{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY7440-6","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY7440-6","canonicalUrl":"https://aoctrl.com/siemens/5SY7440-6","factsUrl":"https://aoctrl.com/api/mcp/products/5SY7440-6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY7440-6, 4-pole miniature circuit breaker, 40 A (at 35 °C), B characteristic, 400 V AC, 15 kA (EN 60898) / 20 kA (IEC 60947-2), IP20, quick-assembly system.","salesMarkdown":"The 400 V AC rating and 15 kA breaking capacity per EN 60898 (20 kA per IEC 60947-2) tell you it can interrupt a fault up to those levels without upstream damage, which matters for selectivity coordination in a distribution panel. The current derates with ambient temperature: 37.6 A at 45 °C, 36.76 A at 50 °C, 35.92 A at 55 °C, 35.04 A at 60 °C. Installation depth is 70 mm. Mounting position is any, so vertical or horizontal orientation works in tight enclosures. Sealable design allows padlocking the toggle in the off position for lockout/tagout.","metaTitle":"Siemens 5SY7440-6 SENTRON MCB, 4P, 40A, B Curve, 15kA","metaDescription":"Siemens 5SY7440-6 SENTRON miniature circuit breaker, 4-pole, 40 A rated at 35 °C, B tripping characteristic, 15 kA (EN 60898) / 20 kA (IEC 60947-2) breaking capacity, 400 V AC. Cur","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":"5SY7440-6","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 400 V 15kA, 4-pole, B, 40A, D=70 mm","Halogen-Free":"Yes","Silicon-Free":"Yes","Number Of Poles":"4","Type Of Voltage":"AC","lifecycle_stage":"current","Fastening Method":"Quick assembly system","Mounting Position":"any","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"3","Product Designation":"Miniature circuit breaker","acc. to IEC 81346-2":"F","at AC / rated value":"400 V","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","Number Of Poles / Note":"4P","acc. to DIN EN 61346-2":"F","Energy Limitation Class":"3","at 35 °C / rated value":"40 A","at 45 °C / rated value":"37.6 A","at 50 °C / rated value":"36.76 A","at 55 °C / rated value":"35.92 A","at 60 °C / rated value":"35.04 A","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"4","Tripping Characteristic Class":"B","acc. to EN 60898 / rated value":"15 kA","Position / Of Power Supply Cord":"Any","acc. to IEC 60947-2 / rated value":"20 kA","Product Feature / Touch Protection":"Yes","Supply Voltage Frequency / Rated Value":"50/60 Hz","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":"15 kA","at AC / acc. to UL 1077 and CSA C22.2 No.235":"5 kA","vibration resistance / acc. to IEC 60068-2-6":"±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz","Product Function / Neutral Conductor Switching":"No","with multi-phase operation / at AC / rated value":"440 V","operating voltage / at DC / rated value / maximum":"72 V","with single-phase operation / at AC / rated value":"440 V","Mechanical Service Life (Operating Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/215563158142d4866887d02572272d5f.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=418772&mlfb=5SY7440-6"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 5SY7440-6?","answer":"Submit an RFQ through this listing. Pricing and stock levels are confirmed at quote time through independent distribution channels — no fixed online price is published."},{"question":"What is 5SY7440-6's listed depth (76 mm) on this component line?","answer":"The overall depth is 76 mm; the installation depth behind the panel face is 70 mm."},{"question":"What is 5SY7440-6's listed width (72 mm) on this component line?","answer":"Width is 72 mm, which corresponds to 4 modular width units (18 mm per unit) on a standard DIN rail."},{"question":"Will 5SY7440-6 drop into a panel that was specified around 5SY7140-8CC without rewiring?","answer":"No — the 5SY7140-8CC is a different pole count and current rating. The 5SY7440-6 is 4-pole 40 A; the 5SY7140-8CC is a different variant. Physical dimensions (72 mm wide, 4 MW) match the SENTRON 4-pole footprint, but verify terminal positions and busbar layout before substitution."},{"question":"What compliance documentation does this brand provide for 5SY7440-6?","answer":"The SENTRON series carries IEC 60898 and IEC 60947-2 ratings on the label. Halogen-free and silicon-free construction is specified. For RoHS, REACH, and UL declarations, request the manufacturer's compliance documentation with your RFQ — these are not listed in the basic spec record."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY7440-6","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/5SY7440-6 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}}