{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4440-7KK11","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4440-7KK11","canonicalUrl":"https://aoctrl.com/siemens/5SY4440-7KK11","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4440-7KK11","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY4440-7KK11, 4-pole miniature circuit breaker, C-curve, 40 A rated current, 10 kA / 15 kA breaking capacity, 76 x 72 x 90 mm.","salesMarkdown":"## What this 4-pole C-curve 40 A MCB is built for The Siemens SENTRON 5SY4440-7KK11 is a 4-pole miniature circuit breaker with a C tripping characteristic rated at 40 A at 35 °C (38.4 A at 40 °C, 36.76 A at 50 °C — derate accordingly). It's designed for mechanical engineering and industrial panel applications, built to DIN EN 60898-1 and also rated under IEC 60947-2 with a 15 kA breaking capacity (10 kA under EN 60898-1). The C-curve (tripping characteristic class C) means it holds up to 5–10× rated current for short periods before tripping magnetically — typical for motor circuits, transformers, and lighting banks where inrush is moderate. At 40 A, that's 200–400 A magnetic trip threshold. The quick assembly system (fastening method) lets it snap onto the rail without tools. Installation depth is 70 mm, and the mounting position can be any orientation. Sealable design (yes) means you can lock the toggle in position with a padlock — useful for lockout/tagout on a panel door. Halogen-free and silicon-free construction for applications sensitive to outgassing (railway, marine, clean manufacturing). The product is also designated for railway applications per the design field. The breaking capacity of 15 kA per IEC 60947-2 gives headroom for high-fault panels; the 10 kA per EN 60898-1 is the residential/commercial rating path.","metaTitle":"Siemens 5SY4440-7KK11 SENTRON MCB, 4P C-Curve 40 A, 10/15 kA","metaDescription":"Siemens 5SY4440-7KK11 SENTRON miniature circuit breaker, 4-pole, C-curve, 40 A rated at 35 °C. Breaking capacity 10 kA (EN 60898-1) / 15 kA (IEC 60947-2). Active production. Quoted","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Depth":"76 mm","Width":"72 mm","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Standard":"DIN EN60898-1","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","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"3","Product Designation":"Miniature circuit breaker","at AC / rated value":"40 A","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","Design Of The Product":"For railway applications","Energy Limitation Class":"3","according to EN 61346-2":"F","at 35 °C / rated value":"40 A","at 40 °C / rated value":"38.4 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","according to IEC 81346-2":"F","Suitability For Operation":"Mechanical engineering / industry","Neutral Conductor Switching":"No","Number Of Modular Width Units":"4","Tripping Characteristic Class":"C","Position / Of Power Supply Cord":"Any","according to EN 60898 / rated value":"10 kA","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","Value Range / Of The Supply Voltage Frequency":"50/60 Hz","at DC / according to IEC 60947-2 / rated value":"15 kA","with multi-phase operation / at AC / rated value":"440 V","operating voltage / at DC / rated value / maximum":"72 V","vibration resistance / according to IEC 60068-2-6":"±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz","with single-phase operation / at AC / rated value":"440 V","Mechanical Service Life (Switching Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=106359&mlfb=5SY4440-7KK11","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY4440-7KK11/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 5SY4440-7KK11 and what's the price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm offer."},{"question":"Will 5SY4440-7KK11 drop into a panel specified around 5SY4140-7 without rewiring?","answer":"No — the 5SY4140-7 is 1-pole (1 modular width), while the 5SY4440-7KK11 is 4-pole (4 modular widths). The panel would need a different DIN-rail layout and wiring scheme. Use the 4-pole version if the original spec called for a 4-pole breaker."},{"question":"What compliance documentation does this breaker carry?","answer":"It's certified to DIN EN 60898-1 and IEC 60947-2. The product is halogen-free and silicon-free. For specific RoHS/REACH/UL documentation, the manufacturer provides compliance declarations on request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4440-7KK11","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/5SY4440-7KK11 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}}