{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY5205-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY5205-7","canonicalUrl":"https://aoctrl.com/siemens/5SY5205-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SY5205-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY5205-7 miniature circuit breaker, 2-pole, C-curve, 10 kA breaking capacity per IEC/EN 60898-2 and UL1077, 400 V AC / 440 V DC, 2 MW.","salesMarkdown":"## What it is and where it lands The Siemens 5SY5205-7 is a 2-pole SENTRON miniature circuit breaker with a C tripping characteristic, rated for universal current (AC/DC) operation. It breaks 10 kA per IEC/EN 60898-2 and UL1077, and 15 kA per IEC 60947-2 at DC. That C-curve means it handles moderate inrush — common for motor starters, lighting banks, and small transformer loads — without nuisance tripping on startup, while still clearing a hard fault fast. It snaps onto a DIN rail (2 modular width units, 36 mm wide) and can mount in any position, so it fits tight panel layouts without derating. ## Key ratings and what they mean for fit Rated AC operating voltage is 400 V (single- or multi-phase) and DC is 440 V, with a maximum DC voltage of 500 V. The 10 kA breaking capacity at 400 V AC means it safely interrupts a fault current up to that level without welding contacts or cascading failure upstream — critical for panel coordination studies. At DC the IEC 60947-2 rating jumps to 15 kA, which matters for battery banks or DC bus protection where fault current can be stiffer. The breaker is rated for pollution degree 3 and overvoltage category III, so it's suited for industrial control panels, not just residential load centers. Ambient temperature range is -40 °C to 75 °C, with humidity derating above 55 °C — good for unheated enclosures or hot machine cabinets.","metaTitle":"Siemens 5SY5205-7 SENTRON MCB, C-Curve 2-Pole, 10 kA","metaDescription":"Siemens 5SY5205-7 SENTRON miniature circuit breaker, 2-pole, C-curve, 10 kA breaking capacity per IEC/EN 60898-2 and UL1077. Sourced to order against RFQ.","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":"5SY5205-7","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, C, 0.5 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":"C","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":"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":"0.8 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/d778bd06baf92fe13673e36b43c2571f.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=412335&mlfb=5SY5205-7"},"ai":{"faq":[{"question":"Where can I buy 5SY5205-7 and what is the lead time?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock count or lead-time number is published here."},{"question":"What compliance documentation does Siemens provide for 5SY5205-7?","answer":"The breaker is certified to IEC/EN 60898-2 and UL1077. It is halogen-free and silicon-free. Full RoHS and REACH declarations are available from Siemens upon request."},{"question":"What is the breaking capacity of 5SY5205-7?","answer":"10 kA per IEC/EN 60898-2 and UL1077 at AC, and 15 kA per IEC 60947-2 at DC."},{"question":"What is the tripping characteristic of 5SY5205-7?","answer":"C-curve — designed for moderate inrush currents typical of motor starters, lighting, and small transformers."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY5205-7","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/5SY5205-7 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}}