{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY5240-7CC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY5240-7CC","canonicalUrl":"https://aoctrl.com/siemens/5SY5240-7CC","factsUrl":"https://aoctrl.com/api/mcp/products/5SY5240-7CC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY5240-7CC, DC miniature circuit breaker, 2-pole, C-characteristic, 40 A, 10 kA at 440 V DC per IEC 60947-2.","salesMarkdown":"In DC circuits, arc extinction is harder than AC because there is no natural zero-crossing; the 2-pole design switches both lines, doubling the arc gap. Rated 40 A, it holds the continuous current in a 40 °C ambient without nuisance tripping. The operating voltage maxes out at 500 V DC, so stay at or below that; polarity must be observed on this unit (noted as 'consider polarity' in the specs). ## Physical fit and mounting The 5SY5240-7CC occupies 2 modular width units (36 mm) on a DIN rail, with a depth of 76 mm and an installation depth of 70 mm behind the panel face. That is a standard footprint — drops into any SENTRON or third-party distribution board that accepts 2-MU breakers. The 'quick assembly system' fastening means it snaps onto the rail and can be removed with a screwdriver without disturbing adjacent units. Sealable with a lead seal if the application requires tamper evidence.","metaTitle":"Siemens SENTRON 5SY5240-7CC Miniature Circuit Breaker, 40 A,","metaDescription":"Siemens SENTRON 5SY5240-7CC DC miniature circuit breaker, 40 A, C trip curve, 2-pole, 10 kA breaking capacity at 440 V DC per IEC 60947-2. Active production, sourced to order again","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["2-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"36 mm","title":"5SY5240-7CC","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit-breaker 440 V DC 10kA, 2-pole, C, 40 A","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"2P","Number Of Poles":"2","lifecycle_stage":"current","Fastening Method":"Quick assembly system","Mounting Position":"any","at DC rated value":"440 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":"Machine manufacture / industry","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Neutral Conductor Switching":"No","Number Of Modular Width Units":"2","Position Of Power Supply Cord":"Consider polarity","Tripping Characteristic Class":"C","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":"DC","at DC according to IEC 60947-2 rated value":"10 kA","operating voltage at DC rated value maximum":"500 V","vibration resistance according to IEC 60068-2-6":"±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz","Product Extension Installable Supplementary Devices":"Yes"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/2bd91e394db028037a8465c50729a032.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=108002&mlfb=5SY5240-7CC"},"ai":{"faq":[{"question":"Will the 5SY5240-7CC drop into a panel that was specified around the 5SY5240-7 without rewiring?","answer":"Yes, the 5SY5240-7CC shares the same 2-pole, 2-MU DIN-rail footprint, 76 mm depth, and 36 mm width as the 5SY5240-7. The only differences are the breaking capacity (10 kA vs 15 kA at 440 V DC per IEC 60947-2) and the AC rating (the -7 is AC/DC rated; the -7CC is DC-only). Physically it is a direct mechanical swap."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY5240-7CC","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/5SY5240-7CC 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}}