{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU1674-7CK81","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU1674-7CK81","canonicalUrl":"https://aoctrl.com/siemens/5SU1674-7CK81","factsUrl":"https://aoctrl.com/api/mcp/products/5SU1674-7CK81","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SU1 RCBO, Super Resistant K design, 4-pole, C characteristic, 100 A at 30 °C, 10 kA per EN 60898, 277/480 V AC, 11 MW, IP20.","salesMarkdown":"The Siemens 5SU1674-7CK81 is a 4-pole RCBO (residual current operated circuit breaker with integral overcurrent protection) from the SENTRON 5SU1 series, Super Resistant K design. It combines overcurrent protection (C characteristic) with Type B residual current detection in a single 11-module-wide unit for 277/480 V AC networks at 50/60 Hz. The headline 100 A rating holds only at 30 °C ambient. At 40 °C it derates to 92.5 A, at 45 °C to 89 A, at 50 °C to 85 A, at 55 °C to 81 A, and at 60 °C to 77 A. ## Breaking capacity and standards ## Physical fit and mounting Width is 198 mm (11 width units at 18 mm per unit), depth 77 mm, installation depth 70 mm, height 90 mm. Supply can enter from top or bottom.","metaTitle":"Siemens 5SU1674-7CK81 SENTRON RCBO, 4P, C-Char, 100A, 10kA","metaDescription":"Siemens 5SU1674-7CK81 SENTRON RCBO, 4-pole, C characteristic, 100 A at 30 °C, 10 kA breaking capacity per EN 60898 and IEC 60947-2. 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","at 30 Cel":"100 A","at 40 Cel":"92.5 A","at 45 Cel":"89 A","at 50 Cel":"85 A","at 55 Cel":"81 A","at 60 Cel":"77 A","Halogen-Free":"Yes","Silicon-Free":"Yes","Number Of Poles":"4","Type Of Voltage":"AC","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","at AC / rated value":"277/480 V","protection class IP":"IP20, if the distribution board is installed, with connected conductors","Overvoltage Category":"III","Design Of The Product":"Super resistant K","Energy Limiting Class":"3","Number Of Width Units":"11","Type Of Fault Current":"B","Number Of Poles / Note":"4P","acc. to DIN EN 61346-2":"F","acc. to DIN EN 81346-2":"F","circuit-breaker / Design":"5SU1","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","Supply Voltage Frequency / Rated Value":"50 Hz","Tripping Residual Current / Rated Value":"300 mA","operating current / at AC / rated value":"100 A","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 (Switching Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/d57c39240cd5b1a31f0b65f51da36a62.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=326317&mlfb=5SU1674-7CK81","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SU1674-7CK81/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SU1674-7CK81?","answer":"10 kA per both EN 60898 and IEC 60947-2 at 277/480 V AC."},{"question":"What is the difference between 5SU1674-7CK81 and 5SY4310-7CV?","answer":"The 5SU1674-7CK81 is a 4-pole RCBO with Type B residual current protection; the 5SY4310-7CV is a 4-pole MCB only (no residual current element). They share the same 10 kA breaking capacity and C characteristic, but the 5SU1 adds RCD functionality in the same footprint. A panel wired for the 5SY will need additional space or a separate RCD if you swap to the 5SU1."},{"question":"Where can I buy 5SU1674-7CK81?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SU1674-7CK81","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/5SU1674-7CK81 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}}