{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4315-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4315-8","canonicalUrl":"https://aoctrl.com/siemens/5SY4315-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4315-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY4315-8 3-pole miniature circuit breaker, D tripping characteristic, 1.6 A rated current, 10 kA / 35 kA breaking capacity, 54 mm width, 76 mm depth.","salesMarkdown":"## What the D curve and 1.6 A rating mean for your panel The 5SY4315-8 is a 3-pole miniature circuit breaker from Siemens' SENTRON family, designed for DIN-rail mounting in distribution boards and control panels. Its D tripping characteristic means it handles inrush currents 10–20× rated current before the magnetic trip operates — the right choice for motor circuits, transformers, or solenoid loads that draw a heavy start-up surge without nuisance tripping. At 1.6 A rated current (AC, per IEC 60898), this breaker protects branch circuits feeding small motors, contactor coils, or control transformers. The rated current derates with ambient temperature: 1.54 A at 40 °C, 1.5 A at 45 °C, 1.47 A at 50 °C, 1.44 A at 55 °C, and 1.4 A at 60 °C — if the panel runs hot, the actual continuous load must stay below the derated figure. ## Breaking capacity — selectivity headroom in a fault Rated breaking capacity is 10 kA per IEC 60898 and 35 kA per IEC 60947-2. The 35 kA figure under the industrial standard means this breaker can safely clear a fault up to that level in an industrial panel where the prospective short-circuit current is higher than a residential installation. For DC circuits (per IEC 60947-2), the breaking capacity is 15 kA. Overvoltage category III and pollution degree 3 suit it for fixed installations downstream of the main distribution board — the typical environment in a machine control cabinet or sub-distribution panel. ## Physical fit and mounting details Occupies 3 modular width units (54 mm total width) on a DIN rail. Depth is 76 mm, height 90 mm, installation depth 70 mm. The quick-assembly fastening method means it snaps onto the rail without tools and can be mounted in any position. IP20 protection (with connected conductors) is standard for indoor panel use. The combined terminal at both top and bottom accepts the supply cable from either end — no need to orient the breaker a specific way.","metaTitle":"Siemens 5SY4315-8 3-Pole MCB, D Characteristic, 1.6 A","metaDescription":"Siemens SENTRON 5SY4315-8 3-pole MCB, D tripping curve, 1.6 A rated current. Breaking capacity 10 kA (IEC 60898) / 35 kA (IEC 60947-2). Width 54 mm, depth 76","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["3-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"54 mm","title":"5SY4315-8","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 400 V 10kA, 3-pole, D, 1.6A, D=70 mm","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"3P","Number Of Poles":"3","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","acc. to DIN EN 61346-2":"F","at 35 °C / rated value":"1.6 A","at 40 °C / rated value":"1.54 A","at 45 °C / rated value":"1.5 A","at 50 °C / rated value":"1.47 A","at 55 °C / rated value":"1.44 A","at 60 °C / rated value":"1.4 A","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"3","Tripping Characteristic Class":"D","acc. to EN 60898 / rated value":"10 kA","Position / Of Power Supply Cord":"Any","acc. to IEC 60947-2 / rated value":"35 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":"$235.97","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/7f1ec2aa22832fe84b9c5259e4c86590.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=359104&mlfb=5SY4315-8"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 5SY4315-8?","answer":"Submit an RFQ through this listing. The part is sourced to order from authorized distribution channels; pricing and lead time are confirmed against your specific BOM quantity at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4315-8","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/5SY4315-8 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}}