{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4163-6","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4163-6","canonicalUrl":"https://aoctrl.com/siemens/5SY4163-6","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4163-6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY4163-6, B-curve miniature circuit breaker, 1-pole, 63 A, 10 kA per EN 60898, 15 kA per IEC 60947-2.","salesMarkdown":"The Siemens 5SY4163-6 is a SENTRON miniature circuit breaker rated 63 A at AC with a B-curve trip characteristic. That B-curve means it trips between 3 and 5 times rated current — standard for protecting resistive and general-purpose loads where you want fast clearing on moderate overloads but no nuisance trips from inrush. One pole, 18 mm wide, so it fits a single modular slot in any DIN-rail distribution board. Breaking capacity is 10 kA per EN 60898 and 15 kA per IEC 60947-2 at 230/400 V AC. The IEC 60947-2 rating is the one that matters for industrial panel designs — it certifies the breaker can clear a 15 kA prospective fault without welding or arcing over. Pollution degree 3 and overvoltage category III mean it's rated for fixed installations inside a control cabinet, not just residential load centers. ## Thermal derating — what the 63 A actually delivers The 63 A rating holds at 35 °C ambient. At 40 °C it derates to 59.16 A, at 50 °C to 55.06 A, and at 60 °C to 50.65 A. If your panel internal temperature runs 50 °C — common in a sealed enclosure with other heat sources — you're limited to 55 A continuous. Plan the load accordingly; the B-curve won't save you from a thermal trip on a borderline circuit. ## Mounting and physical fit 18 mm wide (one modular unit), 90 mm tall, 76 mm deep. Fastens via the quick-assembly system — snaps onto DIN rail, no tools needed. Installation depth is 70 mm. ## Environmental and compliance Halogen-free and silicon-free construction — important for installations where outgassing can corrode contacts or optics. Ambient temperature range -40 °C to 75 °C, with humidity limits: 95% RH up to 55 °C, tapering to 35% at 75 °C. IP20 with connected conductors, so it's protected against finger contact but not washdown. Touch protection is built in (fingers won't reach live parts when installed in a standard distribution board).","metaTitle":"Siemens 5SY4163-6 SENTRON MCB, B-Curve 63 A 1P, 10 kA","metaDescription":"Siemens 5SY4163-6 SENTRON miniature circuit breaker, B-curve, 63 A, 1-pole, 10 kA (EN 60898) / 15 kA (IEC 60947-2). Active production. Sourced to order via RFQ.","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","title":"5SY4163-6","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 230/400 V 10kA, 1-pole, B, 63A, D=70 mm","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","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":"63 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":"63 A","at 40 °C / rated value":"59.16 A","at 45 °C / rated value":"57.14 A","at 50 °C / rated value":"55.06 A","at 55 °C / rated value":"52.92 A","at 60 °C / rated value":"50.65 A","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"1","Tripping Characteristic Class":"B","acc. to EN 60898 / rated value":"10 kA","Position / Of Power Supply Cord":"Any","acc. to IEC 60947-2 / rated value":"15 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":"$107.85","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/32a27c6ebed2dc5faecd20562ba69eb1.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=219469&mlfb=5SY4163-6"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4163-6","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/5SY4163-6 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}}