{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY6425-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY6425-7","canonicalUrl":"https://aoctrl.com/siemens/5SY6425-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SY6425-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY6425-7 miniature circuit breaker, 4-pole, C-curve, 6 kA (EN 60898-1) / 15 kA (IEC 60947-2), 400 V AC, 72 mm wide, IP20.","salesMarkdown":"## What this MCB is and where it fits The Siemens 5SY6425-7 is a SENTRON miniature circuit breaker (MCB) with four poles, a C-trip curve, and a rated breaking capacity of 6 kA per IEC/EN 60898-1 or 15 kA per IEC/EN 60947-2. It's built for 400 V AC distribution panels in mechanical engineering and industrial environments, where the C-curve handles moderate inrush from motor starters and transformer banks without nuisance tripping. Rated 6 kA under the domestic-standard EN 60898-1 and 15 kA under the industrial-standard IEC 60947-2 — the higher figure governs panel SCCR coordination when the breaker is part of a listed industrial assembly. The same 15 kA rating applies at DC (60 V nominal, 72 V max), so it also covers control-circuit protection in DC bus systems. ## What the ratings mean for fit The C-curve trips magnetically at 5 to 10 times rated current, which is the standard choice for mixed resistive-inductive loads in a panel — it won't pop on a motor's starting surge but clears fast on a hard fault. Energy limitation class 3 means it limits let-through energy enough to protect downstream wiring and devices in a properly coordinated system. Pollution degree 3 and overvoltage category III suit it for fixed-installation panels where conductive dust or condensation is present — typical for mill electrical rooms and industrial MCCs. The IP20 rating (with conductors connected) is standard for enclosed panel mounting; no special sealing needed inside a cabinet. The 72 mm width (4 modular units) and 70 mm installation depth fit standard DIN-rail enclosures. Mounting position is unrestricted, and the quick-assembly system clips onto the rail without tools. Combined terminals top and bottom accept supply from either end — no need to flip the breaker for top-feed vs bottom-feed. ## Compliance and documentation The breaker carries approvals to IEC/EN 60898-1, IEC/EN 60947-2, and UL 1077 / CSA C22.2 No.235 (5 kA under UL/CSA). It's halogen-free and silicon-free, which matters for panels in clean-room or corrosive environments where outgassing can't be tolerated. The sealable design allows the installer to lock the toggle position after commissioning.","metaTitle":"Siemens SENTRON 5SY6425-7 MCB, 4-pole C-curve, 6 kA","metaDescription":"Siemens 5SY6425-7 SENTRON miniature circuit breaker, 4-pole, C-curve, 6 kA IEC/EN 60898-1, 15 kA IEC 60947-2, 400 V AC. Quoted to order. Request RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Depth":"76 mm","Width":"72 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":"4P","Number Of Poles":"4","lifecycle_stage":"current","Fastening Method":"Quick assembly system","Mounting Position":"any","at AC rated value":"400 V","at DC rated value":"60 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":"4","Position Of Power Supply Cord":"Any","Tripping Characteristic Class":"C","according to EN 60898 rated value":"6 kA","according to IEC 60947-2 rated value":"15 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","operating voltage at DC rated value maximum":"72 V","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":"2.2 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$24.13","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=334756&mlfb=5SY6425-7","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY6425-7/alternatives.json"},"ai":{"faq":[{"question":"What is 5SY6425-7's depth?","answer":"The depth is 76 mm; installation depth (behind the panel face) is 70 mm."},{"question":"What is 5SY6425-7's width?","answer":"The width is 72 mm, which corresponds to 4 modular width units on a standard DIN rail."},{"question":"Where can I buy 5SY6425-7 and how is it quoted?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm offer."},{"question":"Will 5SY6425-7 drop into a panel specified around 5SY4304-7CV without rewiring?","answer":"Both are 4-pole C-curve MCBs with the same 72 mm width and DIN-rail mounting, so the mechanical fit is identical. The 5SY6425-7 carries higher breaking capacities (15 kA vs the 5SY4304-7CV's lower rating under IEC 60947-2), so it's a drop-in upgrade if the panel SCCR allows it — no rewiring needed."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY6425-7","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/5SY6425-7 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}}