{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU9304-0KK40","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU9304-0KK40","canonicalUrl":"https://aoctrl.com/siemens/5SU9304-0KK40","factsUrl":"https://aoctrl.com/api/mcp/products/5SU9304-0KK40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON RCBO, 10 kA, 1P+N, Type AC, 30 mA, B char., In: 40 A, Un AC: 230 V, pigtail 600 mm, solid N.","salesMarkdown":"The Siemens 5SU9304-0KK40 is a SENTRON RCBO — an RCD-operated circuit breaker combining overcurrent and residual-current protection in one 18 mm-wide module. It's rated 40 A with a B-curve trip characteristic and 30 mA Type AC residual sensitivity, breaking capacity 10 kA per EN 60898 and IEC 60947-2. The 1P+N design protects one live pole while switching the neutral, and the 600 mm pigtail with solid neutral simplifies wiring in distribution boards. The B-curve (3-5 In magnetic trip) is the default for general-purpose socket circuits and lighting; it avoids nuisance tripping from inrush on resistive loads while still clearing fast on hard shorts. At 18 mm width (1 modular unit), it occupies one DIN-rail position — critical when backfilling an existing board where every slot counts. The 30 mA Type AC residual sensitivity catches sinusoidal AC earth faults — the most common type in domestic and office wiring. It's not suitable for pulsating DC or smooth DC fault currents (Type A or F would be needed for EV chargers, VFD-fed circuits, or three-phase rectifier loads). Mounts in any position on standard DIN rail. The 1 MW width occupies one position. The -40 °C to +75 °C ambient range covers unheated utility rooms and outdoor enclosures in temperate climates.","metaTitle":"Siemens 5SU9304-0KK40 SENTRON RCBO, 40A, 10kA, B-Curve, 30mA","metaDescription":"Siemens SENTRON 5SU9304-0KK40 RCBO. 40A, 10kA breaking capacity, B-curve, 30mA Type AC, 1P+N, 230V AC. Active production. 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","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":"B","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=629254&mlfb=5SU9304-0KK40","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SU9304-0KK40/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source to 5SU9304-0KK40?","answer":"The 5SY6040-6 is a Siemens MCB (overcurrent only) with similar 40 A B-curve rating and 1 MW width, but it lacks the integrated RCD function. The 5SU9304-0KK40 is an RCBO — it combines overcurrent and 30 mA residual-current protection in one unit. If your design needs the combined protection, the 5SY series alone won't drop in without adding a separate RCCB."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SU9304-0KK40","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/5SU9304-0KK40 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}}