{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY6640-7CC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY6640-7CC","canonicalUrl":"https://aoctrl.com/siemens/5SY6640-7CC","factsUrl":"https://aoctrl.com/api/mcp/products/5SY6640-7CC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY6640-7CC, 4-pole miniature circuit breaker, 40 A rated, C tripping characteristic, 6 kA breaking capacity (EN 60898), 5 kA (UL 1077), IP20, current production.","salesMarkdown":"The 4-pole (3P+N) design covers three-phase circuits with a switched neutral, common in European distribution boards. ## Derating and ambient temperature — the real-world current limit The 40 A rating holds at 35 °C. At 40 °C it derates to 38.12 A, at 45 °C to 37.12 A, at 50 °C to 36.12 A, and at 55 °C to 35.08 A. If the panel runs warm — say 50 °C inside the enclosure — the breaker's effective continuous current is 36 A, not 40. The surrounding temperature influence curve also caps humidity: 95 % RH up to 55 °C, then 55 % RH up to 70 °C, then 35 % RH up to 75 °C. ## Panel fit — DIN-rail footprint and mounting Width is 72 mm (4 modular units), depth 76 mm, height 90 mm. Fastening method is snap-on, any mounting position. ## Comparison with 5SY7210-7CC — same footprint, different rating The 5SY7210-7CC is a physically identical 4-pole SENTRON MCB but rated at a lower current (10 A vs 40 A) with the same C curve and breaking capacity. The choice is purely the load current: 40 A for feeder circuits or larger loads, 10 A for branch protection. No footprint or coordination change needed.","metaTitle":"Siemens 5SY6640-7CC SENTRON MCB, 40A 4P C-Curve, 6kA IEC","metaDescription":"Siemens SENTRON 5SY6640-7CC miniature circuit breaker, 40A rated, 4-pole (3P+N), C tripping characteristic, 6 kA breaking capacity per EN 60898, 5 kA per UL 1077. Current productio","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["4-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"72 mm","title":"5SY6640-7CC","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","Fastening Method":"Quick assembly system","Mounting Position":"any","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"3","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","Combined Terminal Top":"Yes","acc. to DIN EN 61346-2":"F","Energy Limitation Class":"3","at 35 °C / rated value":"40 A","at 40 °C / rated value":"38.12 A","at 45 °C / rated value":"37.12 A","at 50 °C / rated value":"36.12 A","at 55 °C / rated value":"35.08 A","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"4","Tripping Characteristic Class":"C","acc. to EN 60898 / rated value":"6 kA","Position / Of Power Supply Cord":"Any","Product Feature / Touch Protection":"Yes","Influence Of The Surrounding Temperature":"max. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C","Type Of Voltage / Of The Operating Voltage":"AC","at AC / acc. to UL 1077 and CSA C22.2 No.235":"5 kA","vibration resistance / acc. to IEC 60068-2-6":"±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz","Product Component / Neutral Conductor Switching":"Yes","with multi-phase operation / at AC / rated value":"440 V","operating voltage / at DC / rated value / maximum":"72 V","with single-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/b2b04930f6e5e1df672ac9b0aff2fb36.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=356043&mlfb=5SY6640-7CC"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SY6640-7CC?","answer":"6 kA per EN 60898 and 5 kA per UL 1077. The UL figure is the one to check for North American panel listings."},{"question":"Will 5SY6640-7CC fit in a panel designed for 5SY7210-7CC?","answer":"Yes — same 72 mm width, same 4-pole footprint, same DIN-rail mounting. The only difference is the current rating: 40 A vs 10 A. No rewiring or enclosure modification needed."},{"question":"How do I get current pricing and availability for 5SY6640-7CC?","answer":"Submit an RFQ through the storefront. The part is sourced to order via independent distribution; availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY6640-7CC","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/5SY6640-7CC 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}}