{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY5440-7CC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY5440-7CC","canonicalUrl":"https://aoctrl.com/siemens/5SY5440-7CC","factsUrl":"https://aoctrl.com/api/mcp/products/5SY5440-7CC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY5CC series miniature circuit breaker, 4-pole, C characteristic, 40 A rated current, 880 V DC, 10 kA breaking capacity per IEC 60947-2.","salesMarkdown":"## DC-rated MCB for 880 V strings The Siemens 5SY5440-7CC is a SENTRON 5SY5CC series miniature circuit breaker rated for 880 V DC with a 10 kA breaking capacity per IEC 60947-2. Four poles, C-curve tripping at 40 A. The DC voltage rating is the headline here — most panel-mount MCBs top out around 250 V DC, so this one handles series-connected PV strings or battery banks where you need a single breaker instead of stacking poles. The 4-pole configuration with no neutral switching tells you it's a DC ungrounded system breaker: all four poles in series for the DC rail, not a three-phase-plus-neutral AC layout. Terminal range 0.75…35 mm² solid or stranded covers everything from control-circuit tails to main feeder cable — no adapter lug needed up to 35 mm². Mounting position any, which simplifies panel layout when the busbar orientation forces a rotated breaker. Width is 72 mm — that's 4 width units on a standard 18 mm/module rail. Combined terminals top and bottom let you feed through or daisy-chain without extra distribution blocks. Screw terminals torque to 2.5…3.5 N·m. Ambient -25…+55 °C operating, storage -40…+75 °C.","metaTitle":"Siemens 5SY5440-7CC SENTRON MCB, 4P C 40A 880VDC 10kA","metaDescription":"Siemens 5SY5440-7CC SENTRON miniature circuit breaker, 4-pole C-curve 40A, rated 880VDC with 10kA breaking capacity per IEC 60947-2. Current production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Depth":"76 mm","Solid":"0.75 ... 35 mm²","Width":"72 mm","Height":"90 mm","Sealable":"Yes","Stranded":"0.75 ... 35 mm²","Halogen-Free":"Yes","Silicon-Free":"Yes","Mounting type":"Quick assembly system","During Storage":"-40 ... +75 °C","Number of poles":"4","Type of voltage":"DC","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 DC / rated value":"880 V","Overvoltage category":"II","Combined Terminal Top":"Yes","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","circuit-breaker / Design":"5SY5CC","Suitability for operation":"Mechanical engineering / industry","Tripping characteristic class":"C","at DC / rated value / maximum":"1 000 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","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","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/af926833cc49ff7ee4d596bb6c36c8eb.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=298948&mlfb=5SY5440-7CC","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY5440-7CC/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy the 5SY5440-7CC and get a price?","answer":"Sourced to order against an RFQ through independent distribution. Submit a request for quote; availability and current pricing are confirmed at quote time."},{"question":"What is the DC voltage rating and breaking capacity?","answer":"Rated 880 V DC with a maximum of 1,000 V DC. Breaking capacity is 10 kA at 880 V DC per IEC 60947-2."},{"question":"What wire sizes does the 5SY5440-7CC accept?","answer":"Terminals accept 0.75 to 35 mm² solid or stranded copper. No adapter lug needed up to 35 mm²."},{"question":"Will the 5SY5440-7CC drop into a panel specified for a 5SY5416-7?","answer":"Both are 4-pole SENTRON 5SY5CC breakers with the same 72 mm width and DIN-rail mount. The 5SY5440-7CC is a 40 A C-curve; the 5SY5416-7 would be a different rating. If the busbar and wiring are sized for 40 A, the physical fit is the same — no rewiring of the DIN rail or terminal layout needed."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY5440-7CC","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/5SY5440-7CC 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}}