{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY6240-8CC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY6240-8CC","canonicalUrl":"https://aoctrl.com/siemens/5SY6240-8CC","factsUrl":"https://aoctrl.com/api/mcp/products/5SY6240-8CC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY6240-8CC miniature circuit breaker, 2-pole, D characteristic, 40 A rated current, 6 kA breaking capacity (EN 60898).","salesMarkdown":"It breaks fault currents up to 6 kA per EN 60898 and 5 kA per UL 1077 / CSA C22.2 No. 235, so it fits standard North American and European distribution panels. ## DIN-rail footprint and mounting Mounts in any position, secured via the quick assembly system. ## Temperature derating — what the 40 A rating actually delivers The 40 A rating holds at 35 °C ambient. At 40 °C it derates to 37.6 A; at 50 °C to 35.04 A; at 55 °C to 33.68 A. If the panel runs hot — common in crowded enclosures or near heat sources — the effective current capacity drops. The surrounding temperature influence curve also caps humidity: 95 % RH up to 55 °C, 55 % RH to 70 °C, and 35 % RH to 75 °C. The design is sealable, halogen-free, and silicon-free — useful for clean-room or sensitive electronics zones. Touch protection is included on the terminals.","metaTitle":"Siemens 5SY6240-8CC SENTRON MCB, 40 A D-curve 2-pole","metaDescription":"Siemens 5SY6240-8CC SENTRON miniature circuit breaker, 40 A rated, D tripping characteristic, 2-pole, 6 kA breaking capacity per EN 60898. Current production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["2-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"36 mm","title":"5SY6240-8CC","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 400 V 6kA, 2-pole, D, 40 A","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"2P","Number Of Poles":"2","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","at 35 °C / rated value":"40 A","at 40 °C / rated value":"37.6 A","at 45 °C / rated value":"36.36 A","at 50 °C / rated value":"35.04 A","at 55 °C / rated value":"33.68 A","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"2","Tripping Characteristic Class":"D","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":"No","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/54f133591c35eec4abc09c8d58f104c2.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=42073&mlfb=5SY6240-8CC"},"ai":{"faq":[{"question":"Where can I buy 5SY6240-8CC and how do I get a price?","answer":"Sourced and quoted 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":"What is 5SY6240-8CC's listed depth on this component line?","answer":"The depth is 76 mm, with an installation depth of 70 mm. Width is 36 mm (2 modular width units)."},{"question":"What compliance documentation does this brand provide for 5SY6240-8CC?","answer":"The MCB carries ratings per EN 60898 (6 kA) and UL 1077 / CSA C22.2 No. 235 (5 kA). It is designed for overvoltage category III and pollution degree 3. The part is halogen-free and silicon-free."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY6240-8CC","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/5SY6240-8CC 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}}