{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY8224-8BB08","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY8224-8BB08","canonicalUrl":"https://aoctrl.com/siemens/5SY8224-8BB08","factsUrl":"https://aoctrl.com/api/mcp/products/5SY8224-8BB08","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON miniature circuit breaker, 5SY8224-8BB08, 2-pole, D characteristic, 12.5 A rated current, 25 kA breaking capacity per IEC 60947-2, magnetic-only tripping.","salesMarkdown":"The D-curve means it tolerates inrush currents up to 10–20× rated — designed for motor, transformer, and welding loads that pull a heavy start-up spike without nuisance tripping. The magnetic-only design (no thermal bimetal) makes it strictly a short-circuit protector; it does not provide overload protection, so upstream or downstream overload coordination must be handled separately. Rated breaking capacity is 25 kA per IEC 60947-2, with a secondary 5 kA rating per UL 1077 and CSA C22.2 No.235 for North American panels. Rated voltage is 440 V AC single- or multi-phase. The 12.5 A D-curve is the headline spec. D-curve breakers are common in European industrial panels for motor branch circuits, small transformers, and capacitor banks where the magnetizing inrush would trip a B or C curve. The magnetic-only mechanism (no thermal element) eliminates nuisance tripping from ambient heat in a warm cabinet — but also means you cannot rely on this breaker for overload protection; that must be handled by a separate overload relay or motor-protective breaker upstream. Vibration resistance per IEC 60068-2-6: ±1 mm at 5–25 Hz, 50 m/s² at 25–150 Hz, so it holds up on machine-mounted panels near rotating equipment. ## Integration into a panel — what to check Snap-on DIN rail mount, any position. The quick assembly system means it clips onto the rail and the comb busbar slots into the combined terminals top and bottom — no separate busbar bridge needed. Width is 2 modular units (36 mm), so it takes two 18 mm slots on the rail. Installation depth 70 mm leaves clearance inside a standard 100 mm deep enclosure. Touch protection is built into the terminals. Operating temperature range is -40 °C to +75 °C, with humidity derating: max 95% at 55 °C, down to 35% at 75 °C.","metaTitle":"Siemens 5SY8224-8BB08 SENTRON MCB, 2-pole D-curve 12.5 A, 25","metaDescription":"Siemens 5SY8224-8BB08 SENTRON miniature circuit breaker, 2-pole, D tripping characteristic, 12.5 A rated current, 25 kA breaking capacity per IEC 60947-2. Current production. Sourc","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["2-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"36 mm","title":"5SY8224-8BB08","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 400 V 25kA, 2-pole, 12.5A, D=70 mm only magnetic tripping","Halogen-Free":"Yes","Silicon-Free":"Yes","Number Of Poles":"2","Type Of Voltage":"AC","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":"12.5 A","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","Design Of The Product":"Only magnetic tripping operation","Number Of Poles / Note":"2P","acc. to DIN EN 61346-2":"F","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"2","Tripping Characteristic Class":"D","Position / Of Power Supply Cord":"Any","acc. to IEC 60947-2 / rated value":"25 kA","Product Feature / Touch Protection":"Yes","Supply Voltage Frequency / Rated Value":"50/60 Hz","Influence Of The Surrounding Temperature":"max. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C","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 Function / 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 (Operating Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/b7e1c1d30edd97f56558cf2a9c92d890.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=384919&mlfb=5SY8224-8BB08"},"ai":{"faq":[{"question":"Where can I buy 5SY8224-8BB08 and how is it quoted?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock or price figures are published here."},{"question":"What is the physical size of 5SY8224-8BB08?","answer":"Width 36 mm (2 modular units), height 90 mm, depth 76 mm, installation depth 70 mm. Fits standard DIN-rail enclosures."},{"question":"Will 5SY8224-8BB08 drop into a panel specified around 5SY7210-7CC?","answer":"Both are 2-pole SENTRON MCBs on the same DIN-rail footprint, so the mechanical fit is identical. The difference is the tripping characteristic: 5SY8224-8BB08 is D-curve (12.5 A, magnetic-only), while 5SY7210-7CC is a different rating and curve. Verify the branch circuit's inrush and overload requirements before swapping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY8224-8BB08","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/5SY8224-8BB08 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}}