{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU1674-7EK82","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU1674-7EK82","canonicalUrl":"https://aoctrl.com/siemens/5SU1674-7EK82","factsUrl":"https://aoctrl.com/api/mcp/products/5SU1674-7EK82","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON RCBO, selective, 4-pole, 125 A, Type B+, 300 mA residual, 10 kA, 5SU1674-7EK82.","salesMarkdown":"## What the ratings mean for fit The 198 mm width and 77 mm depth tell you this is an 11-module-wide unit — that's a full-size device, not a slim 2-module RCBO. It needs a distribution board with enough spare ways, or you're rearranging the row. Mounting position is any, and the supply can enter from either top or bottom — that flexibility saves a headache when you're retrofitting into an existing panel where the busbar arrangement is already set. IP20 with the distribution board installed and conductors connected — that's protected against finger contact but not against dust or moisture. Keep it inside a closed panel, not out in the washdown zone. The thermal derating curve is published: 125 A at 30 °C, 115.62 A at 40 °C, 111.25 A at 45 °C, 106.25 A at 50 °C, 101.25 A at 55 °C, and 96.25 A at 60 °C (-). If your panel ambient runs hot — say 50 °C inside the enclosure — you're sizing for 106 A continuous, not 125 A. That's the number that decides whether your 100 A motor feeder holds or trips on a hot afternoon. Class C tripping characteristic means the magnetic trip operates at 5 to 10 times the rated current — a good fit for motor-starting inrush or transformer energization, where a Class B would nuisance-trip and a Class D might not clear a bolted fault fast enough. Overvoltage category III and pollution degree 2 — that's the standard for fixed-installation distribution boards in industrial and commercial buildings. Not for outdoor pole-top mounting, but fine inside the plant's main switchboard.","metaTitle":"Siemens 5SU1674-7EK82 SENTRON RCBO, 125A, Type B+, 300mA","metaDescription":"Siemens 5SU1674-7EK82 SENTRON selective RCBO, 4-pole, 125 A rated, Type B+ residual current, 300 mA trip, 10 kA breaking capacity. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Residual Current Breakers (RCCB/RCBO)"],"specifications":{"Depth":"77 mm","Width":"198 mm","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Halogen-Free":"Yes","Silicon-Free":"Yes","Number Of Poles":"4","lifecycle_stage":"current","Mounting Position":"any","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"2","Operating Frequency":"50/60 Hz","Product Designation":"RCBO","acc. to IEC 81346-2":"F","at AC / rated value":"125 A","protection class IP":"IP20, if the distribution board is installed, with connected conductors","Overvoltage Category":"III","Design Of The Product":"selective","Residual Current Type":"B+","Number Of Poles / Note":"4P","acc. to DIN EN 61346-2":"F","Energy Limitation Class":"3","Weight / With Packaging":"2 053 g","at 30 °C / rated value":"125 A","at 40 °C / rated value":"115.62 A","at 45 °C / rated value":"111.25 A","at 50 °C / rated value":"106.25 A","at 55 °C / rated value":"101.25 A","at 60 °C / rated value":"96.25 A","Number Of Modular Width Units":"11","Tripping Characteristic Class":"C","acc. to EN 60898 / rated value":"10 kA","For Testing Equipment / Minimum":"100 V","Position / Of Power Supply Cord":"Either top or bottom","Number Of Poles / With Protection":"4","acc. to IEC 60947-2 / rated value":"10 kA","Product Feature / Touch Protection":"Yes","Tripping Fault Current / Rated Value":"300 mA","Supply Voltage Frequency / Rated Value":"50 Hz","Influence Of The Surrounding Temperature":"Max. 95% humidity","Surge Current Resistance / At (8/20) μS":"5 kA","Product Function / Neutral Conductor Switching":"Yes","Mechanical Service Life (Operating Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/bf107e8f3809cc25260a891e98ee6b60.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=159257&mlfb=5SU1674-7EK82","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SU1674-7EK82/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SU1674-7EK82","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/5SU1674-7EK82 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}