{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY5240-6CC11","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY5240-6CC11","canonicalUrl":"https://aoctrl.com/siemens/5SY5240-6CC11","factsUrl":"https://aoctrl.com/api/mcp/products/5SY5240-6CC11","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY5240-6CC11 miniature circuit breaker, universal current, 440 V DC / 400 V AC, 10 kA, 2-pole, B characteristic, 40 A, for railway applications.","salesMarkdown":"The 10 kA DC breaking capacity at 440 V per IEC 60947-2 means this breaker can safely interrupt a fault up to that level on a DC bus — critical for traction battery banks, converter feeds, or wayside power supplies where AC-only breakers would arc and fail. The operating temperature range of -40 to +70 °C covers unheated equipment compartments and outdoor cabinets across most climates, and the -40 to +75 °C storage range means it can sit in a warehouse or on a shelf without degradation. Combined terminals at both top and bottom accept solid or stranded conductors from 0.75 to 35 mm², with a tightening torque of 2.5 to 3.5 N·m (22 to 31 lbf·in). The terminal design allows daisy-chaining without separate busbars for some configurations. The breaker is sealable (padlockable handle) and touch-protected per IP20 with conductors connected. Halogen-free and silicon-free construction avoids outgassing issues in sealed railway enclosures or near sensitive electronics. Polarity must be observed on the DC supply side — the breaker is not polarity-agnostic.","metaTitle":"Siemens 5SY5240-6CC11 SENTRON MCB, 40 A, 2P, B Curve, 10 kA","metaDescription":"Siemens SENTRON 5SY5240-6CC11 miniature circuit breaker. 40 A, 2-pole, B tripping characteristic, 10 kA DC at 440 V, 400 V AC. Active production, sourced to order. Quoted against R","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["2-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Solid":"0.75 ... 35 mm²","Width":"36 mm","title":"5SY5240-6CC11","Height":"90 mm","Sealable":"Yes","Stranded":"0.75 ... 35 mm²","description":"Circuit breaker Universal current 440 V DC 400 V AC 10kA, 2-pole, B, 40 A for railway applications","Halogen-Free":"Yes","Silicon-Free":"Yes","Mounting type":"Quick assembly system","During Storage":"-40 ... +75 °C","Number of poles":"2","Type of voltage":"DC","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","Ambient temperature":"-40 ... +70 °C","Product designation":"Miniature circuit breaker","Protection class IP":"IP20, with connected conductors","at DC / rated value":"440 V","Overvoltage category":"III","Combined Terminal Top":"Yes","Design of the product":"For railway applications","Number of width units":"2","Number of poles / Note":"2P","acc. to DIN EN 61346-2":"F","acc. to DIN EN 81346-2":"F","Combined Terminal Bottom":"Yes","Tripping characteristic class":"B","at DC / rated value / maximum":"500 V","Position / of power supply cord":"Consider polarity","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","at DC / acc. to IEC 60947-2 / rated value":"10 kA","Tightening torque / with screw-type terminals":"2.5 ... 3.5 N·m","Product function / neutral conductor switching":"No","Tightening torque [lbf·in] / with screw-type terminals":"22 ... 31 lbf·in"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/40b2572a9fd857ddbde428826acc9a4e.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=45251&mlfb=5SY5240-6CC11"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 5SY5240-6CC11?","answer":"Submit an RFQ against this order code. The part is sourced to order through independent distribution; availability and current pricing are confirmed at quote time."},{"question":"What is the closest functional alternative to 5SY5240-6CC11?","answer":"The 5SY5240-7 is the closest sibling — same 40 A, 2-pole, 440 V DC / 400 V AC rating, same footprint and terminal specs, but with a C tripping characteristic (5–10× In) instead of B, and a higher DC breaking capacity of 15 kA per IEC 60947-2. If your load has higher inrush (small motors, capacitive loads), the 5SY5240-7 is a direct mechanical swap; for low-surge loads, stick with the B curve of the -6CC11."},{"question":"Will 5SY5240-6CC11 drop into a panel specified around 5SY5240-7 without rewiring?","answer":"Yes — both share the same 36 mm width, 76 mm depth, 90 mm height, quick-assembly DIN-rail mount, and combined terminal design accepting 0.75 to 35 mm² conductors. The swap is mechanical and electrical; only the trip curve and DC breaking capacity differ."},{"question":"What compliance documentation does Siemens provide for 5SY5240-6CC11?","answer":"The breaker is designed per IEC 60947-2 for DC breaking capacity and carries the SENTRON brand. It is halogen-free and silicon-free. For specific RoHS, REACH, UL, or railway-standard declarations, request the manufacturer's declaration of conformity with your RFQ — those documents are not reproduced in this listing."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY5240-6CC11","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/5SY5240-6CC11 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}}