{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY8620-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY8620-8","canonicalUrl":"https://aoctrl.com/siemens/5SY8620-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SY8620-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY8620-8, 4-pole (3P+N) miniature circuit breaker, D tripping characteristic, 20 A rated, 30 kA breaking capacity per IEC 60947-2, 50/60 Hz.","salesMarkdown":"The 4-pole design with neutral conductor switching means the neutral pole opens and closes with the phases, which is required for TN-S or TT systems where you need full isolation on all poles. For DC circuits, it's rated 15 kA per the same standard. If you're specifying for a UL 489 panel, note the UL 1077 listing at 5 kA — that's a supplementary protector rating, not a branch-circuit rating, so check your panel SCCR requirements before committing the BOM line. The D curve's magnetic trip threshold is 10 to 20 times In (200 to 400 A for this 20 A unit), which coordinates well downstream of a larger SENTRON MCCB or an NH fuse. Upstream selectivity with a 63 A gG fuse is achievable for fault currents up to around 6 kA — typical for a sub-distribution board feeding motor groups. Rated for ambient temperatures from -40 °C to 75 °C, with derating above 45 °C: 20 A at 45 °C, 19.5 A at 50 °C, 18.98 A at 55 °C. Vibration resistance per IEC 60068-2-6: ±1 mm at 5 to 25 Hz, 50 m/s² at 25 to 150 Hz.","metaTitle":"Siemens 5SY8620-8 SENTRON MCB, 4P D-curve 20 A, 30 kA","metaDescription":"Siemens 5SY8620-8 SENTRON miniature circuit breaker, 4-pole 3P+N, D characteristic, 20 A rated, 30 kA breaking capacity per IEC 60947-2. Current lifecycle stage, sourced to order.","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":"5SY8620-8","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 400 V D=70 mm 25 kA according to EN 60947-2, 3P+N, D20","Halogen-Free":"Yes","Silicon-Free":"Yes","Number Of Poles":"4","Type Of Voltage":"AC","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":"20 A","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","Number Of Poles / Note":"3P+N","acc. to DIN EN 61346-2":"F","at 45 °C / rated value":"20 A","at 50 °C / rated value":"19.5 A","at 55 °C / rated value":"18.98 A","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"4","Tripping Characteristic Class":"D","Position / Of Power Supply Cord":"Any","acc. to IEC 60947-2 / rated value":"30 kA","Product Feature / Touch Protection":"Yes","Supply Voltage Frequency / Rated Value":"50/60 Hz","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","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 Function / Neutral Conductor Switching":"Yes","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 (Operating Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/8f9dcb65d1f58e366d5129beb9305de6.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=283968&mlfb=5SY8620-8"},"ai":{"faq":[{"question":"What is the breaking capacity of the 5SY8620-8?","answer":"30 kA at 400 V AC per IEC 60947-2, 15 kA at DC per the same standard, and 5 kA per UL 1077 / CSA C22.2 No. 235."},{"question":"What does the D tripping characteristic mean for this MCB?","answer":"The D curve trips magnetically at 10 to 20 times the rated current (200–400 A for this 20 A unit), making it suitable for loads with high inrush like motors, transformers, and welding equipment."},{"question":"Where can I buy the 5SY8620-8 and how is it quoted?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What compliance documentation is available for the 5SY8620-8?","answer":"The MCB carries IEC 60947-2, UL 1077, and CSA C22.2 No. 235 certifications. It is halogen-free and silicon-free. Specific RoHS/REACH declarations are provided with the shipment documentation."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY8620-8","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/5SY8620-8 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}}