{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU9346-1CN40","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU9346-1CN40","canonicalUrl":"https://aoctrl.com/siemens/5SU9346-1CN40","factsUrl":"https://aoctrl.com/api/mcp/products/5SU9346-1CN40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SU9346-1CN40, RCBO, 4-pole, 40 A, 30 mA, Type AC, C-curve, 6 kA per EN 60898, 440 V insulation voltage, IP20, 7 MW.","salesMarkdown":"The Siemens SENTRON 5SU9346-1CN40 is a 4-pole RCBO — residual current operated circuit breaker with overcurrent protection — rated 40 A at 30 °C ambient, with a 30 mA residual trip threshold and a C tripping characteristic. This is the variant that combines the MCB and RCD functions in a single 7-module-width unit, saving a DIN-rail position compared to separate devices. The insulation voltage is rated 440 V, matching standard 400 V three-phase networks with headroom. The 40 A rating holds at 30 °C; at 40 °C it derates to 37.2 A, at 45 °C to 35.6 A, at 50 °C to 34.8 A, and at 55 °C to 34 A (–) — so if the panel ambient runs hot, factor the derating into the load schedule. That is fine for general-purpose circuits feeding resistive, inductive, or conventional rectifier loads, but if the downstream equipment includes variable-speed drives, LED drivers, or UPS systems that generate DC fault components, a Type A or Type F RCD would be required. The IP20 rating is standard for enclosed distribution boards — the touch protection is integral.","metaTitle":"Siemens SENTRON 5SU9346-1CN40 RCBO, 40 A, 30 mA, Type AC, C-","metaDescription":"Siemens SENTRON 5SU9346-1CN40 RCBO — 40 A rated, 30 mA residual current, 6 kA breaking capacity per EN 60898, Type AC, C-curve. Current lifecycle stage, available to order. Quoted","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Residual Current Breakers (RCCB/RCBO)"],"specifications":{"Depth":"77 mm","Width":"126 mm","title":"5SU9346-1CN40","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","description":"RCBO, Icn: 6 kA, 4P, Type AC, 30 mA, C-Char, In: 40 A, Un AC: 230 V","Halogen-Free":"Yes","Silicon-Free":"Yes","Number Of Poles":"4","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":"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":"AC","Energy Limitation Class":"3","Weight / With Packaging":"530 g","according to EN 61346-2":"F","at 30 °C / rated value":"40 A","at 40 °C / rated value":"37.2 A","at 45 °C / rated value":"35.6 A","at 50 °C / rated value":"34.8 A","at 55 °C / rated value":"34 A","according to IEC 81346-2":"F","Number Of Modular Width Units":"7","Tripping Characteristic Class":"C","For Testing Equipment / Minimum":"125 V","Position / Of Power Supply Cord":"Either top or bottom","Number Of Poles / With Protection":"4","Product Feature / Touch Protection":"Yes","according to EN 60898 / rated value":"6 kA","Tripping Fault Current / Rated Value":"30 mA","insulation voltage (Ui) / rated value":"440 V","Supply Voltage Frequency / Rated Value":"50 Hz","Surge Voltage Resistance / Rated Value":"4 000 V","according to IEC 60947-2 / rated value":"6 kA","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":"Yes","Mechanical Service Life (Switching Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/823f0dc20bef19ed73a79214ee38e72e.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=800749&mlfb=5SU9346-1CN40"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SU9346-1CN40?","answer":"The rated short-circuit breaking capacity is 6 kA per EN 60898, suitable for most sub-distribution boards where the prospective fault current is below that level."},{"question":"What is the difference between 5SU9346-1CN40 and 5SU9304-1KK32?","answer":"The 5SU9304-1KK32 is a 4-pole RCBO with a 40 A rating and 30 mA residual current, but with a B tripping characteristic instead of C. The B-curve trips at 3–5 times rated current, making it more suitable for resistive loads and long cable runs where nuisance tripping from inrush is not a concern. The C-curve on the 5SU9346-1CN40 handles moderate inrush from motor-starter and lighting circuits better. Both share the same 6 kA breaking capacity per EN 60898 and the same 7 MW footprint, so they are mechanically interchangeable in the panel — the choice is purely about the load's inrush profile."},{"question":"Where can I buy 5SU9346-1CN40 and how is it quoted?","answer":"The part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm commercial offer."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SU9346-1CN40","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/5SU9346-1CN40 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}