{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU1844-6WK82","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU1844-6WK82","canonicalUrl":"https://aoctrl.com/siemens/5SU1844-6WK82","factsUrl":"https://aoctrl.com/api/mcp/products/5SU1844-6WK82","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON selective RCBO, 4-pole, 125 A (30 °C), 10 kA, Type A, 1000 mA, B-curve, 11 MW, IP20.","salesMarkdown":"## Selective 4-pole RCBO for main feeder protection The Siemens 5SU1844-6WK82 is a SENTRON selective RCBO rated 125 A at 30 °C, with a 10 kA breaking capacity per EN 60898 and IEC 60947-2. The 4-pole, Type A residual-current unit trips at 1000 mA, and the B-curve overcurrent characteristic handles moderate inrush from resistive and light motor loads. The selective design (time-delayed) means it coordinates with downstream 30 mA or 300 mA RCDs, so only the faulted branch drops out — the main feeder stays live. Panel builders mount this in the distribution board; the 11 modular-width (198 mm) footprint fits standard DIN-rail enclosures. ## Rated current derating across temperature At 40 °C the continuous current drops to 115.62 A, at 50 °C to 106.25 A, and at 60 °C to 96.25 A. For a panel that runs warm — say a 50 °C internal ambient — size the upstream cable and busbar for 106 A, not the nameplate 125. Dimensions: 198 mm wide (11 modular units), 90 mm tall, 77 mm deep, with a 70 mm installation depth into the enclosure. The supply can enter from either top or bottom, and the mounting position is unrestricted.","metaTitle":"Siemens 5SU1844-6WK82 SENTRON RCBO, 4P, 125A, 10kA, Type A","metaDescription":"Siemens SENTRON 5SU1844-6WK82 selective RCBO, 4-pole, 125 A rated at 30 °C, 10 kA breaking capacity, Type A residual current, 1000 mA trip. 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":"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":"A","acc. to DIN EN 61346-2":"F","Energy Limitation Class":"3","Weight / With Packaging":"2 011 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":"B","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":"1 000 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":"5 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/cc577e4454c5cc3588193c0b80b2d06c.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=427390&mlfb=5SU1844-6WK82","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SU1844-6WK82/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 5SU1844-6WK82?","answer":"This part is sourced and quoted to order through independent distribution. Submit an RFQ for current availability and pricing — stock and lead time are confirmed at quote time."},{"question":"What is the closest functional second-source to 5SU1844-6WK82?","answer":"The Siemens 5SL6550-7BB is a 4-pole RCBO with similar breaking capacity, but it is non-selective (instantaneous trip) and typically has a different residual-current rating. The 5SU1844-6WK82's selective time-delay is designed for main feeder coordination — the 5SL series is for sub-feed or branch protection. They are not drop-in replacements without reviewing the coordination study."},{"question":"What compliance documentation does Siemens provide for 5SU1844-6WK82?","answer":"The part carries ratings per EN 60898 and IEC 60947-2, and is designated as halogen-free and silicon-free. The manufacturer provides standard declaration of conformity and product documentation; specific RoHS/REACH certificates are available from the supplier upon request."},{"question":"Will 5SU1844-6WK82 drop into a panel specified around 5SL6550-7BB without rewiring?","answer":"Not without checking the coordination study. Both are 4-pole, 11-module-wide RCBOs that mount on the same DIN rail, but the 5SU1844-6WK82 is selective (time-delayed) with a 1000 mA trip, while the 5SL6550-7BB is non-selective with a different trip rating. The physical footprint matches, but the protection scheme changes."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SU1844-6WK82","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/5SU1844-6WK82 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}}