{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4306-6KK11","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4306-6KK11","canonicalUrl":"https://aoctrl.com/siemens/5SY4306-6KK11","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4306-6KK11","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY4306-6KK11, 3-pole miniature circuit breaker, B-curve, 10 kA breaking capacity per EN 60898-1, 35 kA per IEC 60947-2, 3 modular width units, DIN rail mount.","salesMarkdown":"## What this MCB does in the panel B-curve means the breaker holds through normal resistive load starts but trips fast on a hard short — no nuisance tripping on transformer inrush or motor starting, unlike a C-curve that would let more through. The 10 kA per EN 60898-1 is the standard you need for most building distribution panels; the 35 kA per IEC 60947-2 is the industrial rating that tells the site electrical engineer the unit can clear a high-fault bus without cascading upstream. Rated for 400 V AC (440 V max multi-phase) and 60 V DC (72 V max), with overvoltage category III and pollution degree 3 — so it lives in fixed installations, not clean-room switchgear. Mounting position is any orientation, so it fits vertical or horizontal busbars.","metaTitle":"Siemens 5SY4306-6KK11 SENTRON MCB, 3P, B-Curve, 10kA","metaDescription":"Siemens 5SY4306-6KK11 SENTRON miniature circuit breaker, 3-pole, B-curve, 10 kA per EN 60898-1, 35 kA per IEC 60947-2. Active production, sourced to order. DIN rail mount, 3 MW uni","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Depth":"76 mm","Width":"54 mm","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Standard":"DIN EN60898-1","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"3P","Number Of Poles":"3","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","Design Of The Product":"For railway applications","Energy Limitation Class":"3","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Neutral Conductor Switching":"No","Number Of Modular Width Units":"3","Position Of Power Supply Cord":"Any","Tripping Characteristic Class":"B","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","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","power loss [W] for rated value of the current at AC in hot operating state per pole":"2.1 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=470427&mlfb=5SY4306-6KK11","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY4306-6KK11/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SY4306-6KK11?","answer":"The 5SY4306-6KK11 has a 10 kA breaking capacity per EN 60898-1 and a 35 kA rating per IEC 60947-2. The higher IEC rating gives industrial-grade fault clearing for supply points with high prospective short-circuit current."},{"question":"What does B-curve mean on this MCB?","answer":"B-curve means the breaker trips at 3 to 5 times rated current. It is suited for resistive and general-purpose loads with low inrush — not for motor circuits or transformer primaries that would need a C or D curve."},{"question":"Where can I buy 5SY4306-6KK11?","answer":"The 5SY4306-6KK11 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 commitment."},{"question":"Will 5SY4306-6KK11 drop into a panel built for 5SY4304-7CV?","answer":"Both are 3-pole SENTRON MCBs on the same DIN-rail footprint, so the 5SY4306-6KK11 will physically fit the same rail and busbar. Verify the B-curve and breaking capacity match your coordination study — the 5SY4304-7CV may have different ratings."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4306-6KK11","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/5SY4306-6KK11 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}}