{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4125-8CC11","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4125-8CC11","canonicalUrl":"https://aoctrl.com/siemens/5SY4125-8CC11","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4125-8CC11","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY4125-8CC11 miniature circuit breaker, 1-pole, D characteristic, 25 A rated current, 10 kA breaking capacity per EN 60898, for railway applications.","salesMarkdown":"Rated 25 A at 35 °C and 22.98 A at 40 °C — the 40 °C figure is the one to use for a typical enclosed panel. At 50 °C it derates to 20.72 A, and at 60 °C to 18.22 A. Vibration resistance per IEC 60068-2-6: ±1 mm at 5 to 25 Hz and 50 m/s² at 25 to 150 Hz. That is the railway-relevant spec — it stays closed under the mechanical shock of a passing train or a track-side cabinet. The quick assembly system means it clips in and out without tools — useful for panel builders who need to swap units during commissioning.","metaTitle":"Siemens 5SY4125-8CC11 SENTRON MCB, 25 A, 1P, D Curve, 10 kA","metaDescription":"Siemens 5SY4125-8CC11 SENTRON miniature circuit breaker, 25 A rated at 40 °C, 1-pole, D tripping characteristic, 10 kA breaking capacity per EN 60898. Designed for railway applicat","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"18 mm","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"1P","Number Of Poles":"1","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":"25 A","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","Design Of The Product":"For railway applications","acc. to DIN EN 61346-2":"F","at 35 °C / rated value":"25 A","at 40 °C / rated value":"22.98 A","at 45 °C / rated value":"21.88 A","at 50 °C / rated value":"20.72 A","at 55 °C / rated value":"19.53 A","at 60 °C / rated value":"18.22 A","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"1","Tripping Characteristic Class":"D","acc. to EN 60898 / rated value":"10 kA","Position / Of Power Supply Cord":"Any","Product Feature / Touch Protection":"Yes","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","vibration resistance / acc. to IEC 60068-2-6":"±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz","Product Component / 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 (Switching Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/3cd290d0c11c1ec70b3226a6dbfc3657.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=376628&mlfb=5SY4125-8CC11","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY4125-8CC11/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SY4125-8CC11?","answer":"10 kA per EN 60898 at the rated voltage. That is the standard breaking capacity for a residential/commercial MCB; for higher fault levels, verify coordination with the upstream device."},{"question":"Where can I buy 5SY4125-8CC11 and how is it quoted?","answer":"We source the 5SY4125-8CC11 to order against an RFQ. Availability and current pricing are confirmed at quote time through our independent distribution network."},{"question":"Will 5SY4125-8CC11 drop into a panel specified for 5SY4125-7CV?","answer":"Both are 1-pole SENTRON MCBs with the same 18 mm width and DIN-rail mounting. The 5SY4125-8CC11 is a D-curve 25 A unit for railway applications; the 5SY4125-7CV is a C-curve variant. They share the same footprint and terminal layout, so a direct swap is possible if the tripping characteristic and current rating match the circuit requirements."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4125-8CC11","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/5SY4125-8CC11 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}}