{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU9356-2CN40","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU9356-2CN40","canonicalUrl":"https://aoctrl.com/siemens/5SU9356-2CN40","factsUrl":"https://aoctrl.com/api/mcp/products/5SU9356-2CN40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 5SU9356-2CN40 RCBO, 1+N poles, 6 kA breaking capacity, D characteristic, type AC, Construction line, 40 A.","salesMarkdown":"The 'type AC' detection handles sinusoidal AC residual currents only; if your circuit has pulsed DC or smooth DC fault currents (variable-speed drives, UPS systems), you'd want a type A or F instead. The D-curve trip threshold (10–20× In) delays tripping long enough for motor-starting or capacitor-bank inrush to pass without nuisance trips. The 1+N configuration switches the line conductor and disconnects the neutral but does not protect the neutral against overcurrent; it's the standard arrangement for single-phase final circuits in many European and Asian markets. ## Panel Integration The Construction line designation indicates it's built for the residential and commercial building market — compact module width, finger-safe terminals, and a busbar-compatible connection system for multi-pole grouping. Verify the busbar pitch matches your panel's layout before committing the assembly.","metaTitle":"Siemens 5SU9356-2CN40 RCBO 1+N 6kA D Curve 40A","metaDescription":"Siemens 5SU9356-2CN40 RCBO 1+N, 6 kA breaking capacity, D characteristic, type AC, 40 A. Current production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Residual Current Breakers (RCCB/RCBO)"],"specifications":{"lifecycle_stage":"current"}},"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=993523&mlfb=5SU9356-2CN40","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SU9356-2CN40/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy the 5SU9356-2CN40 and get a price?","answer":"This 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 price and lead time."},{"question":"What does the D characteristic mean on this RCBO?","answer":"The D curve trips at 10–20 times the rated current (400–800 A for this 40 A unit), making it suitable for circuits with high inrush loads like motors, transformers, or welding equipment where a B or C curve would nuisance-trip on startup."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SU9356-2CN40","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/5SU9356-2CN40 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}}