{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU1374-8DK81","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU1374-8DK81","canonicalUrl":"https://aoctrl.com/siemens/5SU1374-8DK81","factsUrl":"https://aoctrl.com/api/mcp/products/5SU1374-8DK81","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SU1374-8DK81, RCBO, 4-pole, Type B+ residual current 30 mA, D tripping characteristic, 100 A at 30 °C, 10 kA breaking capacity.","salesMarkdown":"The Siemens 5SU1374-8DK81 is a 4-pole RCBO from the SENTRON series, combining overcurrent protection with residual current detection in a single modular device. It carries a Type B+ residual current sensitivity of 30 mA and a D tripping characteristic for the overcurrent element, rated at 100 A at 30 °C ambient. The 100 A rating holds at 30 °C; at 40 °C it derates to 92.5 A, at 50 °C to 85 A, and at 60 °C to 77 A. ## Residual current type and application Type B+ residual current protection detects AC, pulsating DC, smooth DC, and high-frequency AC fault currents up to 1 kHz. This makes it suitable for circuits with variable-speed drives, UPS systems, EV chargers, and other equipment that can generate mixed-frequency or DC residual currents. The D tripping characteristic handles high inrush loads like motors and transformers without nuisance tripping.","metaTitle":"Siemens 5SU1374-8DK81 SENTRON RCBO, Type B+ 30mA, D-Curve 10","metaDescription":"Siemens 5SU1374-8DK81 SENTRON RCBO, 4-pole, Type B+ residual current 30mA, D tripping characteristic, 100A rated at 30°C, 10kA breaking capacity. Current production. Sourced to ord","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":"2 084 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":"195 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":"30 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":"https://cdn.aoctrl.com/d3e056d146e1c47c230067c0529b3047.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=202273&mlfb=5SU1374-8DK81","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SU1374-8DK81/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SU1374-8DK81?","answer":"10 kA rated value per both EN 60898 and IEC 60947-2."},{"question":"Where can I buy 5SU1374-8DK81?","answer":"Sourced and quoted to order against an RFQ through independent distribution; availability and current pricing confirmed at quote time."},{"question":"What compliance documentation is available for 5SU1374-8DK81?","answer":"The device is halogen-free and silicon-free. Standard Siemens SENTRON documentation includes CE declaration, RoHS, and REACH compliance data available on request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SU1374-8DK81","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/5SU1374-8DK81 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}}