{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4301-8CV","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4301-8CV","canonicalUrl":"https://aoctrl.com/siemens/5SY4301-8CV","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4301-8CV","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 5SY4301-8CV, 3-pole miniature circuit breaker, 1 A rated current, D tripping characteristic, 15 kA breaking capacity at 400 V AC per IEC 60947-2, 3 modular width units.","salesMarkdown":"## 1 A D-curve MCB for motor and transformer branch circuits The D-curve holds through 10–20× rated current for short-duration starts, then clears on sustained overload. At 35 °C ambient the breaker carries the full 1 A; at 40 °C it derates to 0.93 A, at 45 °C to 0.89 A, and at 50 °C and 55 °C to 0.8 A. Mount in any position — the quick-assembly system snaps onto standard DIN rail. Three modular width units (54 mm) of DIN space. Halogen-free and silicon-free construction. Humidity tolerance: max 95% RH up to 55 °C, derating to 35% RH at 75 °C. Vibration resistance per IEC 60068-2-6: ±1 mm at 5–25 Hz, 50 m/s² at 25–150 Hz. Sealable terminals (top and bottom combined).","metaTitle":"Siemens 5SY4301-8CV MCB, 1A 3P D-Curve, 15 kA IEC 60947-2","metaDescription":"Siemens 5SY4301-8CV miniature circuit breaker, 1 A, 3-pole, D tripping characteristic, 15 kA breaking capacity per IEC 60947-2. Current production. Available to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["3-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"54 mm","title":"5SY4301-8CV","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Standard":"IEC / EN 60947-2","description":"MCB Icu=15KA 400V 3P D1","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","Degree Of Pollution":"3","at AC / rated value":"1 A","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","according to EN 61346-2":"F","at 35 °C / rated value":"1 A","at 40 °C / rated value":"0.93 A","at 45 °C / rated value":"0.89 A","at 50 °C / rated value":"0.8 A","at 55 °C / rated value":"0.8 A","Combined Terminal Bottom":"Yes","according to IEC 81346-2":"F","Suitability For Operation":"Mechanical engineering / industry","Neutral Conductor Switching":"No","Number Of Modular Width Units":"3","Tripping Characteristic Class":"D","Position / Of Power Supply Cord":"Any","Supply Voltage Frequency / Rated Value":"50/60 Hz","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","with multi-phase operation / at AC / rated value":"440 V","operating voltage / at DC / rated value / maximum":"72 V","vibration resistance / according to IEC 60068-2-6":"±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz","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/94040b722ac109cab0f1e8d43fcb457f.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1531571&mlfb=5SY4301-8CV"},"ai":{"faq":[{"question":"Where can I buy 5SY4301-8CV and get current pricing?","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 price and lead time."},{"question":"Will 5SY4301-8CV drop into a panel specified for 5SY4301-7CV?","answer":"Both are 3-pole, 1 A, D-curve MCBs in the same 5SY4 family with identical dimensions (54 mm width, 76 mm depth), so the 8CV variant is a direct mechanical fit. The difference is in the breaking capacity rating — verify the 7CV's rating against your panel's available fault current before swapping."},{"question":"What compliance documentation does Siemens provide for 5SY4301-8CV?","answer":"The breaker is designed and tested to IEC / EN 60947-2. It carries a CE marking for the European market. Halogen-free and silicon-free construction is confirmed. For specific declarations (RoHS, REACH, UL file number), request the manufacturer's current compliance documents with your RFQ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4301-8CV","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/5SY4301-8CV 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}}