{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU1674-8DK81","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU1674-8DK81","canonicalUrl":"https://aoctrl.com/siemens/5SU1674-8DK81","factsUrl":"https://aoctrl.com/api/mcp/products/5SU1674-8DK81","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SU1674-8DK81, RCBO, 4-pole, 100 A, D-characteristic, Type B+ residual current 300 mA, 10 kA breaking capacity, super resistant K design.","salesMarkdown":"The Type B+ RCD detects AC, pulsating DC, smooth DC, and high-frequency residual currents, making it suitable for variable-speed drives, UPS systems, and EV charging infrastructure where fault currents may not be sinusoidal. ## Thermal derating and installation constraints The 100 A rating holds at 30 °C ambient; at 40 °C it derates to 92.5 A, at 50 °C to 85 A, and at 60 °C to 77 A. In a sealed, uncooled enclosure — typical for a machine-tool panel or a solar combiner box — the installer must use the 40 °C or 50 °C column for conductor sizing and load scheduling. The unit occupies 11 modular width units (198 mm) on a DIN rail, with a 77 mm depth and 70 mm installation depth, so it fits standard 125 mm deep enclosures but requires 11 slots of rail space — plan the gland plate and busbar routing accordingly. Supply cord entry can be from top or bottom, which helps when the panel is pre-wired with fixed busbars. IP20 protection applies only when the distribution board is installed with connected conductors; the device itself is not rated for exposed wiring compartments. ## Construction and compliance details Touch protection is integrated on the terminals.","metaTitle":"Siemens 5SU1674-8DK81 SENTRON RCBO, 100 A, 4P, D-curve, B+ R","metaDescription":"Siemens 5SU1674-8DK81 SENTRON RCBO, 4-pole, 100 A rated, D tripping characteristic, Type B+ residual current 300 mA, 10 kA breaking capacity. Current production. Quoted 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":"100 A","protection class IP":"IP20, if the distribution board is installed, with connected conductors","Overvoltage Category":"III","Design Of The Product":"Super resistant K","Residual Current Type":"B+","acc. to DIN EN 61346-2":"F","Energy Limitation Class":"3","Weight / With Packaging":"2 082 g","at 30 °C / rated value":"100 A","at 40 °C / rated value":"92.5 A","at 45 °C / rated value":"89 A","at 50 °C / rated value":"85 A","at 55 °C / rated value":"81 A","at 60 °C / rated value":"77 A","Number Of Modular Width Units":"11","Tripping Characteristic Class":"D","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","insulation voltage (Ui) / rated value":"440 V","Supply Voltage Frequency / Rated Value":"50 Hz","Surge Voltage Resistance / Rated Value":"4 000 V","Influence Of The Surrounding Temperature":"Max. 95% humidity","Surge Current Resistance / At (8/20) μS":"3 kA","Type Of Voltage / Of The Operating Voltage":"AC","Product Component / Neutral Conductor Switching":"Yes","Mechanical Service Life (Switching Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/fae68abba337ff279be989b2766287e4.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=158259&mlfb=5SU1674-8DK81","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SU1674-8DK81/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 5SU1674-8DK81 and how do I get a price?","answer":"This RCBO is sourced through independent distribution and quoted to order against an RFQ. Submit a request for availability and current pricing — the quote will reflect the real-time market position."},{"question":"What is 5SU1674-8DK81's listed depth and width?","answer":"The depth is 77 mm (installation depth 70 mm) and the width is 198 mm, which corresponds to 11 modular width units on a DIN rail."},{"question":"What compliance documentation does Siemens provide for 5SU1674-8DK81?","answer":"The device is halogen-free and silicon-free, rated per EN 60898 and IEC 60947-2 for breaking capacity, and carries overvoltage category III with pollution degree 2. Standard Siemens declarations for RoHS and REACH are available on request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SU1674-8DK81","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/5SU1674-8DK81 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}}