{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY8601-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY8601-8","canonicalUrl":"https://aoctrl.com/siemens/5SY8601-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SY8601-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY8601-8 miniature circuit breaker, 4-pole (3P+N), D tripping characteristic, 1 A rated current, 70 kA breaking capacity at AC per IEC 60947-2, IP20 with connected conductors.","salesMarkdown":"It breaks up to 70 kA at AC per IEC 60947-2 and 15 kA at DC per the same standard, with a UL 1077 / CSA C22.2 No. 235 interrupting rating of 5 kA. ## D-curve and selectivity The D tripping characteristic means this breaker holds through inrush up to 10–20× rated current before tripping magnetically. That suits loads with high starting surges — small transformers, solenoid banks, motor starters with contactor coils. For a 1 A rated device, expect the magnetic trip to pick up around 10–20 A instantaneous. Neutral conductor switching is built in (3P+N), so the neutral pole opens and closes with the phases. That matters for TN-S or TN-C-S systems where you want the neutral isolated during maintenance. The breaker is sealable, which lets a panel builder or inspector lock the toggle position after commissioning. The 72 mm width corresponds to 4 modular units (18 mm per pole). Mounting position any, so you can orient it vertically or horizontally in a shallow enclosure. Rated for ambient temperatures from -40 °C to 75 °C, with derating above 45 °C: at 50 °C it carries 0.98 A, at 55 °C it carries 0.95 A.","metaTitle":"Siemens 5SY8601-8 SENTRON MCB, 4P, D-curve, 1 A, 70 kA","metaDescription":"Siemens 5SY8601-8 SENTRON miniature circuit breaker, 4-pole (3P+N), D tripping characteristic, 1 A rated, 70 kA breaking capacity at AC per IEC 60947-2. Active production, sourced","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["4-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"72 mm","title":"5SY8601-8","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+N, D1","Halogen-Free":"Yes","Silicon-Free":"Yes","Number Of Poles":"4","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 A","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","Number Of Poles / Note":"3P+N","acc. to DIN EN 61346-2":"F","at 45 °C / rated value":"1 A","at 50 °C / rated value":"0.98 A","at 55 °C / rated value":"0.95 A","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"4","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":"Yes","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/ef688ade1ae38006dcc8842155f0cd5f.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=404261&mlfb=5SY8601-8"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SY8601-8?","answer":"70 kA at AC per IEC 60947-2, 15 kA at DC per IEC 60947-2, and 5 kA per UL 1077 and CSA C22.2 No. 235. The 70 kA AC rating is the headline figure for industrial high-fault applications."},{"question":"What is the tripping characteristic of 5SY8601-8?","answer":"D-curve — magnetic trip typically between 10× and 20× rated current (10–20 A for this 1 A breaker). Designed for loads with high inrush, such as small transformers and solenoid banks."},{"question":"Where can I buy 5SY8601-8?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing confirmed at quote time — no stock count or lead-time number published here."},{"question":"What compliance documentation does Siemens provide for 5SY8601-8?","answer":"The breaker carries IEC 60947-2 and UL 1077 / CSA C22.2 No. 235 approvals. The housing is halogen-free and silicon-free. Standard Siemens declarations (CE, UKCA, RoHS, REACH) are available per the SENTRON series documentation."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY8601-8","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/5SY8601-8 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}}