{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL4640-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL4640-8","canonicalUrl":"https://aoctrl.com/siemens/5SL4640-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SL4640-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SL miniature circuit breaker, 4-pole (3P+N), D tripping characteristic, 40 A rated at 30 °C, 10 kA breaking capacity per EN 60898 and IEC 60947-2, 400 V AC, 4 MW units.","salesMarkdown":"Rated 40 A at 30 °C and 400 V AC, it delivers a 10 kA breaking capacity under both EN 60898 and IEC 60947-2 — enough for residential and light commercial infrastructure panels where high inrush loads (transformers, motor starters) are present. The D-curve means it tolerates short-duration surges up to 10–20× rated current before tripping, so nuisance trips on startup are rare. The 40 A rating is at 30 °C ambient; at 40 °C it derates to 37.89 A, at 45 °C to 36.8 A, and at 55 °C to 34.47 A. If your panel runs warm — say, a crowded DIN-rail enclosure — size the upstream load accordingly. The 10 kA SCCR (both EN 60898 and IEC 60947-2) tells you this breaker safely interrupts a fault up to 10 kA at 400 V without welding contacts or cascading failure upstream. Installation depth is 70 mm; total depth 76 mm. Mounting position is unrestricted — horizontal, vertical, or upside-down on the rail — and the housing is sealable, halogen-free, and silicon-free.","metaTitle":"Siemens 5SL4640-8 SENTRON MCB, 4P D-curve 40 A, 10 kA","metaDescription":"Siemens 5SL4640-8 SENTRON miniature circuit breaker, 4-pole (3P+N), D-curve, 40 A rated, 10 kA breaking capacity per EN 60898 / IEC 60947-2. Active production. Quoted 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":"5SL4640-8","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 400 V 10kA, 3+N-pole, D, 40 A","Halogen-Free":"Yes","Silicon-Free":"Yes","Number Of Poles":"4","Type Of Voltage":"AC","lifecycle_stage":"current","Mounting Position":"any","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"2","Product Designation":"Miniature circuit breaker","acc. to IEC 81346-2":"F","at AC / rated value":"40 A","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Design Of The Product":"5SL miniature circuit breakers","Number Of Poles / Note":"3P+N","acc. to DIN EN 61346-2":"F","Energy Limitation Class":"3","at 30 °C / rated value":"40 A","at 40 °C / rated value":"37.89 A","at 45 °C / rated value":"36.8 A","at 55 °C / rated value":"34.47 A","Suitability For Operation":"Residential buildings/infrastructure","Number Of Modular Width Units":"4","Tripping Characteristic Class":"D","at DC / rated value / maximum":"72 V","acc. to EN 60898 / rated value":"10 kA","acc. to IEC 60947-2 / rated value":"10 kA","Product Feature / Touch Protection":"Yes","supply voltage / at AC / rated value":"400 V","Influence Of The Surrounding Temperature":"+55 °C, max. 95% humidity","with multi-phase operation / at AC / maximum":"440 V","Product Function / Neutral Conductor Switching":"Yes","with multi-phase operation / at AC / rated value":"440 V","Mechanical Service Life (Switching Cycles) / Typical":"10 000"}},"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=435771&mlfb=5SL4640-8"},"ai":{"faq":[{"question":"What is the breaking capacity of the 5SL4640-8?","answer":"10 kA per both EN 60898 and IEC 60947-2 at 400 V AC. That covers most residential and light commercial distribution panels."},{"question":"Where can I buy the 5SL4640-8 and get current pricing?","answer":"This part is sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."},{"question":"Will the 5SL4640-8 drop into a panel specified for a 5SL6550-7BB?","answer":"Both are 4-pole SENTRON 5SL MCBs on the same DIN-rail footprint (4 MW, 72 mm wide). The 5SL4640-8 is a 40 A D-curve; the 5SL6550-7BB is a different rating/curve. If the panel was built for the same pole count and width, it will physically fit without rewiring — but verify the load current and tripping characteristic match your circuit."},{"question":"What compliance documentation does Siemens provide for the 5SL4640-8?","answer":"The part carries EN 60898 and IEC 60947-2 ratings, overvoltage category III, pollution degree 2, and is halogen-free and silicon-free. 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":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL4640-8","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/5SL4640-8 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}}