{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4620-7CV","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4620-7CV","canonicalUrl":"https://aoctrl.com/siemens/5SY4620-7CV","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4620-7CV","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 5SY4620-7CV, 4-pole C-curve miniature circuit breaker, 20 A rated at 35 °C, 15 kA breaking capacity per IEC/EN 60947-2, 72 mm width, IP20.","salesMarkdown":"The Siemens 5SY4620-7CV is a 4-pole (3+N) miniature circuit breaker with C-curve tripping characteristic, rated 20 A at 35 °C and carrying a 15 kA breaking capacity per IEC/EN 60947-2. Rated operating voltage is 440 V AC multi-phase, with a maximum DC operating voltage of 72 V. The breaker is designed for mechanical engineering and industrial environments, accepting supply from any position and mountable in any orientation via the quick-assembly system. The 20 A rating holds at 35 °C ambient. At 40 °C the breaker derates to 18.54 A, at 50 °C to 16.9 A, and at 55 °C to 16.08 A. This matters for panels with high internal heat rise — if the breaker sits next to transformers or drives, use the 50 °C column to size the branch. The surrounding humidity limit is 95% at 55 °C, tapering to 35% at 75 °C. Temperature range spans -40 °C to 75 °C, with vibration resistance per IEC 60068-2-6: ±1 mm at 5–25 Hz, 50 m/s² at 25–150 Hz. ## Integration notes The neutral pole is switched (3+N design). Rated frequency is 50/60 Hz. The part carries the designation letter 'F' per both EN 61346-2 and IEC 81346-2 for circuit-breaker function identification in schematics. That is standard for DIN-rail MCBs; no washdown rating here.","metaTitle":"5SY4620-7CV C-Curve MCB, 20 A 4-Pole, 15 kA IEC 60947-2","metaDescription":"Siemens 5SY4620-7CV miniature circuit breaker, C-curve, 20 A at 35 °C, 4-pole 3+N, 15 kA breaking capacity per IEC 60947-2. Current production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["4-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"72 mm","title":"5SY4620-7CV","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Standard":"IEC / EN 60947-2","description":"MCB Icu=15KA 400V 3P+N C20","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"3+N","Number Of Poles":"4","lifecycle_stage":"current","Fastening Method":"Quick assembly system","Mounting Position":"any","at AC rated value":"20 A","Installation Depth":"70 mm","Degree Of Pollution":"3","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","at 35 °C rated value":"20 A","at 40 °C rated value":"18.54 A","at 45 °C rated value":"17.76 A","at 50 °C rated value":"16.9 A","at 55 °C rated value":"16.08 A","according to EN 61346-2":"F","Combined Terminal Bottom":"Yes","according to IEC 81346-2":"F","Suitability For Operation":"Mechanical engineering / industry","Neutral Conductor Switching":"Yes","Number Of Modular Width Units":"4","Position Of Power Supply Cord":"Any","Tripping Characteristic Class":"C","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","operating voltage at DC rated value maximum":"72 V","with multi-phase operation at AC rated value":"440 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","Product Extension Installable Supplementary Devices":"Yes","power loss [W] for rated value of the current at AC in hot operating state per pole":"1.7 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/bad6644ba43abcbf7558cdb1d04cb6ad.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1531702&mlfb=5SY4620-7CV"},"ai":{"faq":[{"question":"What does the 15 kA breaking capacity mean for a 400 V panel?","answer":"The 15 kA rating per IEC 60947-2 means the breaker can safely interrupt a fault current up to 15 kA at the rated voltage. That is sufficient for most industrial sub-distribution boards fed by a transformer in the 630 kVA to 1000 kVA range, assuming the prospective short-circuit current at the breaker terminals does not exceed 15 kA."},{"question":"Where can I buy the 5SY4620-7CV and how is it quoted?","answer":"The 5SY4620-7CV is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock figures are published here."},{"question":"Will the 5SY4620-7CV drop into a panel specified around a 5SY4332-7CV without rewiring?","answer":"Both are 4-pole C-curve MCBs in the same 5SY series, sharing the same 72 mm width and DIN-rail mounting. The difference is the current rating — the 5SY4620-7CV is 20 A, while the 5SY4332-7CV is a different rating. If the branch load is 20 A, the 5SY4620-7CV is a direct mechanical fit; the wiring and busbar connection are identical. Verify the load current before swapping — the C-curve and pole count match."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4620-7CV","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/5SY4620-7CV 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}}