5SJ4263-8HG41 is a 2-pole miniature circuit breaker with a D tripping characteristic, rated 63 A at both 30 °C and 40 °C ambient. ## Thermal derating and real-world loading The 63 A rating holds up to 40 °C ambient. Above that, the breaker derates linearly: 61.7 A at 45 °C, 60.4 A at 50 °C, 59.1 A at 55 °C, and 58 A at 60 °C. The breaker itself survives up to 75 °C ambient and down to -40 °C, but the continuous current capability shrinks above 40 °C. Halogen-free and silicon-free construction — important for sensitive environments like clean rooms or semiconductor fabs where outgassing can contaminate processes. IP20 with connected conductors; IP40 in the handle range.","metaTitle":"Siemens SENTRON 5SJ4263-8HG41 MCB, 2P D 63 A, DIN rail","metaDescription":"Siemens SENTRON 5SJ4263-8HG41 miniature circuit breaker, 2-pole, D-curve, 63 A rated at 30-40 °C. Active production. 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":"70 mm","Width":"36 mm","Height":"110 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Halogen-Free":"Yes","Silicon-Free":"Yes","Number Of Poles":"2","Type Of Voltage":"AC/DC","lifecycle_stage":"current","Fastening Method":"on standard mounting rail","Mounting Position":"any","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"3","Product Designation":"Miniature circuit breakers","acc. to IEC 81346-2":"F","at AC / rated value":"63 A","protection class IP":"IP20, with connected conductors, IP 40 in the handle range","Overvoltage Category":"3","Tunnel Terminals Top":"No","Vibration Resistance":"50 m/s² at 25 to 150Hz and 60m/s² at 35Hz (4sec)","Combined Terminal Top":"Yes","Design Of The Product":"Miniature circuit-breaker 5SJ4","Number Of Poles / Note":"2P","acc. to DIN EN 61346-2":"F","Product Function / Note":"Terminal tightening torque for Cu, 60/75°C; 3.5Nm/31lb.in","Tunnel Terminals Bottom":"No","at 30 °C / rated value":"63 A","at 40 °C / rated value":"63 A","at 45 °C / rated value":"61.7 A","at 50 °C / rated value":"60.4 A","at 55 °C / rated value":"59.1 A","at 60 °C / rated value":"58 A","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"2","Tripping Characteristic Class":"D","at DC / rated value / maximum":"60 V","acc. to EN 60898 / rated value":"10 kA","Position / Of Power Supply Cord":"Any","acc. to IEC 60947-2 / rated value":"15 kA","Product Feature / Touch Protection":"Yes","supply voltage / at AC / rated value":"400 V","installation environment regarding EMC":"Suitable for environment B (immunity to interference not applicable)","Influence Of The Surrounding Temperature":"max. 95% humidity","insulation voltage / at AC / rated value":"440 V","Product Function / Neutral Conductor Switching":"No","Mechanical Service Life (Operating Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/c2c44fa0faed6bcd4a97b803cf1c4059.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=7423&mlfb=5SJ4263-8HG41","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SJ4263-8HG41/alternatives.json"},"ai":{"faq":[{"question":"What is the 5SJ4263-8HG41 rated current at elevated temperatures?","answer":"It is rated 63 A at 30 °C and 40 °C ambient. At 45 °C it derates to 61.7 A, at 50 °C to 60.4 A, at 55 °C to 59.1 A, and at 60 °C to 58 A."},{"question":"Will 5SJ4263-8HG41 drop into a panel specified around 5SJ6220-6?","answer":"Both are 2-pole Siemens MCBs on the same DIN-rail footprint, but the 5SJ6220-6 is a B-curve 20 A device while this is a D-curve 63 A. The physical fit is identical — same 36 mm width, same 70 mm depth — but the trip curve and current rating are completely different, so a direct swap without load recertification is not advised."},{"question":"Where can I buy 5SJ4263-8HG41 and how is it quoted?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at the time of quote."},{"question":"What compliance documentation is available for 5SJ4263-8HG41?","answer":"The SENTRON series carries IEC certification (acc. to IEC 81346-2 and DIN EN 61346-2). The design is halogen-free and silicon-free. Specific UL, RoHS, or REACH declarations should be requested at quote time for your jurisdiction."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SJ4263-8HG41","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/5SJ4263-8HG41 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}}