{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY7205-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY7205-7","canonicalUrl":"https://aoctrl.com/siemens/5SY7205-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SY7205-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY7205-7, 2-pole miniature circuit breaker, C-curve, AC 400 V, 15 kA (EN 60898) / 50 kA (IEC 60947-2), 2 modular width units, IP20.","salesMarkdown":"## What it is and what it does The Siemens 5SY7205-7 is a 2-pole miniature circuit breaker from the SENTRON family, designed for branch-circuit protection in industrial control panels and distribution boards. Its C-curve tripping characteristic means it handles moderate inrush currents — typical for motor starters, contactor coils, and small transformers — without nuisance tripping, while still clearing overloads and short circuits. Rated 400 V AC, it carries a 15 kA breaking capacity per EN 60898 and a 50 kA rating per IEC 60947-2, so it can safely interrupt high-fault currents on a 400 V line. The 2-pole design switches both phase conductors; there is no neutral switching. It snaps onto a DIN rail via the quick assembly system and occupies 2 modular width units (36 mm,). ## What the ratings mean for fit The 15 kA breaking capacity at 400 V AC per EN 60898 is the rating that governs most commercial and light-industrial installations — it tells you the breaker can clear a fault up to that level without welding its contacts or rupturing the case. The 50 kA rating per IEC 60947-2 applies when the breaker is used in an industrial context where the prospective short-circuit current is higher; that figure matches the requirements of a main distribution board fed by a large transformer. For DC circuits, the same 15 kA rating applies per IEC 60947-2. Under UL 1077 and CSA C22.2 No. 235, the interrupting capacity is 5 kA — this matters if the panel is destined for a North American job that requires UL listing. The C-curve trips magnetically between 5 and 10 times rated current, so it holds through the starting surge of a small motor or a bank of contactors. Pollution degree 3 and overvoltage category III confirm it is rated for fixed installations inside an enclosure where conductive pollution is possible — typical for a factory-floor panel. The IP20 rating means it is protected against solid objects larger than 12 mm (fingers) but not against moisture; it must live inside a sealed cabinet. ## Panel integration details Mounts in any position on a DIN rail; the quick assembly system clips it on without tools. Depth is 76 mm, installation depth 70 mm — the extra 6 mm accounts for the front handle and terminal screws. Width is 36 mm, which is 2 modular units, so it occupies two 18 mm slots on the rail. Combined terminals top and bottom accept copper conductors; the sealable feature lets you lock the handle in the OFF position with a padlock for lockout/tagout. Vibration resistance per IEC 60068-2-6: ±1 mm at 5 to 25 Hz, 50 m/s² at 25 to 150 Hz — it holds up on a machine frame or a panel door subject to moderate vibration. Mechanical service life is 10 000 operating cycles typical.","metaTitle":"Siemens 5SY7205-7 SENTRON MCB, 2-Pole, C-Curve, 400V AC, 15k","metaDescription":"Siemens 5SY7205-7 SENTRON miniature circuit breaker, 2-pole, C-curve, rated 400V AC, 15kA (EN 60898) / 50kA (IEC 60947-2). Current production. Quoted 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","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","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":"15 kA","according to IEC 60947-2 rated value":"50 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,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=177820&mlfb=5SY7205-7","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY7205-7/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 5SY7205-7?","answer":"Pricing and stock are confirmed at quote time. Submit an RFQ against this order code; the part is sourced through independent distribution and quoted to order."},{"question":"What is the depth of the 5SY7205-7?","answer":"The overall depth is 76 mm; the installation depth (behind the panel face) is 70 mm."},{"question":"What compliance documentation does Siemens provide for 5SY7205-7?","answer":"The breaker is halogen-free and silicon-free, which supports RoHS and REACH declarations. The brand provides compliance documentation with the shipment."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY7205-7","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/5SY7205-7 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}}