{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY5240-6","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY5240-6","canonicalUrl":"https://aoctrl.com/siemens/5SY5240-6","factsUrl":"https://aoctrl.com/api/mcp/products/5SY5240-6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY5240-6, 2-pole miniature circuit breaker, B characteristic, 10 kA breaking capacity per IEC/EN 60898-2, 400 V AC, 440 V DC.","salesMarkdown":"The 400 V AC / 440 V DC voltage rating means it can switch single-phase or three-phase loads within those limits — the DC rating is particularly relevant for control panels with 24 V or 48 V DC supplies, where the arc extinction differs from AC. This suits single-phase 230 V AC circuits or two-wire DC circuits where both poles need overcurrent protection. The IP20 rating applies only with connected conductors, so the terminals are finger-safe once wired but the busbar area is not protected against moisture; keep it inside a sealed enclosure in washdown environments. The breaker is certified to IEC/EN 60898-2 and UL1077, covering both the IEC household-type standard and the UL supplementary protector standard. This dual certification simplifies panel approvals for equipment exported to North America and Europe. The operating temperature range spans -40 °C to 75 °C, with humidity derating above 55 °C (95% RH up to 55 °C, 55% RH up to 70 °C, 35% RH up to 75 °C). The vibration resistance per IEC 60068-2-6 (±1 mm at 5–25 Hz; 50 m/s² at 25–150 Hz) confirms suitability for installation on machinery or in mobile equipment panels.","metaTitle":"Siemens 5SY5240-6 SENTRON MCB, 2-Pole, B-Curve, 10 kA, 400V","metaDescription":"Siemens 5SY5240-6 SENTRON miniature circuit breaker, 2-pole, B characteristic, 10 kA per IEC/EN 60898-2, 400 V AC. Active production. Quoted to order.","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","title":"5SY5240-6","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Standard":"IEC / EN 60898-2, UL1077","description":"Circuit breaker Universal current 440 V DC 400 V AC 10kA, 2-pole, B, 40 A","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":"440 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":"universal current","Neutral Conductor Switching":"No","Number Of Modular Width Units":"2","Position Of Power Supply Cord":"AC as required, observe DC polarity","Tripping Characteristic Class":"B","at DC according to EN 60898-2":"10 kA","according to EN 60898 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/DC","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":"500 V","with multi-phase operation at AC rated value":"440 V","with single-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 (Operating Cycles) Typical":"5 000","Product Extension Installable Supplementary Devices":"Yes","power loss [W] for rated value of the current at AC in hot operating state per pole":"3.6 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/688a2bfecb47272479a3f05d82ff4c7d.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=47419&mlfb=5SY5240-6"},"ai":{"faq":[{"question":"How do I get current pricing and availability for the 5SY5240-6?","answer":"The part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is the closest functional second-source for the 5SY5240-6?","answer":"The 5SY5240-7 is the same 2-pole B-curve breaker but with a higher breaking capacity — 15 kA per IEC/EN 60898-2 versus 10 kA on the -6. The physical footprint (2 MW, 36 mm wide) and terminal layout are identical, so it drops into the same panel position without rewiring. The -6 is the correct choice where the available fault current stays under 10 kA; the -7 covers installations with higher prospective short-circuit current."},{"question":"Will the 5SY5240-6 drop into a panel specified around the 5SY5240-7 without rewiring?","answer":"Yes. Both breakers share the same 2-module-width footprint (36 mm), the same DIN-rail quick-assembly mounting, and the same terminal layout. The only difference is the breaking capacity: the -6 is rated 10 kA per IEC/EN 60898-2, the -7 is rated 15 kA. If the panel's available fault current is below 10 kA, the -6 is a direct mechanical and electrical replacement."},{"question":"What compliance documentation does Siemens provide for the 5SY5240-6?","answer":"The breaker carries IEC/EN 60898-2 and UL1077 certifications. The housing is halogen-free and silicon-free. The manufacturer provides a declaration of conformity covering the applicable EU directives (Low Voltage Directive, EMC) and the UL recognition mark. RoHS and REACH compliance is standard for the SENTRON series."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY5240-6","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/5SY5240-6 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}}