{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY7320-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY7320-7","canonicalUrl":"https://aoctrl.com/siemens/5SY7320-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SY7320-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY7320-7, 3-pole miniature circuit breaker, C-curve, 20 A rated current, 15 kA (EN 60898) / 25 kA (IEC 60947-2) breaking capacity, IP20, 3 MW units.","salesMarkdown":"## MCB for panel builders: 5SY7320-7 in the SENTRON line Breaking capacity is 15 kA per EN 60898 and 25 kA per IEC 60947-2, with a DC breaking capacity of 15 kA per IEC 60947-2. For a 20 A circuit, that means magnetic trip between 100 A and 200 A. ## Thermal derating and ambient limits Rated current holds at 20 A up to 35 °C ambient. Above that, derate linearly: 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. This matters for sealed enclosures or high-ambient panels — a 20 A breaker in a 50 °C cabinet is effectively an 18 A device. The derating curve is published, so panel builders can size upstream protection accordingly. Depth is 76 mm, width 54 mm (3 MW), height 90 mm. Installation depth is 70 mm. Halogen-free and silicon-free construction, sealable for tamper-proofing. Energy limitation class 3. Touch protection is integrated on the terminals.","metaTitle":"Siemens 5SY7320-7 SENTRON MCB, 3P C-20A, 15/25 kA","metaDescription":"Siemens 5SY7320-7 SENTRON miniature circuit breaker, 3-pole, C-curve, 20 A rated. Breaking capacity 15 kA (EN 60898) / 25 kA (IEC 60947-2). IP20, -40 to 75 °C. Current lifecycle st","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","Energy Limitation Class":"3","at 35 °C / rated value":"20 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":"C","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/31bb7977a6da956c105a4d60b05cb9fb.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=36206&mlfb=5SY7320-7","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY7320-7/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SY7320-7?","answer":"15 kA per EN 60898 and 25 kA per IEC 60947-2 at AC. DC breaking capacity is 15 kA per IEC 60947-2."},{"question":"What is the rated current of 5SY7320-7 at elevated ambient temperatures?","answer":"20 A at 35 °C, derated to 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."},{"question":"Where can I buy the 5SY7320-7?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY7320-7","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/5SY7320-7 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}}