{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SJ4125-8HG41","brand":"Siemens","brandSlug":"siemens","productSlug":"5SJ4125-8HG41","canonicalUrl":"https://aoctrl.com/siemens/5SJ4125-8HG41","factsUrl":"https://aoctrl.com/api/mcp/products/5SJ4125-8HG41","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SJ4 miniature circuit breaker, 1-pole, D-curve, 25 A, 10 kA breaking capacity per EN 60898, 60 V DC rated, DIN-rail mount.","salesMarkdown":"The Siemens SENTRON 5SJ4125-8HG41 is a 1-pole miniature circuit breaker with a D tripping characteristic, rated 25 A at both 30 °C and 40 °C ambient. Mounts on standard DIN rail, any position, and takes up a single modular width (18 mm). The IP20 body with IP40 in the handle range means it's panel-protected but not washdown-rated. The 25 A rating holds steady up to 40 °C; above that it derates — 24.25 A at 45 °C, 23.5 A at 50 °C, 22.7 A at 55 °C, 22 A at 60 °C. DC rated at 60 V maximum — fine for control circuits but not for higher-voltage DC bus work. Vibration resistance tested at 50 m/s² over 25–150 Hz and 60 m/s² at 35 Hz (4 s) — holds up on machinery with moderate vibration.","metaTitle":"Siemens SENTRON 5SJ4125-8HG41 MCB, 1-pole D-curve 25 A, 10 k","metaDescription":"Siemens SENTRON 5SJ4125-8HG41 miniature circuit breaker, 1-pole, D-curve, 25 A rated, 10 kA breaking capacity per EN 60898. Active production, DIN-rail mount. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Depth":"70 mm","Width":"18 mm","title":"5SJ4125-8HG41","Height":"110 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 240 V 10kA, 1-pole, D, 25A, D=70 mm according to UL 489","Halogen-Free":"Yes","Silicon-Free":"Yes","Number Of Poles":"1","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":"25 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","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":"25 A","at 40 °C / rated value":"25 A","at 45 °C / rated value":"24.25 A","at 50 °C / rated value":"23.5 A","at 55 °C / rated value":"22.7 A","at 60 °C / rated value":"22 A","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"1","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)","insulation voltage / at AC / rated value":"440 V","Product Function / Neutral Conductor Switching":"No","Mechanical Service Life (Switching Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$34.29 – $93.39","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/196f8b50f00ffe1619ed30bfb5c89ab1.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=94799&mlfb=5SJ4125-8HG41"},"ai":{"faq":[{"question":"What is the depth of 5SJ4125-8HG41?","answer":"70 mm, matching the installation depth."},{"question":"What is the width of 5SJ4125-8HG41?","answer":"18 mm, which is one modular unit."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SJ4125-8HG41","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/5SJ4125-8HG41 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}}