{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU1844-7WK82","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU1844-7WK82","canonicalUrl":"https://aoctrl.com/siemens/5SU1844-7WK82","factsUrl":"https://aoctrl.com/api/mcp/products/5SU1844-7WK82","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SU1 selective RCBO, 4-pole (3P+N), 125 A rated at 30 °C, Type A fault current, C characteristic, 10 kA breaking capacity per EN 60898 and IEC 60947-2.","salesMarkdown":"It's rated 125 A at 30 °C ambient, with a C tripping characteristic (magnetic trip at 5–10× In, typical for motor and lighting circuits with moderate inrush). The Type A fault-current detection means it catches sinusoidal AC and pulsating DC residual currents, which covers most modern electronic loads like VFDs, switched-mode supplies, and LED drivers. The 'selective' designation (S-type) means this RCBO has a deliberate short-time delay on the residual-current trip. It coordinates with downstream RCDs so that a fault on a sub-circuit trips the local device first, not this main switch. That's the difference between losing one branch and losing the whole distribution board. The headline 125 A holds only at 30 °C. At 40 °C it's 115.62 A; at 45 °C it's 111.25 A; at 50 °C it's 106.25 A; at 55 °C it's 101.25 A; at 60 °C it's 96.25 A. The 4-pole package dissipates heat from all three phases plus the neutral, so grouping several of these in a row without ventilation gaps will push the effective ambient higher. Width is 198 mm, which is 11 width units at 18 mm per module — that's a wide device, so plan for it in your rail layout. Height is 90 mm. Touch protection is built in (fingertip-safe terminals per the product feature).","metaTitle":"Siemens 5SU1844-7WK82 SENTRON RCBO, 4P 125A Type A, 10kA","metaDescription":"Siemens SENTRON 5SU1844-7WK82 selective RCBO, 4-pole 3P+N, 125A at 30°C, Type A, 10kA breaking capacity. Current lifecycle. Sourced to order against RFQ.","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":"125 A","at 40 Cel":"115.62 A","at 45 Cel":"111.25 A","at 50 Cel":"106.25 A","at 55 Cel":"101.25 A","at 60 Cel":"96.25 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":"230/400 V","protection class IP":"IP20, if the distribution board is installed, with connected conductors","Overvoltage Category":"III","Design Of The Product":"selective","Energy Limiting Class":"3","Number Of Width Units":"11","Type Of Fault Current":"A","Number Of Poles / Note":"3P+N","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":"3","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":"1 000 mA","operating current / at AC / rated value":"125 A","Influence Of The Surrounding Temperature":"Max. 95% humidity","Surge Current Resistance / At (8/20) μS":"5 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/76491396f3a3ca36dee390328c43e8d4.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=4164&mlfb=5SU1844-7WK82","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SU1844-7WK82/alternatives.json"},"ai":{"faq":[{"question":"What does 'selective' mean on this RCBO?","answer":"It has a short time delay on the residual-current trip so that downstream RCDs clear a fault first, keeping this main switch live to the rest of the board."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SU1844-7WK82","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/5SU1844-7WK82 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}}