{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4304-6","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4304-6","canonicalUrl":"https://aoctrl.com/siemens/5SY4304-6","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4304-6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON miniature circuit breaker, 5SY4304-6, 3-pole, 4 A, B characteristic, 10 kA breaking capacity per EN 60898, 35 kA per IEC 60947-2, IP20, halogen-free, sealable.","salesMarkdown":"## Siemens 5SY4304-6 SENTRON MCB — 3-pole, 4 A, B-curve The B curve (3–5× In instantaneous trip) is standard for resistive and general-purpose loads: lighting, small heating circuits, control transformers. Rated 4 A at 35 °C, derated to 3.76 A at 40 °C and 3.22 A at 60 °C — the thermal derating curve is published for panel environments where ambient runs above the 35 °C reference point. If your panel hits 50 °C, the breaker is good for 3.5 A continuous. The 10 kA (EN 60898) and 35 kA (IEC 60947-2) ratings mean the same hardware qualifies for both residential/commercial distribution boards (EN 60898) and industrial switchgear (IEC 60947-2) where prospective short-circuit current can be higher. The 15 kA DC rating per IEC 60947-2 covers DC circuits up to that fault level. IP20 with connected conductors means the terminals are finger-safe only when wired — no washdown rating; this stays in a dry enclosure. Snap-on DIN rail mounting via the quick-assembly system; 36 mm width (2 MW), 76 mm depth, 90 mm height. Installation depth is 70 mm. Sealable for tamper-proof locking. Halogen-free and silicon-free construction — suitable for clean-room or semiconductor fab environments where outgassing is a concern.","metaTitle":"Siemens 5SY4304-6 SENTRON MCB, 3P, 4A, B-Curve, 10kA","metaDescription":"Siemens SENTRON 5SY4304-6 miniature circuit breaker, 3-pole, 4 A, B characteristic, 10 kA (EN 60898) / 35 kA (IEC 60947-2). IP20, halogen-free, sealable. Sourced to order; confirm","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["3-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"36 mm","title":"5SY4304-6","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"MCB 400V AC 10kA, 3-pole, B, 4A, T=70mm","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","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":"4 A","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","acc. to DIN EN 61346-2":"F","Energy Limitation Class":"3","at 35 °C / rated value":"4 A","at 40 °C / rated value":"3.76 A","at 45 °C / rated value":"3.63 A","at 50 °C / rated value":"3.5 A","at 55 °C / rated value":"3.36 A","at 60 °C / rated value":"3.22 A","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"2","Tripping Characteristic Class":"B","acc. to EN 60898 / rated value":"10 kA","Position / Of Power Supply Cord":"Any","acc. to IEC 60947-2 / rated value":"35 kA","Product Feature / Touch Protection":"Yes","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","Type Of Voltage / Of The Operating Voltage":"AC","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 Component / 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 (Switching Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/b5a31423259e59b3c7972be317d92522.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1385693&mlfb=5SY4304-6"},"ai":{"faq":[{"question":"What is the breaking capacity of the 5SY4304-6?","answer":"10 kA per EN 60898 and 35 kA per IEC 60947-2 at AC, plus 15 kA at DC per IEC 60947-2."},{"question":"What is the 5SY4304-6 used for?","answer":"It is a 3-pole miniature circuit breaker with B characteristic, rated 4 A, used for overcurrent and short-circuit protection of resistive and general-purpose AC loads in distribution boards and industrial control panels."},{"question":"Where can I buy the 5SY4304-6?","answer":"Sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time."},{"question":"Will the 5SY4304-6 drop into a panel that was specified around the 5SY4304-7CV?","answer":"Both are 3-pole SENTRON MCBs with the same 36 mm width and DIN-rail mounting, so mechanical fit is identical. However, the 5SY4304-7CV carries a different tripping characteristic or rating — verify the B-curve and 4 A rating match your circuit design before substituting."},{"question":"What compliance documentation does Siemens provide for the 5SY4304-6?","answer":"The breaker is halogen-free and silicon-free; it is classified per IEC 81346-2 and DIN EN 61346-2 as function F. Overvoltage category III, pollution degree 3. Standard Siemens declarations (CE, UKCA, RoHS, REACH) apply — request the specific declaration at order time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4304-6","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/5SY4304-6 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}}