{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY8163-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY8163-8","canonicalUrl":"https://aoctrl.com/siemens/5SY8163-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SY8163-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY8163-8, miniature circuit breaker, 1-pole, D characteristic, 63 A rated, 20 kA breaking capacity at 440 V AC per IEC 60947-2, 18 mm width.","salesMarkdown":"The Siemens 5SY8163-8 is a 1-pole SENTRON miniature circuit breaker with a D tripping characteristic, rated 63 A at 45 °C and delivering a 20 kA breaking capacity at 440 V AC per IEC 60947-2. ## Panel fit and environmental tolerance Mounting position is any, so horizontal or vertical busbar arrangements are fine. Ambient range spans -40 °C to 75 °C, with derating above 45 °C: 63 A at 45 °C, 61.05 A at 50 °C, 59.03 A at 55 °C. The D characteristic (10–20× In magnetic trip) is the key differentiator here. Where a C curve (5–10× In) would nuisance-trip on a motor start or a welding transformer inrush, the D curve holds. Pair it with loads that have a high ratio of starting to running current — small motors, pumps, compressors, or industrial machinery with short-duration inrush. The 63 A rating at 45 °C covers a 3-phase motor up to roughly 30 kW at 400 V, but always confirm the full-load current against the derated value at your panel ambient. Breaking capacity is 20 kA at 440 V AC per IEC 60947-2, and 15 kA at DC up to 72 V. The DC rating (15 kA at 72 V) covers control-circuit or battery-backed loads, but note it's a single-pole break — no neutral switching.","metaTitle":"Siemens 5SY8163-8 SENTRON MCB, 63 A, D Curve, 1P, 20 kA","metaDescription":"Siemens 5SY8163-8 SENTRON miniature circuit breaker, 63 A rated, D tripping characteristic, 1-pole, 20 kA breaking capacity at 440 V AC per IEC 60947-2. Active production, sourced","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"18 mm","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"1P","Number Of Poles":"1","lifecycle_stage":"current","Fastening Method":"Quick assembly system","Mounting Position":"any","at AC rated value":"63 A","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"3","Product Designation":"Miniature circuit breaker","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","at 45 °C rated value":"63 A","at 50 °C rated value":"61.05 A","at 55 °C rated value":"59.03 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":"No","Number Of Modular Width Units":"1","Position Of Power Supply Cord":"Any","Tripping Characteristic Class":"D","according to IEC 60947-2 rated value":"20 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","at DC according to IEC 60947-2 rated value":"15 kA","Value Range Of The Supply Voltage Frequency":"50/60 Hz","operating voltage at DC rated value maximum":"72 V","with multi-phase operation at AC rated value":"440 V","with single-phase operation at AC rated value":"440 V","at AC according to UL 1077 and CSA C22.2 No.235":"5 kA","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","supply voltage with single-phase operation at AC rated value":"230 V","power loss [W] for rated value of the current at AC in hot operating state per pole":"5 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/8513c47ee6ba06eeade3c68f6b220374.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=33374&mlfb=5SY8163-8","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY8163-8/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy the 5SY8163-8 and get a price?","answer":"The 5SY8163-8 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 price and lead time."},{"question":"What is the 5SY8163-8's depth and width for panel planning?","answer":"The 5SY8163-8 has a depth of 76 mm (70 mm installation depth behind the panel) and a width of 18 mm (1 modular unit), fitting a standard DIN-rail slot."},{"question":"What loads is the D-curve 5SY8163-8 suited for?","answer":"The D tripping characteristic (10–20× In magnetic trip) is designed for loads with high inrush current such as motors, pumps, compressors, and transformers — it avoids nuisance tripping on starting surges that would trip a B or C curve."},{"question":"What compliance documentation does Siemens provide for the 5SY8163-8?","answer":"The 5SY8163-8 is rated per IEC 60947-2 for breaking capacity, carries an IP20 protection class with connected conductors, and is halogen-free and silicon-free. Standard Siemens declarations (RoHS, REACH, CE) apply to the SENTRON series — request specific documentation at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY8163-8","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/5SY8163-8 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}}