{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU1674-7DK81","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU1674-7DK81","canonicalUrl":"https://aoctrl.com/siemens/5SU1674-7DK81","factsUrl":"https://aoctrl.com/api/mcp/products/5SU1674-7DK81","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON RCBO, 4-pole, 100 A, 300 mA residual, Type B+, 10 kA, Class C, super resistant K design.","salesMarkdown":"It combines a 100 A thermal-magnetic overcurrent trip (Class C characteristic) with a 300 mA residual-current detection circuit rated Type B+ — meaning it catches smooth DC fault currents, AC pulsating faults, and high-frequency AC components, not just the sine-wave faults a basic Type A handles. The 100 A rating at 30 °C is the headline number, but the derating curve tells the real story for a warm panel: at 40 °C it carries 92.5 A, at 50 °C it drops to 85 A, and at 60 °C it's down to 77 A. For a 400 V three-phase system with a transformer impedance giving a prospective fault current of, say, 6 kA, this RCBO has adequate headroom. If your service entrance can deliver 18 kA, you need a current-limiting upstream breaker or a higher-rated device. Type B+ residual-current detection covers smooth DC, AC pulsating, and high-frequency components. The 300 mA threshold is common for general protection. ## Deployment context IP20 rating is standard for inside a distribution board. Connection top or bottom. Depth 77 mm, installation depth 70 mm.","metaTitle":"Siemens 5SU1674-7DK81 SENTRON RCBO, 4P, 100 A, 300 mA, Type","metaDescription":"Siemens 5SU1674-7DK81 SENTRON RCBO, 4-pole, 100 A rated, 300 mA residual, Type B+, 10 kA breaking capacity, Class C. Active 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+","Number Of Poles / Note":"4P","acc. to DIN EN 61346-2":"F","Energy Limitation Class":"3","Weight / With Packaging":"2 061 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":"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":"3 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":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=393704&mlfb=5SU1674-7DK81","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SU1674-7DK81/alternatives.json"},"ai":{"faq":[{"question":"What is the difference between 5SU1674-7DK81 and 5SL4363-7?","answer":"The 5SL4363-7 is a Siemens SENTRON MCB (miniature circuit breaker) only — no residual-current protection. The 5SU1674-7DK81 is an RCBO that combines overcurrent and residual-current (Type B+, 300 mA) in one unit. If your panel needs GFCI protection, the 5SU1674-7DK81 saves a separate RCD module and wiring."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SU1674-7DK81","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/5SU1674-7DK81 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}}