{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL4240-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL4240-7","canonicalUrl":"https://aoctrl.com/siemens/5SL4240-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SL4240-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SL4240-7 miniature circuit breaker, 2-pole, C-curve, 40 A, 10 kA breaking capacity per IEC 60898 and IEC 60947-2, 400 V AC, 2 MW units.","salesMarkdown":"Occupies 2 modular-width units (36 mm) on a DIN rail, with a 76 mm depth and 90 mm height — standard SENTRON footprint that drops into any 18 mm-pitch distribution board. Mounting position is unrestricted, so it can be installed horizontally or inverted if the enclosure layout demands it. That dual rating means the same part satisfies a residential distribution board and a light-industrial panel — no need to spec a different breaker if the application crosses between the two. The 400 V AC rated voltage covers single-phase and three-phase line-to-line supplies up to 440 V maximum. ## Accessories and compliance Halogen-free and silicon-free construction, so it meets the material restrictions common in rail, marine, and clean-room specs.","metaTitle":"Siemens 5SL4240-7 SENTRON MCB, 40A 2P C-Curve 10kA","metaDescription":"Siemens 5SL4240-7 SENTRON miniature circuit breaker, 40 A, 2-pole, C-curve, 10 kA per IEC 60898/60947-2. Active production. Quoted 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":"36 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":"2","Tripping Characteristic Class":"C","supply voltage at AC rated value":"400 V","according to EN 60898 rated value":"10 kA","according to IEC 60947-2 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","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":"3.3 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=345830&mlfb=5SL4240-7","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SL4240-7/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy the 5SL4240-7 and how is it quoted?","answer":"We source the 5SL4240-7 to order against an RFQ. Availability and current pricing are confirmed at quote time through our independent distribution network."},{"question":"Will the 5SL4240-7 drop into a panel specified around the 5SL4363-7?","answer":"No — the 5SL4363-7 is a 3-pole breaker occupying 3 MW (54 mm), while the 5SL4240-7 is 2-pole at 2 MW (36 mm). The depth and height are identical, but the pole count and width differ, so a panel designed for the 3-pole unit would need a different DIN-rail layout or a blank filler."},{"question":"What compliance documentation does Siemens provide for the 5SL4240-7?","answer":"The breaker is halogen-free and silicon-free, and carries IEC 60898 and IEC 60947-2 ratings. Standard Siemens declarations of conformity (CE, UKCA) and material compliance (RoHS, REACH) are available on request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL4240-7","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/5SL4240-7 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}}