{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU9304-1KK40","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU9304-1KK40","canonicalUrl":"https://aoctrl.com/siemens/5SU9304-1KK40","factsUrl":"https://aoctrl.com/api/mcp/products/5SU9304-1KK40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SU9304-1KK40, RCD-operated circuit breaker (RCBO), 1P+N, 40 A, 10 kA, Type A, tripping characteristic C, 18 mm modular width.","salesMarkdown":"The Siemens 5SU9304-1KK40 is a SENTRON-series RCBO — an RCD-operated circuit breaker that combines overcurrent protection and residual current detection in a single 18 mm-wide module. ## Thermal derating and mounting flexibility At 40 °C it derates to 37.6 A, at 45 °C to 36.4 A, at 50 °C to 34.8 A, and at 55 °C to 32.4 A. If the panel ambient runs warm, size the upstream protection accordingly. ## Integration into a panel The installation depth is 70 mm, and the overall depth is 77 mm — check that the enclosure or distribution board has clearance for that depth plus wiring space.","metaTitle":"Siemens 5SU9304-1KK40 SENTRON RCBO, 40 A, 10 kA, Type A","metaDescription":"Siemens 5SU9304-1KK40 SENTRON RCBO, 40 A rated, 10 kA breaking capacity (IEC/EN), Type A, 1P+N, 18 mm wide. Current production status. 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":"18 mm","Height":"125 mm","Maximum":"75 °C","Minimum":"-40 °C","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"1P+N","Number Of Poles":"2","lifecycle_stage":"current","Mounting Position":"any","at AC rated value":"230/240 V","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"2","Operating Frequency":"50/60 Hz","Product Designation":"RCD-operated circuit breaker","protection class IP":"IP20, if the distribution board is installed, with connected conductors","Overvoltage Category":"III","Design Of The Product":"Instantaneous","Weight With Packaging":"260 g","at 30 °C rated value":"40 A","at 40 °C rated value":"37.6 A","at 45 °C rated value":"36.4 A","at 50 °C rated value":"34.8 A","at 55 °C rated value":"32.4 A","Energy Limitation Class":"3","For Testing Equipment Minimum":"115 V","Number Of Modular Width Units":"1","Position Of Power Supply Cord":"Either top or bottom","Tripping Characteristic Class":"C","Number Of Poles With Protection":"1","according to EN 60898 rated value":"10 kA","insulation voltage (Ui) rated value":"264 V","Supply Voltage Frequency Rated Value":"50 Hz","Surge Voltage Resistance Rated Value":"4 000 V","according to IEC 60947-2 rated value":"10 kA","Surge Current Resistance At (8/20) μS":"1 kA","Influence Of The Surrounding Temperature":"Max. 95% humidity","Type Of Voltage Of The Operating Voltage":"AC","Mechanical Service Life (Operating Cycles) Typical":"10 000","for rated value of the current at AC in hot operating state per pole":"0.75 W"}},"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=629261&mlfb=5SU9304-1KK40","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SU9304-1KK40/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SU9304-1KK40?","answer":"It is rated 10 kA per both EN 60898 and IEC 60947-2, which is the standard interrupting rating for this class of RCBO in commercial panelboards."},{"question":"What is the width of 5SU9304-1KK40?","answer":"18 mm, which is one modular unit (1 MW) on a standard DIN rail."},{"question":"Where can I buy 5SU9304-1KK40?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time."},{"question":"Will 5SU9304-1KK40 drop into a panel specified around 5SY4116-7CV?","answer":"Both are 18 mm wide DIN-rail devices, so the mechanical fit is the same. However, 5SU9304-1KK40 is an RCBO (overcurrent + RCD combined), while the 5SY series are standalone MCBs. The wiring and circuit design differ — verify the circuit requires combined protection before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SU9304-1KK40","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/5SU9304-1KK40 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}}