{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4440-7CV","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4440-7CV","canonicalUrl":"https://aoctrl.com/siemens/5SY4440-7CV","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4440-7CV","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY4 series, 4-pole MCB, 40 A, C characteristic, 15 kA per IEC 60947-2, 72 mm wide, IP20.","salesMarkdown":"## What this 40 A 4-pole C-curve MCB is The Siemens 5SY4440-7CV is a 4-pole miniature circuit breaker (MCB) from the SENTRON 5SY4 series, rated 40 A with a C tripping characteristic and a 15 kA breaking capacity certified to IEC / EN 60947-2. The 15 kA breaking capacity at 400/440 V AC meets the fault level expected in most industrial distribution boards downstream of a larger upstream breaker. Temperature derating is published: at 35 °C ambient the 40 A rating holds; at 50 °C it's 35.4 A, and at 55 °C it's 34.2 A. Plan your continuous load at the panel's worst-case ambient, not the 40 A nameplate. The IP20 rating applies only with connected conductors — the terminals are finger-safe once wired. ## Deployment context At 72 mm wide (4 MW), it consumes one standard slot in a 12- or 24-way distribution board. Rated for use in mechanical engineering and general industry environments per the suitability listing.","metaTitle":"Siemens 5SY4440-7CV 4P MCB, 40A C-Curve, 15kA IEC 60947-2","metaDescription":"Siemens 5SY4440-7CV 4-pole MCB, 40A rated, C-trip characteristic, 15kA breaking capacity per IEC 60947-2. Active production, sourced to order. Request quote for current pricing and","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["4-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"72 mm","title":"5SY4440-7CV","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Standard":"IEC / EN 60947-2","description":"MCB Icu=15KA 400V 4P C40","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":"40 A","Installation Depth":"70 mm","Degree Of Pollution":"3","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","at 35 °C rated value":"40 A","at 40 °C rated value":"37.8 A","at 45 °C rated value":"36.64 A","at 50 °C rated value":"35.4 A","at 55 °C rated value":"34.2 A","according to EN 61346-2":"F","Combined Terminal Bottom":"Yes","according to IEC 81346-2":"F","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","Supply Voltage Frequency Rated Value":"50/60 Hz","according to IEC 60947-2 rated value":"15 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","operating voltage at DC rated value maximum":"72 V","with multi-phase operation at AC rated value":"440 V","vibration resistance according to IEC 60068-2-6":"±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz","Mechanical Service Life (Switching Cycles) Typical":"10 000","Product Extension Installable Supplementary Devices":"Yes","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/1cb6455f63176b5f2dedba1ad7350242.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1531636&mlfb=5SY4440-7CV"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SY4440-7CV?","answer":"The breaking capacity is 15 kA per IEC 60947-2 at 440 V AC multiphase operation."},{"question":"Will 5SY4440-7CV drop into a panel specified around 5SY4310-7CV?","answer":"Yes, both share the same 4-pole DIN-rail footprint, 72 mm width (4 MW), and same mounting system. The 5SY4440-7CV is the 40 A variant; the 5SY4310-7CV is a 10 A variant. No rewiring of the busbar or enclosure cutout is needed — just verify the upstream protection is sized for the higher 40 A rating."},{"question":"Where can I buy 5SY4440-7CV?","answer":"It is sourced and quoted to order against an RFQ through independent distribution. Submit a request for quote to confirm current availability and pricing."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4440-7CV","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/5SY4440-7CV 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}}