{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL4640-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL4640-7","canonicalUrl":"https://aoctrl.com/siemens/5SL4640-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SL4640-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SL4640-7, miniature circuit breaker, 400 V AC, 10 kA, 3+N-pole, C-curve, 40 A, 4 MW.","salesMarkdown":"The Siemens SENTRON 5SL4640-7 is a 4-module-width (72 mm) miniature circuit breaker with a 3P+N pole configuration, rated 400 V AC and 10 kA breaking capacity per both EN 60898 and IEC 60947-2. The C-curve tripping characteristic means it handles moderate inrush from motor or lighting loads without nuisance tripping — the magnetic trip operates at 5 to 10 times rated current, so a 40 A unit holds through a 200–400 A surge for a few milliseconds. This is the go-to for residential and infrastructure distribution boards where you need a switched neutral in a single housing. ## Sizing and panel fit At 72 mm wide (4 MW), it occupies four 18 mm DIN-rail positions — standard for a 3P+N breaker at this current. Mounting position is unrestricted, so it can go sideways in a tight sub-panel without derating the thermal trip. Power loss per pole is 3.3 W at rated current; four poles sum to 13.2 W heat dissipation inside the enclosure — factor that into your thermal budget if the panel is sealed.","metaTitle":"Siemens SENTRON 5SL4640-7 MCB, 3P+N, 40A, C-Curve, 10kA","metaDescription":"Siemens SENTRON 5SL4640-7 miniature circuit breaker, 400V AC, 10kA breaking capacity per EN 60898 & IEC 60947-2, 3P+N, C-curve, 40A. Active production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["4-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"72 mm","title":"5SL4640-7","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 400 V 10kA, 3+N-pole, C, 40 A","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"3P+N","Number Of Poles":"4","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":"4","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,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/a9e8547dfcbadff7f9790945a1212079.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=50401&mlfb=5SL4640-7"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SL4640-7?","answer":"It is rated 10 kA per both EN 60898 and IEC 60947-2 at 400 V AC. That means it can safely interrupt a fault current up to 10,000 A without welding contacts or cascading failure upstream — sufficient for most residential and light commercial service entrances."},{"question":"Will 5SL4640-7 drop into a panel specified around 5SL4363-7?","answer":"Not without rewiring. The 5SL4640-7 is 4-pole (3P+N) and 72 mm wide (4 MW), while the 5SL4363-7 is 3-pole (3P) and 54 mm wide (3 MW). Both share the same 76 mm depth and 90 mm height, so the DIN-rail clip and enclosure depth are compatible, but the 5SL4640-7 needs an extra 18 mm of rail space and a neutral conductor connection."},{"question":"Where can I buy 5SL4640-7?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm commitment."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL4640-7","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/5SL4640-7 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}}