{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL4240-7RC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL4240-7RC","canonicalUrl":"https://aoctrl.com/siemens/5SL4240-7RC","factsUrl":"https://aoctrl.com/api/mcp/products/5SL4240-7RC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SL4240-7RC miniature circuit breaker, 2-pole, C-curve, 40 A, 10 kA breaking capacity per EN 60898 at 415 V AC, 18 mm width.","salesMarkdown":"The Siemens 5SL4240-7RC is a 2-pole SENTRON miniature circuit breaker with a C tripping characteristic, rated 40 A and a 10 kA breaking capacity per EN 60898 at 415 V AC. That 10 kA rating means it can safely interrupt a fault current up to 10,000 amps without welding its contacts or failing — enough headroom for most residential and light commercial distribution boards where the prospective short-circuit current stays under that threshold. At 18 mm wide (one modular width unit), this 2-pole breaker occupies a single 18 mm slot on a standard DIN rail. The 40 A rating on a 2-pole breaker covers single-phase 40 A circuits or two legs of a three-phase system. Rated operational voltage is 415 V AC, with a maximum of 440 V AC in multi-phase operation. The 10 kA breaking capacity is per EN 60898, the standard for household and similar installations; the same part also carries a 10 kA rating per IEC 60947-2 for industrial applications.","metaTitle":"Siemens 5SL4240-7RC SENTRON MCB, 2P C 40A 10kA","metaDescription":"Siemens SENTRON 5SL4240-7RC miniature circuit breaker, 2-pole, C-curve, 40 A, 10 kA breaking capacity per EN 60898 at 415 V AC. Active production, sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["2-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":"2P","Number Of Poles":"2","lifecycle_stage":"current","Mounting Position":"any","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"2","Product Designation":"Miniature circuit breaker","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Energy Limitation Class":"3","Suitability For Operation":"Residential buildings/infrastructure","at DC rated value maximum":"72 V","Number Of Modular Width Units":"1","Tripping Characteristic Class":"C","supply voltage at AC rated value":"415 V","according to EN 60898 rated value":"10 kA","Type Of Voltage Of The Operating Voltage":"AC","with multi-phase operation at AC maximum":"440 V","Value Range Of The Supply Voltage Frequency":"50/60 Hz","with multi-phase operation at AC rated value":"440 V","with single-phase operation at AC rated value":"250 V","vibration resistance according to IEC 60068-2-6":"no","Mechanical Service Life (Operating Cycles) Typical":"10 000","Product Extension Installable Supplementary Devices":"Yes","power loss [W] for rated value of the current at AC in hot operating state per pole":"4.1 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/77b3fe62c514fdaf9d52ccbc99f9d87c.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=166275&mlfb=5SL4240-7RC","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SL4240-7RC/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 5SL4240-7RC?","answer":"Pricing and availability are confirmed at quote time against an RFQ. Submit a request through the storefront for a current quote."},{"question":"What is the difference between 5SL4240-7RC and 5SL4363-7?","answer":"The 5SL4363-7 is a 3-pole, 63 A version of the same SENTRON C-curve MCB family. It shares the same 76 mm depth and 90 mm height but is 54 mm wide (3 modular units) versus the 18 mm width of the 2-pole 40 A 5SL4240-7RC. The 5SL4363-7 also has a higher power loss per pole (5 W vs 4.1 W). They are not drop-in replacements — the pole count, current rating, and physical footprint differ."},{"question":"What compliance documentation does this brand provide for 5SL4240-7RC?","answer":"As a Siemens SENTRON product, the 5SL4240-7RC carries standard certifications for the class: it is rated per EN 60898 and IEC 60947-2, with an IP20 protection class (with connected conductors). The manufacturer provides the usual IEC/EN compliance documentation, including the declaration of conformity and test certificates."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL4240-7RC","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/5SL4240-7RC 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}}