{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY6406-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY6406-7","canonicalUrl":"https://aoctrl.com/siemens/5SY6406-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SY6406-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY6406-7, 4-pole miniature circuit breaker, C-curve, 6 kA (EN 60898) / 30 kA (IEC 60947-2), 400 V AC, halogen-free, sealable, IP20.","salesMarkdown":"Its C-curve tripping characteristic (5–10× In) handles moderate inrush from motor starters and transformers without nuisance trips, while the 6 kA breaking capacity per EN 60898 covers standard domestic/commercial fault levels — but the real headroom is the 30 kA rating per IEC 60947-2, which lets it sit on higher-capacity industrial busways without needing a current-limiting fuse upstream. The dual standard means it's accepted under both wiring-rule (EN 60898) and industrial (IEC 60947-2) regimes; the UL 1077 listing at 5 kA opens North American supplementary-protection applications. The 6 kA EN 60898 rating is the lower bound for residential/commercial schemes. On the DC side, it's rated 15 kA at 60–72 V, so it works in battery-backed DC distribution or solar combiner boxes. IP20 with connected conductors — fine for a closed panel, not for washdown zones. The temperature range (-40 to 75 °C) covers outdoor enclosures in cold climates and hot machinery cabinets; derate the continuous current per the thermal curve above 40 °C. Humidity tolerance is specified up to 95% at 55 °C, tapering to 35% at 75 °C — adequate for non-condensing industrial atmospheres. Standards compliance includes IEC/EN 60898-1, IEC/EN 60947-2, UL 1077, and CSA C22.2 No.235, which covers most global markets.","metaTitle":"Siemens 5SY6406-7 SENTRON MCB, 4P C-curve, 6kA/30kA","metaDescription":"Siemens 5SY6406-7 SENTRON 4-pole MCB, C-curve, 6 kA (EN 60898) / 30 kA (IEC 60947-2). Halogen-free, sealable, IP20. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["4-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"72 mm","title":"5SY6406-7","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 6kA, 4-pole, C, 6 A, D=70 mm","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":"30 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":"1.6 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/4d06bb890b8931e6fd67cabf9583f3fe.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=511526&mlfb=5SY6406-7"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SY6406-7?","answer":"6 kA per EN 60898, 30 kA per IEC 60947-2 at 400 V AC, and 15 kA per IEC 60947-2 at 60–72 V DC. Under UL 1077 it's rated 5 kA."},{"question":"Will 5SY6406-7 drop into a panel specified around 5SY4304-7CV?","answer":"Both are 4-pole SENTRON MCBs on the same DIN-rail footprint (4 MW = 72 mm wide), so the mechanical fit is identical. The key difference is the tripping curve: 5SY6406-7 is C-curve, while 5SY4304-7CV is a different characteristic — check your load type before swapping."},{"question":"Where can I buy 5SY6406-7?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY6406-7","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/5SY6406-7 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}}