{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4120-6CC11","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4120-6CC11","canonicalUrl":"https://aoctrl.com/siemens/5SY4120-6CC11","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4120-6CC11","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY4120-6CC11, 1-pole miniature circuit breaker, B-curve, 10 kA per EN 60898, designed for railway applications, 18 mm width.","salesMarkdown":"If your line has motor inrush or high inductive loads, a C-curve sibling would be the better fit, but for most panel auxiliaries this B-curve holds fine. The 10 kA breaking capacity at 400 V AC (per EN 60898) means it can safely interrupt a fault current up to 10,000 amps without welding contacts or cascading failure upstream. That's adequate for most secondary distribution panels fed by a transformer of 630 kVA or less. For single-phase operation it's rated at 230 V and 440 V AC, and DC operation up to 72 V. Temperature derating matters in a sealed cabinet: the breaker is rated for ambient up to 75 °C, but humidity must be kept under 35% above 70 °C. In a hot, damp railcar junction box, that derating curve is what keeps the trip threshold predictable. Vibration resistance is specified per IEC 60068-2-6 at ±1 mm from 5 to 25 Hz and 50 m/s² from 25 to 150 Hz — that covers the rail vehicle body and bogie-mounted equipment spectrum. If your application sees higher shock or sustained vibration (e.g., off-road vehicles), this breaker is still a candidate but verify against your specific vibration profile.","metaTitle":"Siemens 5SY4120-6CC11 SENTRON MCB, 1P B-curve 10kA","metaDescription":"Siemens 5SY4120-6CC11 SENTRON miniature circuit breaker, 1-pole, B-curve, 10 kA per EN 60898. Designed for railway applications. Available to order — RFQ for pricing.","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","title":"5SY4120-6CC11","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 230/400 V 10kA, 1-pole, B, 20A for railway applications","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","at AC rated value":"400 V","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"3","Product Designation":"Miniature circuit breaker","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","Design Of The Product":"For railway applications","Energy Limitation Class":"3","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Neutral Conductor Switching":"No","Number Of Modular Width Units":"1","Position Of Power Supply Cord":"Any","Tripping Characteristic Class":"B","according to EN 60898 rated value":"10 kA","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","Value Range Of The Supply Voltage Frequency":"50/60 Hz","operating voltage at DC rated value maximum":"72 V","with multi-phase operation at AC rated value":"440 V","with single-phase operation at AC rated value":"440 V","vibration resistance according to IEC 60068-2-6":"±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz","Mechanical Service Life (Operating Cycles) Typical":"10 000","Product Extension Installable Supplementary Devices":"Yes","supply voltage with single-phase operation at AC rated value":"230 V","power loss [W] for rated value of the current at AC in hot operating state per pole":"2.2 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/5a6fe428ae433aba45ade98fd047e25a.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=390511&mlfb=5SY4120-6CC11"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 5SY4120-6CC11?","answer":"Submit an RFQ through this listing. Pricing and stock are confirmed at quote time through our independent distribution network — no automated price or lead time is published here."},{"question":"Will 5SY4120-6CC11 drop into a panel specified around 5SY4116-6CC without rewiring?","answer":"Yes, the 5SY4120-6CC11 shares the same 18 mm width, 1-pole footprint, and DIN-rail mounting as the 5SY4116-6CC. It's a direct mechanical swap — same terminal layout, same busbar compatibility. The difference is the rated current (20 A vs 16 A) and the breaking capacity rating, so verify the upstream protection coordination if you're uprating."},{"question":"What compliance documentation does this brand provide for 5SY4120-6CC11?","answer":"The SENTRON 5SY series carries CE marking per the Low Voltage Directive and is designed to EN 60898. The breaker is halogen-free and silicon-free, and rated for pollution degree 3 and overvoltage category III. For specific RoHS/REACH declarations, refer to the manufacturer's declaration of conformity available from Siemens."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4120-6CC11","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/5SY4120-6CC11 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}}