{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY8315-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY8315-7","canonicalUrl":"https://aoctrl.com/siemens/5SY8315-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SY8315-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON miniature circuit breaker, 3-pole, C-curve, 70 kA at 400 V AC, 50/60 Hz, 3 MW units, IP20, order code 5SY8315-7.","salesMarkdown":"The Siemens 5SY8315-7 is a SENTRON miniature circuit breaker (MCB) — a 3-pole unit with C-curve tripping characteristic, rated 400 V AC at 50/60 Hz. That puts it in the high-breaking-capacity class for industrial panelboards and distribution boards where fault levels are high. The C-curve (trips at 5–10× rated current) suits it for motor circuits, transformers, and lighting loads with moderate inrush — typical for mechanical engineering and industrial applications. Rated current is 1.6 A at 45 °C, derating to 1.53 A at 55 °C and 1.57 A at 50 °C, so ambient temperature in the enclosure matters for sizing. The 70 kA rating at 400 V AC (IEC 60947-2) is the headline figure — it allows this MCB to be used as the main incoming device in sub-distribution boards with high fault current. For DC circuits, it's rated 15 kA per IEC 60947-2. Under UL 1077 and CSA C22.2 No. 235, the breaking capacity is 5 kA. Selectivity with upstream devices is achievable given the high interrupting rating; coordination tables from Siemens should be consulted for specific series combinations. ## Physical integration Installation depth 70 mm. Sealable — suitable for applications requiring tamper-proof covers. Halogen-free and silicon-free construction.","metaTitle":"Siemens 5SY8315-7 SENTRON MCB, 3-Pole C-Curve, 70 kA, 400 V","metaDescription":"Siemens 5SY8315-7 SENTRON miniature circuit breaker, 3-pole, C-curve, 70 kA breaking capacity at 400 V AC, 50/60 Hz. Active production, sourced to order. Request quote.","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":"5SY8315-7","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 400 V D=70 mm 25 kA according to EN 60947-2, 3P, C1.6","Halogen-Free":"Yes","Silicon-Free":"Yes","Number Of Poles":"3","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":"400 V","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","Number Of Poles / Note":"3P","acc. to DIN EN 61346-2":"F","at 45 °C / rated value":"1.6 A","at 50 °C / rated value":"1.57 A","at 55 °C / rated value":"1.53 A","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"3","Tripping Characteristic Class":"C","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 (Switching Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/502ec8c5110087f5bfedd1bf3dd01615.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=425944&mlfb=5SY8315-7"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SY8315-7 at 400 V AC?","answer":"70 kA per IEC 60947-2 at 400 V AC, 50/60 Hz. For DC circuits it is 15 kA, and under UL/CSA it is 5 kA."},{"question":"Where can I buy 5SY8315-7 and how is it quoted?","answer":"The 5SY8315-7 is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"Will 5SY8315-7 drop into a panel specified around 5SY4304-7CV?","answer":"No — the 5SY8315-7 is a 3-pole MCB, while the 5SY4304-7CV is 4-pole. Panel wiring and busbar layout would need to change. They are not drop-in interchangeable."},{"question":"What compliance documentation does Siemens provide for 5SY8315-7?","answer":"The MCB carries IEC 60947-2, UL 1077, and CSA C22.2 No. 235 certifications. It is halogen-free and silicon-free. Specific RoHS/REACH declarations are available from Siemens documentation."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY8315-7","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/5SY8315-7 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}}