{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY6440-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY6440-7","canonicalUrl":"https://aoctrl.com/siemens/5SY6440-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SY6440-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY6440-7, 4-pole miniature circuit breaker, C-trip characteristic, 6 kA breaking capacity per IEC 60898, 10 kA per IEC 60947-2, 400 V AC, width 72 mm (4 MW).","salesMarkdown":"## Panel fit and trip curve The Siemens 5SY6440-7 is a 4-pole SENTRON miniature circuit breaker (MCB) with a C-trip characteristic, rated 6 kA breaking capacity per IEC 60898-1 and 10 kA per IEC 60947-2. ## Breaking capacity and dual-standard compliance Rated breaking capacity is 6 kA at 400 V AC per IEC 60898-1 and 10 kA at 400 V AC per IEC 60947-2. At DC, the unit is rated 15 kA at 60 V (max 72 V) per IEC 60947-2. For UL 1077 / CSA C22.2 No.235 applications, the breaking capacity is 5 kA. ## Mounting and environmental specs The 72 mm width equals 4 modular units, matching the standard grid spacing of most enclosure gland plates. The IP20 rating applies only with connected conductors; the enclosure itself is not sealed against dust ingress. Both top and bottom terminals accept combined (busbar + wire) termination, and the unit is sealable for tamper-evident installations.","metaTitle":"Siemens 5SY6440-7 SENTRON MCB, 4P C-Curve, 6 kA","metaDescription":"Siemens 5SY6440-7 SENTRON 4-pole miniature circuit breaker, C-trip characteristic, 6 kA (IEC 60898) / 10 kA (IEC 60947-2). Active production, sourced to order. Request RFQ for pric","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["4-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"72 mm","title":"5SY6440-7","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Standard":"IEC / EN 60898-1, IEC / EN 60947-2 / UL1077","description":"Miniature circuit breaker 400 V 6kA, 4-pole, C, 40A, D=70 mm","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"4P","Number Of Poles":"4","lifecycle_stage":"current","Fastening Method":"Quick assembly system","Mounting Position":"any","at AC rated value":"400 V","at DC rated value":"60 V","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"3","Product Designation":"Miniature circuit breaker","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","Energy Limitation Class":"3","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Neutral Conductor Switching":"No","Number Of Modular Width Units":"4","Position Of Power Supply Cord":"Any","Tripping Characteristic Class":"C","according to EN 60898 rated value":"6 kA","according to IEC 60947-2 rated value":"10 kA","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 DC according to IEC 60947-2 rated value":"15 kA","Value Range Of The Supply Voltage Frequency":"50/60 Hz","operating voltage at DC rated value maximum":"72 V","with multi-phase operation at AC rated value":"440 V","with single-phase operation at AC rated value":"440 V","at AC according to UL 1077 and CSA C22.2 No.235":"5 kA","vibration resistance according to IEC 60068-2-6":"±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz","Mechanical Service Life (Operating Cycles) Typical":"10 000","Product Extension Installable Supplementary Devices":"Yes","supply voltage with single-phase operation at AC rated value":"230 V","power loss [W] for rated value of the current at AC in hot operating state per pole":"3.5 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/65bd0a6b23149851729c9b094371a491.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=231931&mlfb=5SY6440-7"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 5SY6440-7?","answer":"Submit an RFQ through this listing. Pricing and stock are confirmed at quote time through independent distribution channels."},{"question":"Will 5SY6440-7 drop into a panel that was specified around 5SY4140-7 without rewiring?","answer":"Both are 4-pole SENTRON MCBs with the same 72 mm width (4 MW) and DIN-rail mounting, so the mechanical fit is identical. The 5SY6440-7 carries a C-trip characteristic, while the 5SY4140-7 is a B-curve variant — the trip threshold differs, but the footprint and terminal layout are the same."},{"question":"What compliance documentation does Siemens provide for 5SY6440-7?","answer":"The MCB is certified to IEC / EN 60898-1, IEC / EN 60947-2, and UL 1077 / CSA C22.2 No.235. It is halogen-free and silicon-free. Standard documentation includes the declaration of conformity and a datasheet covering the listed ratings."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY6440-7","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/5SY6440-7 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}}