{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU9304-1KK25","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU9304-1KK25","canonicalUrl":"https://aoctrl.com/siemens/5SU9304-1KK25","factsUrl":"https://aoctrl.com/api/mcp/products/5SU9304-1KK25","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SU9 series, RCBO (RCD-operated circuit breaker), 25 A, C-curve, 10 kA, 1P+N, 18 mm width, 77 mm depth.","salesMarkdown":"The Siemens 5SU9304-1KK25 is a 1P+N RCBO from the SENTRON 5SU9 series — an RCD-operated circuit breaker that combines overcurrent and residual current protection in a single 18 mm wide module. ## Thermal derating — the real-world current rating At 40 °C it derates to 23.5 A, at 45 °C to 22.75 A, at 50 °C to 21.75 A, and at 55 °C to 20.25 A. That's the number to use for your load calc, not the 25 A label. ## Panel fit and installation At 18 mm wide (1 width unit), it takes one modular slot in a distribution board. Rated IP20 with the distribution board installed and conductors connected. Halogen-free and silicon-free construction. Touch protection is provided on the terminals. The device is classified as energy limiting class 3, which means it limits let-through energy in a fault — relevant for downstream component coordination.","metaTitle":"Siemens 5SU9304-1KK25 SENTRON RCBO, 25A C-Curve, 10kA, 1P+N","metaDescription":"Siemens 5SU9304-1KK25 SENTRON RCBO, 25A rated, C-curve, 10 kA breaking capacity per EN 60898, 1P+N, 18 mm wide. Current production. Sourced 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":"18 mm","Height":"125 mm","Maximum":"75 °C","Minimum":"-40 °C","at 30 Cel":"25 A","at 40 Cel":"23.5 A","at 45 Cel":"22.75 A","at 50 Cel":"21.75 A","at 55 Cel":"20.25 A","Halogen-Free":"Yes","Silicon-Free":"Yes","Number Of Poles":"2","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":"RCD-operated circuit breaker","at AC / rated value":"230/240 V","protection class IP":"IP20, if the distribution board is installed, with connected conductors","Overvoltage Category":"III","Design Of The Product":"Instantaneous","Energy Limiting Class":"3","Number Of Width Units":"1","Type Of Fault Current":"AC","Number Of Poles / Note":"1P+N","acc. to DIN EN 61346-2":"F","acc. to DIN EN 81346-2":"F","circuit-breaker / Design":"5SU9","Tripping Characteristic Class":"C","acc. to EN 60898 / rated value":"10 kA","For Testing Equipment / Minimum":"115 V","Position / Of Power Supply Cord":"Either top or bottom","Number Of Poles / With Protection":"1","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":"30 mA","operating current / at AC / rated value":"25 A","Influence Of The Surrounding Temperature":"Max. 95% humidity","Surge Current Resistance / At (8/20) μS":"1 kA","Product Function / Neutral Conductor Switching":"No","Mechanical Service Life (Switching Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/afd84d4cd92063d3fe7003ce39deab53.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=629259&mlfb=5SU9304-1KK25","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SU9304-1KK25/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 5SU9304-1KK25 and how do I get a price?","answer":"This part is sourced through independent distribution channels. Submit an RFQ for current availability and pricing — confirmed at quote time."},{"question":"What is 5SU9304-1KK25's listed depth (77 mm) on this component line?","answer":"The overall depth is 77 mm, with an installation depth of 70 mm behind the panel surface. The width is 18 mm (1 width unit) and height is 125 mm."},{"question":"Will 5SU9304-1KK25 drop into a panel that was specified around 5SY4116-7CV without rewiring?","answer":"Both are 1-pole+N RCBOs on an 18 mm footprint, so the mechanical fit is the same. But the 5SU9 series is an RCD-operated circuit breaker (combined device), whereas the 5SY series is a separate MCB — the wiring topology differs. Check whether your panel uses a separate RCD upstream or expects a combined RCBO before swapping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SU9304-1KK25","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/5SU9304-1KK25 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}}