{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU9356-1KN40","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU9356-1KN40","canonicalUrl":"https://aoctrl.com/siemens/5SU9356-1KN40","factsUrl":"https://aoctrl.com/api/mcp/products/5SU9356-1KN40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SU9356-1KN40, RCBO, 2-pole 1P+N, 40 A, 30 mA, type AC, tripping characteristic C, 6 kA (EN 60898) / 10 kA (IEC 60947-2).","salesMarkdown":"The Siemens 5SU9356-1KN40 is a SENTRON RCBO — a combined RCD and MCB in one 2-module-wide (36 mm) package, saving a DIN rail position over separate devices. The 40 A rating at 30 °C (37.6 A at 40 °C, 34.8 A at 50 °C) covers most residential and light commercial final circuits; the 30 mA residual-current trip protects against lethal shock in AC systems. Tripping characteristic C means it holds up to 5–10× rated current for short overloads, so it won't nuisance-trip on motor or capacitor inrush but clears fast on a hard fault. Mounting position is any orientation. IP20 with conductors connected, so it's enclosed inside the panel. ## Derating and selectivity At 40 °C it's 37.6 A, at 50 °C it's 34.8 A, and at 55 °C it's 32.4 A — so in a warm panel or next to other heat-generating devices, size up or account for the drop. Energy limitation class 3 means it lets through less let-through energy on a fault, which helps with downstream coordination. Touch protection is built in on the terminals.","metaTitle":"Siemens 5SU9356-1KN40 SENTRON RCBO, 40 A, 30 mA, Type C, 2-p","metaDescription":"Siemens 5SU9356-1KN40 SENTRON RCBO, 40 A rated, 30 mA residual current, type AC, characteristic C, 6 kA (EN 60898) / 10 kA (IEC 60947-2). Current 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":"36 mm","Height":"90 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":"AC","Number Of Poles / Note":"1P+N","acc. to DIN EN 61346-2":"F","Energy Limitation Class":"3","Weight / With Packaging":"280 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":"2","Tripping Characteristic Class":"C","acc. to EN 60898 / rated value":"6 kA","For Testing Equipment / Minimum":"195 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","Supply Voltage Frequency / Rated Value":"50 Hz","Influence Of The Surrounding Temperature":"Max. 95% humidity","Surge Current Resistance / At (8/20) μS":"1 kA","Product Function / Neutral Conductor Switching":"Yes","Mechanical Service Life (Switching Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/79f6610cfebb3bc98ed563eb1e55c601.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=629371&mlfb=5SU9356-1KN40","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SU9356-1KN40/alternatives.json"},"ai":{"faq":[{"question":"What is the residual current rating and type?","answer":"30 mA, type AC — it detects sinusoidal AC fault currents only. For pulsating DC or smooth DC faults, a type A or type B RCBO would be needed."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SU9356-1KN40","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/5SU9356-1KN40 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}}