{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4240-6","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4240-6","canonicalUrl":"https://aoctrl.com/siemens/5SY4240-6","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4240-6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY4240-6, 2-pole miniature circuit breaker, B-curve, 400 V AC / 60 V DC, 10 kA (EN 60898-1) / 15 kA (IEC 60947-2), 2 MW units wide.","salesMarkdown":"## B-curve 2-pole MCB, 10 kA breaking capacity across three standards Its breaking capacity is rated 10 kA per EN 60898-1, 15 kA per IEC 60947-2, and 5 kA per UL 1077 / CSA C22.2 No.235 — so the same unit covers residential, industrial, and North American panel applications without needing a different part number. Rated 400 V AC (440 V max multi-phase or single-phase) and 60 V DC (72 V DC max), it fits standard 400 V three-phase distribution boards and 48 V DC control circuits common in industrial panels. ## DIN-rail fit and environmental range The 5SY4240-6 occupies 2 modular width units (36 mm) on a DIN rail, with a depth of 76 mm and height of 90 mm — the 70 mm installation depth leaves room for wiring behind the panel door. It mounts in any position and uses the quick-assembly system for snap-on installation; the terminals are sealable and accept combined top/bottom wiring for daisy-chaining. Ambient temperature range is -40 °C to 75 °C, with humidity limits of 95% at 55 °C, 55% at 70 °C, and 35% at 75 °C — suitable for unheated enclosures in cold climates or near process heat. ## Active lifecycle and compliance package It carries approvals to IEC / EN 60898-1, IEC / EN 60947-2, and UL 1077 / CSA C22.2 No.235, with IP20 protection (with connected conductors) and overvoltage category III, pollution degree 3 — the standard spec for fixed-installation distribution boards.","metaTitle":"Siemens 5SY4240-6 SENTRON 2-Pole MCB, B-Curve, 10 kA IEC","metaDescription":"Siemens 5SY4240-6 2-pole miniature circuit breaker, B-curve, rated 400 V AC / 60 V DC. Breaking capacity 10 kA per EN 60898-1, 15 kA per IEC 60947-2.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["2-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"36 mm","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Standard":"IEC / EN 60898-1, IEC / EN 60947-2 / UL1077","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"2P","Number Of Poles":"2","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":"2","Position Of Power Supply Cord":"Any","Tripping Characteristic Class":"B","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","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":"3.6 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$168.04","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=16161&mlfb=5SY4240-6","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY4240-6/alternatives.json"},"ai":{"faq":[{"question":"Does Siemens 5SY4240-6 have UL certification?","answer":"Yes, it is listed under UL 1077 and CSA C22.2 No.235 with a 5 kA breaking capacity — this covers North American supplementary protection applications."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4240-6","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/5SY4240-6 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}}