{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY7320-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY7320-8","canonicalUrl":"https://aoctrl.com/siemens/5SY7320-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SY7320-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY7320-8, D-curve miniature circuit breaker, 3-pole, 20 A, 15 kA (EN 60898) / 25 kA (IEC 60947-2), IP20, 76 × 54 × 90 mm.","salesMarkdown":"## D-curve MCB for motor and transformer circuits The Siemens 5SY7320-8 is a 3-pole miniature circuit breaker from the SENTRON series, with a D tripping characteristic rated at 20 A. Breaking capacity is 15 kA per EN 60898 and 25 kA per IEC 60947-2, giving it headroom for industrial panels where fault current can exceed the residential standard. At DC per IEC 60947-2 it still interrupts 15 kA. Rated current derates with ambient temperature: 20 A at 35 °C, 19.04 A at 40 °C, 18.54 A at 45 °C, 18.04 A at 50 °C, 17.5 A at 55 °C, and 16.96 A at 60 °C. Occupies 3 modular width units (54 mm) on a DIN rail, with a depth of 76 mm and an installation depth of 70 mm. Mounts in any position — no orientation restriction for vertical or horizontal rail layouts.","metaTitle":"Siemens 5SY7320-8 SENTRON MCB, D Curve, 20 A, 3-Pole, 15/25","metaDescription":"Siemens 5SY7320-8 SENTRON miniature circuit breaker, D tripping characteristic, 20 A, 3-pole, 15 kA (EN 60898) / 25 kA (IEC 60947-2). Current lifecycle stage. Quoted to order again","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Depth":"76 mm","Width":"54 mm","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","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":"20 A","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","acc. to DIN EN 61346-2":"F","at 35 °C / rated value":"20 A","at 40 °C / rated value":"19.04 A","at 45 °C / rated value":"18.54 A","at 50 °C / rated value":"18.04 A","at 55 °C / rated value":"17.5 A","at 60 °C / rated value":"16.96 A","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"3","Tripping Characteristic Class":"D","acc. to EN 60898 / rated value":"15 kA","Position / Of Power Supply Cord":"Any","acc. to IEC 60947-2 / rated value":"25 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,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/311fbdeb3dbaf334be28417c7117e0de.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=535461&mlfb=5SY7320-8","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY7320-8/alternatives.json"},"ai":{"faq":[{"question":"What is 5SY7320-8 used for?","answer":"It is a D-curve miniature circuit breaker rated 20 A, 3-pole, designed for motor and transformer circuits where high inrush currents must be tolerated without tripping. Breaking capacity is 15 kA (EN 60898) and 25 kA (IEC 60947-2)."},{"question":"Where can I buy 5SY7320-8?","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 offer."},{"question":"What compliance documentation does Siemens provide for 5SY7320-8?","answer":"The part carries the SENTRON brand and is designed to EN 60898 and IEC 60947-2. It is halogen-free and silicon-free, and rated for pollution degree 3 and overvoltage category III. Specific RoHS/REACH/UL declarations are available on request as part of the RFQ documentation package."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY7320-8","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/5SY7320-8 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}}