{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY7240-8CC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY7240-8CC","canonicalUrl":"https://aoctrl.com/siemens/5SY7240-8CC","factsUrl":"https://aoctrl.com/api/mcp/products/5SY7240-8CC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY7CC series, Miniature circuit breaker, 5SY7240-8CC, 2-pole, 40 A, D-curve, 400 V AC, 15 kA IEC 60947-2.","salesMarkdown":"## 40 A D-curve MCB for industrial feeder and motor circuits Its 15 kA breaking capacity per IEC 60947-2 (at 400 V AC) handles substantial fault currents upstream in an industrial panel; the 5 kA rating per UL 1077 and CSA C22.2 No. 235 covers North American installations. Terminal capacity accepts solid or stranded conductors from 0.75 mm² up to 35 mm², with a tightening torque range of 2.5 to 3.5 N·m; that covers most panel feed conductors up to a 4 AWG equivalent. Both top and bottom terminals are combined (line/load reversible), and the unit is sealable for tamper-proofing in metering or critical circuits.","metaTitle":"Siemens 5SY7240-8CC SENTRON MCB, 40 A D-Curve, 2-Pole, 400 V","metaDescription":"Siemens 5SY7240-8CC SENTRON miniature circuit breaker, 40 A, D tripping characteristic, 2-pole, 400 V AC, 15 kA IEC breaking capacity. Current lifecycle stage. Available 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","Solid":"0.75 ... 35 mm²","Width":"36 mm","Height":"90 mm","Sealable":"Yes","Stranded":"0.75 ... 35 mm²","Rated Value":"50/60 Hz","Halogen-Free":"Yes","Silicon-Free":"Yes","Mounting type":"Quick assembly system","During Storage":"-40 ... +75 °C","Number of poles":"2","Type of voltage":"AC","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","Ambient temperature":"-25 ... +55 °C","Product designation":"Miniature circuit breaker","Protection class IP":"IP20, with connected conductors","at AC / rated value":"400 V","Overvoltage category":"III","Combined Terminal Top":"Yes","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","circuit-breaker / Design":"5SY7CC","Suitability for operation":"Mechanical engineering / industry","Current / at AC / rated value":"40 A","Tripping characteristic class":"D","at DC / rated value / maximum":"72 V","Position / of power supply cord":"Any","acc. to IEC 60947-2 / rated value":"15 kA","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 AC / acc. to UL 1077 and CSA C22.2 No.235":"5 kA","Tightening torque / with screw-type terminals":"2.5 ... 3.5 N·m","Product function / neutral conductor switching":"No","with multi-phase operation / at AC / rated value":"440 V","with single-phase operation / at AC / rated value":"440 V","Mechanical service life (switching cycles) / typical":"10 000","Tightening torque [lbf·in] / with screw-type terminals":"22 ... 31 lbf·in"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/14390db7d2ee7ceb30476682c07cb045.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=339772&mlfb=5SY7240-8CC","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY7240-8CC/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of the 5SY7240-8CC?","answer":"The rated breaking capacity is 15 kA per IEC 60947-2 at 400 V AC, and 5 kA per UL 1077 and CSA C22.2 No. 235."},{"question":"Will 5SY7240-8CC drop into a panel that was specified around 5SY7140-8CC without rewiring?","answer":"Yes — both are 2-pole, 40 A MCBs in the same SENTRON 5SY footprint (36 mm wide, 76 mm deep), with identical terminal capacity. The only change is the trip curve: D-curve on the 5SY7240-8CC versus C-curve on the 5SY7140-8CC. Mechanical fit and wiring are identical."},{"question":"Where can I buy the 5SY7240-8CC?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY7240-8CC","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/5SY7240-8CC when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}