{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU9304-7KK40","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU9304-7KK40","canonicalUrl":"https://aoctrl.com/siemens/5SU9304-7KK40","factsUrl":"https://aoctrl.com/api/mcp/products/5SU9304-7KK40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SU9304-7KK40, RCBO, 2-pole, 40 A, C-curve, 30 mA Type A, 10 kA, 1 MW wide.","salesMarkdown":"This is the version that protects one pole (line) while switching both poles; the neutral pole is switched but not protected. The 40 A rating at 30 °C derates to 37.6 A at 40 °C and 32.4 A at 55 °C (–). If your panel ambient sits at 45 °C, you're limited to 36.4 A continuous — a 3.6 A drop from the nameplate. The 30 mA Type A residual current trip catches pulsating DC fault currents from electronics and rectified loads, not just pure sinusoidal AC. The 18 mm width (1 MW) means it occupies one modular unit — critical when you're packing multiple RCBOs into a sub-distribution board. Mounting position is unrestricted: horizontal, vertical, upside-down — the electromechanical mechanism and arc chamber are orientation-independent. IP20 with conductors connected, which is standard for enclosed distribution boards.","metaTitle":"Siemens 5SU9304-7KK40 SENTRON RCBO, 2-pole, 40 A, C-curve, 3","metaDescription":"Siemens SENTRON 5SU9304-7KK40 RCD-operated circuit breaker, 2-pole, 40 A rated, 30 mA residual current, C-curve, 10 kA breaking capacity. 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":"18 mm","Height":"125 mm","Maximum":"75 °C","Minimum":"-40 °C","Halogen-Free":"Yes","Silicon-Free":"Yes","Number Of Poles":"2","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","acc. to IEC 81346-2":"F","at AC / rated value":"40 A","protection class IP":"IP20, if the distribution board is installed, with connected conductors","Overvoltage Category":"III","Design Of The Product":"Instantaneous","Residual Current Type":"A","acc. to DIN EN 61346-2":"F","Energy Limitation Class":"3","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","Number Of Modular Width Units":"1","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","Tripping Fault Current / Rated Value":"30 mA","insulation voltage (Ui) / rated value":"264 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":"1 kA","Type Of Voltage / Of The Operating Voltage":"AC","Product Component / 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=629269&mlfb=5SU9304-7KK40","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SU9304-7KK40/alternatives.json"},"ai":{"faq":[{"question":"What is 5SU9304-7KK40's depth and width?","answer":"Depth is 77 mm overall (70 mm installation depth), width is 18 mm (1 modular unit)."},{"question":"Will 5SU9304-7KK40 drop into a panel specified around 5SL6550-7BB?","answer":"Both are 1 MW wide DIN-rail RCBOs, but the 5SL6550-7BB is a 50 A B-curve unit versus this 40 A C-curve. The footprint and terminal layout are similar — same SENTRON family — but verify the current rating and trip curve match your circuit design before swapping."},{"question":"How do I get current pricing and availability for 5SU9304-7KK40?","answer":"Submit an RFQ through this listing. Pricing and stock levels are confirmed at quote time through our independent distribution network."},{"question":"What compliance documentation does this brand provide for 5SU9304-7KK40?","answer":"The part carries IEC 60898 and IEC 60947-2 ratings, overvoltage category III, pollution degree 2. It is halogen-free and silicon-free. Standard Siemens SENTRON declaration of conformity covers CE, UKCA, and EAC for the distribution board market."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SU9304-7KK40","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/5SU9304-7KK40 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}}