{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL6640-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL6640-7","canonicalUrl":"https://aoctrl.com/siemens/5SL6640-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SL6640-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SL6640-7 miniature circuit breaker, 3P+N, 40 A, C-curve, 6 kA breaking capacity per IEC 60898, 400 V AC.","salesMarkdown":"## What it is and what it does The Siemens 5SL6640-7 is a 3P+N SENTRON miniature circuit breaker (MCB) rated 40 A at 400 V AC with a C-curve trip characteristic and 6 kA breaking capacity per IEC 60898 (also rated 6 kA per IEC 60947-2). The C-curve means it trips between 5 and 10 times rated current — standard for general-purpose loads like lighting, socket outlets, and small motor circuits where moderate inrush is expected. This is a 4-module-width unit (72 mm wide) that snaps onto DIN rail in any mounting position. ## Thermal derating and ambient limits Rated 40 A at 30 °C ambient, the 5SL6640-7 derates to 38.07 A at 40 °C and 34.97 A at 55 °C. If your panel runs hot — say a packed enclosure near a process line — size the upstream load so continuous current stays under the derated figure at the actual ambient. The operating range spans -40 °C to 75 °C, which covers outdoor cabinets in cold climates and warm electrical rooms. ## Panel fit and integration Snaps onto DIN rail; 72 mm wide (4 modular width units), 90 mm tall, 76 mm deep with 70 mm installation depth. The housing is halogen-free and silicon-free, which matters for clean-room or sensitive electronics environments. Sealable terminals (IP20 with connected conductors) allow lockout/tagout. Overvoltage category III and pollution degree 2 suit fixed-installation distribution boards.","metaTitle":"Siemens 5SL6640-7 SENTRON MCB, 40A C-Curve 3P+N 6kA","metaDescription":"Siemens 5SL6640-7 SENTRON miniature circuit breaker, 40A, C-curve, 3P+N, 6kA breaking capacity per IEC 60898. Active production. Sourced to order against RFQ.","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":"5SL6640-7","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 400 V 6kA, 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","at AC / rated value":"40 A","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Energy Limitation Class":"3","according to EN 61346-2":"F","at 30 °C / rated value":"40 A","at 40 °C / rated value":"38.07 A","at 45 °C / rated value":"36.8 A","at 55 °C / rated value":"34.97 A","according to IEC 81346-2":"F","Suitability For Operation":"Residential buildings/infrastructure","Number Of Modular Width Units":"4","Tripping Characteristic Class":"C","at DC / rated value / maximum":"72 V","according to EN 60898 / rated value":"6 kA","supply voltage / at AC / rated value":"400 V","according to IEC 60947-2 / rated value":"6 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 (Switching Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$22.86","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/37c0844f4e1ce43b8db4cd3f3ce4ae04.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=124945&mlfb=5SL6640-7"},"ai":{"faq":[{"question":"Where can I buy 5SL6640-7 and how do I get a price?","answer":"This part is sourced to order against an RFQ through independent distribution. Submit an RFQ for availability and current pricing."},{"question":"What is 5SL6640-7's listed depth (76 mm) on this component line?","answer":"The depth is 76 mm; installation depth behind the panel is 70 mm."},{"question":"What is 5SL6640-7's listed width (72 mm) on this component line?","answer":"The width is 72 mm, which corresponds to 4 modular width units on a DIN rail."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL6640-7","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/5SL6640-7 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}}