{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4205-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4205-7","canonicalUrl":"https://aoctrl.com/siemens/5SY4205-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4205-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY4205-7, 2-pole miniature circuit breaker, C-curve, 10 kA (EN 60898-1) / 35 kA (IEC 60947-2), 400 V AC, 36 mm wide.","salesMarkdown":"The Siemens 5SY4205-7 is a 2-pole SENTRON miniature circuit breaker with a C-curve trip characteristic, rated 10 kA breaking capacity per EN 60898-1 and 35 kA per IEC 60947-2 at 400 V AC. That dual rating means it covers both residential-distribution board specs (EN) and industrial panel fault-current requirements (IEC) — the 35 kA figure is the one that matters when you're feeding a motor control center or a cement plant distribution board with a high prospective short-circuit current. The C-curve trips at 5 to 10 times rated current, so it's sized for motor and transformer inrush without nuisance tripping on a cold start. ## Dust, heat, and vibration Rated for ambient temperatures from -40 °C to 75 °C, so it lives in a hot control room next to a kiln or a cold unheated substation without derating drama. Vibration resistance per IEC 60068-2-6: ±1 mm at 5 to 25 Hz and 50 m/s² at 25 to 150 Hz — that's enough to survive on a vibrating conveyor panel or a crusher-plant wall. IP20 with connected conductors means it's sealed against finger contact but not dust ingress; mount it inside an enclosure that eats the dust and runs. ## Panel fit and wiring Width is 36 mm (2 modular units), depth 76 mm, height 90 mm. Snaps onto DIN rail via the quick assembly system — no tools needed. Mounting position any, so you can lay it sideways in a shallow gland plate if needed. Combined terminals top and bottom accept supply from either end; neutral conductor switching is not built in (this is a 2-pole breaker switching both phases, not a switched-neutral device). Pollution degree 3, overvoltage category III — rated for the heat, not the office. ## DC and multi-phase capability Rated 15 kA at DC per IEC 60947-2, so it can also serve DC distribution in a solar combiner or a battery bank. Multi-phase operation at 440 V AC matches 480 V delta systems common in North American industrial panels. Single-phase operation also at 440 V AC. Frequency range 50/60 Hz — standard line frequency, no derating needed.","metaTitle":"Siemens 5SY4205-7 SENTRON MCB, 2P C-Curve, 10 kA, 76 mm","metaDescription":"Siemens 5SY4205-7 SENTRON miniature circuit breaker, 2-pole C-curve, 10 kA per EN 60898-1, 35 kA per IEC 60947-2. Active production, sourced to order. Request quote.","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":"5SY4205-7","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Standard":"IEC / EN 60898-1, IEC / EN 60947-2 / UL1077","description":"Miniature circuit breaker 400 V 10kA, 2-pole, C, 0.5A, D=70 mm","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","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":"C","according to EN 60898 rated value":"10 kA","according to IEC 60947-2 rated value":"35 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","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":"0.8 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/7faebabd3c3f7fba8ef856943421792f.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=326663&mlfb=5SY4205-7"},"ai":{"faq":[{"question":"Where can I buy 5SY4205-7 and how do I get a price?","answer":"Sourced and quoted to order against an RFQ through independent distribution channels. Submit a request for quote (RFQ) to confirm current pricing and availability — no stock figures or lead-time numbers are published here."},{"question":"What is the breaking capacity of 5SY4205-7?","answer":"10 kA per EN 60898-1 and 35 kA per IEC 60947-2 at 400 V AC. The 35 kA figure is the industrial rating that governs fault-current clearing in panelboards with high available short-circuit current."},{"question":"What is the temperature range for 5SY4205-7?","answer":"Rated from -40 °C to 75 °C ambient, covering both cold substations and hot control rooms near kilns or furnaces without derating."},{"question":"What compliance documentation does Siemens provide for 5SY4205-7?","answer":"The breaker is certified to IEC / EN 60898-1 and IEC / EN 60947-2, plus UL 1077 and CSA C22.2 No. 235. It is halogen-free and silicon-free. Standard compliance documentation (RoHS, REACH, CE, UKCA, EAC) is available from the manufacturer's documentation portal."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4205-7","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/5SY4205-7 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}}