{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4440-8CC11","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4440-8CC11","canonicalUrl":"https://aoctrl.com/siemens/5SY4440-8CC11","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4440-8CC11","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY4440-8CC11, 4-pole D-curve miniature circuit breaker, 40 A rated current, 10 kA breaking capacity at 400 V AC, 72 mm width.","salesMarkdown":"## D-curve 40 A MCB for industrial and railway panels The Siemens 5SY4440-8CC11 is a 4-pole miniature circuit breaker from the SENTRON series, rated 40 A with a D tripping characteristic. Its 10 kA breaking capacity per EN 60898 at 400 V AC means it can safely interrupt fault currents up to that level without upstream coordination issues in a standard industrial distribution board. Rated 400 V AC phase-to-phase, with a multi-phase rating of 440 V AC for four-pole operation. The 72 mm width (4 width units) fits standard 18 mm/module DIN-rail enclosures; mounting position is any, so it works in vertical or horizontal panel layouts without derating. ## Terminal capacity and wiring constraints Accepts solid and stranded conductors from 0.75 to 35 mm² — enough for the full 40 A load without pigtailing. Screw terminals with a tightening torque range of 2.5 to 3.5 N·m; combined terminal design at both top and bottom means you can feed through or loop out without separate busbar connectors. Sealable and touch-protected per the design, suitable for locked or metered enclosures where tamper evidence is required. Ambient temperature range -40 to +70 °C operating, -40 to +75 °C storage.","metaTitle":"Siemens 5SY4440-8CC11 SENTRON MCB, D Curve 40 A 4P 10 kA","metaDescription":"Siemens 5SY4440-8CC11 SENTRON miniature circuit breaker, 4-pole D-curve 40 A, 10 kA breaking capacity per EN 60898, 400 V AC. Current lifecycle stage. Quoted to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["4-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Solid":"0.75 ... 35 mm²","Width":"72 mm","title":"5SY4440-8CC11","Height":"90 mm","Sealable":"Yes","Stranded":"0.75 ... 35 mm²","Rated Value":"50/60 Hz","description":"Miniature circuit breaker 400 V 10kA, 4-pole, D, 40 A for railway applications","Halogen-Free":"Yes","Silicon-Free":"Yes","Mounting type":"Quick assembly system","During Storage":"-40 ... +75 °C","Number of poles":"4","Type of voltage":"AC","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 AC / rated value":"400 V","Overvoltage category":"III","Combined Terminal Top":"Yes","Design of the product":"For railway applications","Number of width units":"4","Number of poles / Note":"4P","acc. to DIN EN 61346-2":"F","acc. to DIN EN 81346-2":"F","Combined Terminal Bottom":"Yes","Suitability for operation":"Mechanical engineering / industry","Current / at AC / rated value":"40 A","Tripping characteristic class":"D","at DC / rated value / maximum":"72 V","acc. to EN 60898 / rated value":"10 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","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,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/8331fcccbc81967f640723b522398dbe.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=492840&mlfb=5SY4440-8CC11"},"ai":{"faq":[{"question":"Will 5SY4440-8CC11 fit a panel designed for 5SY6613-8?","answer":"Both are 4-pole SENTRON MCBs with the same 72 mm width and DIN-rail mounting, so the physical footprint is identical. The key difference is the tripping curve (D vs whatever the peer carries) and the breaking capacity rating — verify the peer's specs before substituting without coordination study."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4440-8CC11","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/5SY4440-8CC11 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}}