{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY7225-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY7225-8","canonicalUrl":"https://aoctrl.com/siemens/5SY7225-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SY7225-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON, miniature circuit breaker, 5SY7225-8, 2-pole, D-curve, 25 A at 35 °C, 400 V AC, 15 kA per EN 60898.","salesMarkdown":"## Siemens 5SY7225-8 SENTRON MCB — 2-Pole D-Curve, 25 A, 400 V AC The Siemens SENTRON 5SY7225-8 is a 2-pole miniature circuit breaker with a D tripping characteristic, rated 25 A at 35 °C and 400 V AC. The D-curve (10–20× In) is the right call for transformer or motor branch circuits — it rides through the inrush without opening, then clears a hard fault decisively. Rated 25 A at 35 °C ambient, the 5SY7225-8 derates to 23.8 A at 40 °C, 23.18 A at 45 °C, 22.55 A at 50 °C, 21.88 A at 55 °C, and 21.2 A at 60 °C. Size the load accordingly; do not count on the full 25 A in a tight cabinet. The 15 kA breaking capacity per EN 60898 covers most commercial and light industrial installations; the 25 kA per IEC 60947-2 gives you the higher fault-current rating needed when the prospective short-circuit current exceeds 15 kA, common on larger transformer-fed panels. It is not a residential-grade device. Mount it in any position; the quick-assembly system clips onto standard DIN rail. At 2 modular width units (36 mm wide, 76 mm deep, 90 mm tall), it occupies the same footprint as any other 2-pole SENTRON MCB. Sealable with a lead or tag for lockout/tagout compliance. Touch protection is built in — finger-safe terminals with conductors connected. IP20 with conductors installed; no washdown rating, so keep it inside the panel, not on the machine exterior. ## Integration — DIN-rail panel, 2-module width No special tools beyond a screwdriver and a DIN-rail stop.","metaTitle":"5SY7225-8 SENTRON MCB, 2-Pole, D-Curve, 25 A, 400 V AC","metaDescription":"Siemens 5SY7225-8 miniature circuit breaker, 2-pole D-curve, 25 A at 35 °C, 400 V AC, 15 kA per EN 60898. 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":"5SY7225-8","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 400 V 15kA, 2-pole, D, 25A, D=70 mm","Halogen-Free":"Yes","Silicon-Free":"Yes","Number Of Poles":"2","Type Of Voltage":"AC","lifecycle_stage":"current","Fastening Method":"Quick assembly system","Mounting Position":"any","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"3","Product Designation":"Miniature circuit breaker","acc. to IEC 81346-2":"F","at AC / rated value":"400 V","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","Number Of Poles / Note":"2P","acc. to DIN EN 61346-2":"F","at 35 °C / rated value":"25 A","at 40 °C / rated value":"23.8 A","at 45 °C / rated value":"23.18 A","at 50 °C / rated value":"22.55 A","at 55 °C / rated value":"21.88 A","at 60 °C / rated value":"21.2 A","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"2","Tripping Characteristic Class":"D","acc. to EN 60898 / rated value":"15 kA","Position / Of Power Supply Cord":"Any","acc. to IEC 60947-2 / rated value":"25 kA","Product Feature / Touch Protection":"Yes","Supply Voltage Frequency / Rated Value":"50/60 Hz","Influence Of The Surrounding Temperature":"max. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C","at DC / acc. to IEC 60947-2 / rated value":"15 kA","at AC / acc. to UL 1077 and CSA C22.2 No.235":"5 kA","vibration resistance / acc. to IEC 60068-2-6":"±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz","Product Function / Neutral Conductor Switching":"No","with multi-phase operation / at AC / rated value":"440 V","operating voltage / at DC / rated value / maximum":"72 V","with single-phase operation / at AC / rated value":"440 V","Mechanical Service Life (Operating Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/d3338819a77239c3c5f98905ecb9de76.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=214394&mlfb=5SY7225-8"},"ai":{"faq":[{"question":"What is the 5SY7225-8 rated for in terms of breaking capacity?","answer":"15 kA per EN 60898 and 25 kA per IEC 60947-2 at 400 V AC. The higher IEC rating applies when the installation is designed to that standard, typically for industrial distribution panels with higher prospective fault currents."},{"question":"Does the 5SY7225-8 drop into a panel specified for a 5SY4140-7?","answer":"Both are 2-pole SENTRON MCBs on the same DIN-rail footprint (36 mm wide, 2 modular units). The 5SY7225-8 is a D-curve rated 25 A; the 5SY4140-7 is a C-curve rated 40 A. They share the same physical envelope and terminal layout, so mechanical fit is identical. The tripping curve and current rating are different — verify the branch-circuit load before swapping."},{"question":"What compliance documentation is available for the 5SY7225-8?","answer":"As a Siemens SENTRON product, it carries CE marking per the Low Voltage Directive and is designed to EN 60898 and IEC 60947-2. Halogen-free and silicon-free per the spec. RoHS and REACH declarations are standard from Siemens; request them with your RFQ."},{"question":"Where can I buy the 5SY7225-8 and how is it quoted?","answer":"Sourced through independent industrial-automation distribution. Submit an RFQ with your quantity and target delivery; pricing and availability are confirmed at quote time. No stock count or lead-time figure published here — those vary with market conditions."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY7225-8","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/5SY7225-8 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}}