{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY8115-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY8115-8","canonicalUrl":"https://aoctrl.com/siemens/5SY8115-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SY8115-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY8115-8, 1-pole miniature circuit breaker, 1.6 A rated current, D tripping characteristic, 70 kA breaking capacity at AC per IEC 60947-2, 50/60 Hz.","salesMarkdown":"## What the ratings mean for fit The Siemens SENTRON 5SY8115-8 is a 1-pole miniature circuit breaker rated 1.6 A at AC with a D tripping characteristic. The D curve means it tolerates inrush currents 10–20 times the rated current before tripping magnetically — sized for motor and transformer branch circuits where the start-up surge would nuisance-trip a B or C curve. The 70 kA breaking capacity at AC per IEC 60947-2 tells you it can safely interrupt fault currents up to that level without upstream damage; that SCCR headroom makes it a fit for high-fault panels close to the transformer. At DC per IEC 60947-2 the rated breaking capacity is 15 kA, and under UL 1077 and CSA C22.2 No.235 it carries a 5 kA rating — so the part is recognized across IEC and North American supplementary protection standards. ## Deployment context and panel integration Snaps onto DIN rail via the quick assembly system, occupies 1 modular width unit (18 mm,), and can be mounted in any position. Installation depth is 70 mm; overall depth is 76 mm. The housing is IP20 with connected conductors — standard for enclosed distribution boards, not for wet washdown. Combined terminals at top and bottom accept both busbar and wire entry. Pollution degree 3 and overvoltage category III suit it for industrial control panels where conductive dust and transient overvoltages are expected. Rated for ambient temperatures from -40 to 75 °C with derating above 45 °C — the 1.6 A rating holds at 45 °C, drops to 1.56 A at 50 °C, and 1.52 A at 55 °C (–). ## Approvals and compliance documentation The breaker carries ratings per IEC 60947-2, UL 1077 and CSA C22.2 No.235 — so compliance documentation for RoHS, REACH, UL, and IEC is available from the manufacturer. The product is halogen-free and silicon-free, which matters for clean-room or sensitive electronic environments where outgassing can contaminate contacts or optics. Touch protection is built in. The product designation per IEC 81346-2 and DIN EN 61346-2 is F — a standard functional identifier for protective devices in panel schematics.","metaTitle":"Siemens 5SY8115-8 SENTRON MCB, 1.6 A, D Curve, 70 kA","metaDescription":"Siemens SENTRON 5SY8115-8 miniature circuit breaker, 1-pole, 1.6 A, D tripping characteristic, 70 kA breaking capacity per IEC 60947-2. Sourced to order against 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":"5SY8115-8","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Circuit breaker 230/400 V D=70 mm 25 kA according to EN 60947-2, 1P, D1.6","Halogen-Free":"Yes","Silicon-Free":"Yes","Number Of Poles":"1","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","acc. to IEC 81346-2":"F","at AC / rated value":"1.6 A","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","Number Of Poles / Note":"1P","acc. to DIN EN 61346-2":"F","at 45 °C / rated value":"1.6 A","at 50 °C / rated value":"1.56 A","at 55 °C / rated value":"1.52 A","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"1","Tripping Characteristic Class":"D","Position / Of Power Supply Cord":"Any","acc. to IEC 60947-2 / rated value":"70 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 DC / acc. to IEC 60947-2 / rated value":"15 kA","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/b28cbc1c54fd7a7883e85c43589a8d26.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=431973&mlfb=5SY8115-8"},"ai":{"faq":[{"question":"Where can I buy the 5SY8115-8 and what is the lead time?","answer":"The 5SY8115-8 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 your quantity and delivery window."},{"question":"What does the D tripping characteristic mean on this breaker?","answer":"The D curve allows magnetic tripping at 10–20 times the rated current (1.6 A), so it handles high inrush from motors and transformers without nuisance tripping. The 70 kA breaking capacity at AC per IEC 60947-2 gives fault-clearing headroom in high-fault panels."},{"question":"What compliance documentation does Siemens provide for the 5SY8115-8?","answer":"The breaker carries ratings per IEC 60947-2, UL 1077, and CSA C22.2 No.235. RoHS, REACH, and UL documentation are available from the manufacturer. The housing is halogen-free and silicon-free."},{"question":"Will the 5SY8115-8 drop into a panel specified around the 5SY7140-8CC?","answer":"Both are 1-pole SENTRON MCBs in the 5SY series, sharing the same 18 mm width (1 modular unit) and DIN-rail mounting. The 5SY8115-8 is a 1.6 A D-curve breaker; the 5SY7140-8CC is a different rating and curve. They are mechanically interchangeable in the same panel footprint, but verify the branch circuit's required current rating and tripping characteristic before substitution."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY8115-8","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/5SY8115-8 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}}