{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY7263-8MA","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY7263-8MA","canonicalUrl":"https://aoctrl.com/siemens/5SY7263-8MA","factsUrl":"https://aoctrl.com/api/mcp/products/5SY7263-8MA","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY7263-8MA, miniature circuit breaker, D characteristic, 63 A, 2-pole, 15 kA breaking capacity per IEC 60947-2, 440 V AC, 3 MW units.","salesMarkdown":"The Siemens 5SY7263-8MA is a 2-pole miniature circuit breaker from the SENTRON family, rated 63 A with a D tripping characteristic and a 15 kA breaking capacity per IEC 60947-2. The 15 kA SCCR at 440 V AC (single- or multi-phase) tells you it can interrupt a hard fault on a 400 V industrial bus without the arc jumping upstream. It's a magnetic-only design — no thermal bimetal, so it's strictly for short-circuit protection; overload protection must come from a separate device upstream. Rated 63 A at 440 V AC, 2-pole, with a D characteristic. The 72 V DC maximum operating voltage means it's usable on some DC control circuits, but the primary application is AC motor branch circuits. IP20 with conductors connected — that's the standard for enclosed distribution boards; the sealable option (padlockable handle) lets you lock it off for LOTO. ## What compliance documentation comes with it The design complies with EN 61346-2 and IEC 81346-2 function designation F (protective device). Vibration resistance per IEC 60068-2-6 is ±1 mm at 5–25 Hz and 50 m/s² at 25–150 Hz, so it holds up on a machine base or in a mobile substation. The ambient influence data (max 95% RH to 55 °C, derating to 35% RH at 75 °C) tells you the breaker stays within spec in a hot, humid panel — but the D curve's thermal response is minimal since it's magnetic-only.","metaTitle":"Siemens 5SY7263-8MA SENTRON MCB, D Curve, 63 A, 2-Pole, 15 k","metaDescription":"Siemens 5SY7263-8MA SENTRON miniature circuit breaker, D tripping characteristic, 63 A rated current, 2-pole, 15 kA breaking capacity per IEC 60947-2. Active production, sourced to","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["2-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"36 mm","title":"5SY7263-8MA","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Standard":"IEC / EN 60947-2","description":"Miniature circuit breakers 400v Icu 15kA 2 pole, 63 A, only magnetic","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"2P","Number Of Poles":"2","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","at AC / rated value":"63 A","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","Design Of The Product":"Only magnetic tripping operation","according to EN 61346-2":"F","Combined Terminal Bottom":"Yes","according to IEC 81346-2":"F","Suitability For Operation":"Industry","Neutral Conductor Switching":"No","Number Of Modular Width Units":"3","Tripping Characteristic Class":"D","Position / Of Power Supply Cord":"Any","according to IEC 60947-2 / rated value":"15 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","Value Range / Of The Supply Voltage Frequency":"50/60 Hz","with multi-phase operation / at AC / rated value":"440 V","operating voltage / at DC / rated value / maximum":"72 V","vibration resistance / according to IEC 60068-2-6":"±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz","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,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/ff5309986fb005028a860ea37047dcff.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=696503&mlfb=5SY7263-8MA"},"ai":{"faq":[{"question":"What is the 5SY7263-8MA used for?","answer":"It's a 2-pole D-curve miniature circuit breaker rated 63 A with 15 kA breaking capacity per IEC 60947-2, used for short-circuit protection of motor branches, transformers, and high-inrush loads on 400 V AC industrial panels."},{"question":"Where can I buy the 5SY7263-8MA and how is it quoted?","answer":"We source the 5SY7263-8MA through independent distribution and quote it to order against an RFQ. Availability and current pricing are confirmed at quote time — submit an RFQ for your volume and delivery requirements."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY7263-8MA","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/5SY7263-8MA 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}}