{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY6320-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY6320-8","canonicalUrl":"https://aoctrl.com/siemens/5SY6320-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SY6320-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY6 series, miniature circuit breaker, 5SY6320-8, 20 A, D characteristic, 3-pole, 400 V AC, 6 kA (EN 60898) / 15 kA (IEC 60947-2), IP20, quick assembly system.","salesMarkdown":"## What it is and what it does The Siemens SENTRON 5SY6320-8 is a 3-pole miniature circuit breaker (MCB) rated 20 A with a D tripping characteristic. It protects branch circuits against overload and short-circuit in industrial control panels, distribution boards, and machinery — the D curve is specifically for loads with high inrush currents like motors, transformers, and welding equipment, where a B or C curve would nuisance-trip on startup. ## Breaking capacity — the real-world fault clearance Rated 6 kA per EN 60898 and 15 kA per IEC 60947-2 at 400 V AC. The IEC 60947-2 figure is the one that matters for industrial panel design — it tells you the breaker can safely interrupt a fault up to 15 kA without welding contacts or venting arc. For UL 1077 / CSA C22.2 No. 235 installations, the interrupting rating is 5 kA. ## Mounting and integration Snaps onto DIN rail via the quick assembly system — no tools needed. Occupies 3 width units (54 mm wide) on the rail. Mounting position is any, so it fits horizontal busbars or vertical sub-distribution boards without derating. Depth is 76 mm (70 mm installation depth), which clears most standard enclosure gland plates. IP20 with connected conductors — fine for enclosed panels, not for wet areas. ## Sourcing reality This is a current-production Siemens SENTRON part. Sourced and quoted to order against an RFQ through independent distribution — availability and current pricing confirmed at quote time. No last-time-buy window, no broker scramble.","metaTitle":"Siemens SENTRON 5SY6320-8 MCB, 20 A, D Curve, 3-Pole","metaDescription":"Siemens SENTRON 5SY6320-8 miniature circuit breaker, 20 A, D tripping characteristic, 3-pole, 400 V AC, 6 kA (EN 60898) / 15 kA (IEC 60947-2). Current lifecycle. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Depth":"76 mm","Width":"54 mm","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Rated Value":"50/60 Hz","Mounting type":"Quick assembly system","Number Of Poles":"3","Type Of Voltage":"AC","lifecycle_stage":"current","Mounting Position":"any","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree of pollution":"3","Product designation":"Miniature circuit breaker","Protection class IP":"IP20, with connected conductors","at AC / rated value":"400 V","Overvoltage Category":"III","Combined Terminal Top":"Yes","Number Of Width Units":"3","Number of poles / Note":"3P","Combined Terminal Bottom":"Yes","circuit-breaker / Design":"5SY6","Suitability for operation":"Mechanical engineering / industry","Product feature / sealable":"Yes","Tripping characteristic class":"D","at DC / rated value / maximum":"72 V","Product Feature / Halogen-Free":"Yes","Product Feature / Silicon-Free":"Yes","acc. to EN 60898 / rated value":"6 kA","Position / of power supply cord":"Any","acc. to IEC 60947-2 / rated value":"15 kA","Product feature / Touch protection":"Yes","Operating current / at AC / rated value":"20 A","Reference code / acc. to DIN EN 81346-2":"F","reference code / acc. to DIN EN 61346-2":"F","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","Product function / neutral conductor switching":"No","with multi-phase operation / at AC / rated value":"440 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":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=318271&mlfb=5SY6320-8","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY6320-8/alternatives.json"},"ai":{"faq":[{"question":"What is the 5SY6320-8 used for?","answer":"It's a miniature circuit breaker for branch-circuit protection in industrial panels, particularly for loads with high inrush current (motors, transformers) where a D tripping characteristic prevents nuisance trips."},{"question":"What is the breaking capacity of the 5SY6320-8?","answer":"6 kA per EN 60898 and 15 kA per IEC 60947-2 at 400 V AC; 5 kA per UL 1077 / CSA C22.2 No. 235."},{"question":"Where can I buy the 5SY6320-8?","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 does Siemens provide for this breaker?","answer":"The part carries approvals per EN 60898, IEC 60947-2, UL 1077, and CSA C22.2 No. 235. It is halogen-free and silicon-free."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY6320-8","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/5SY6320-8 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}}