{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU1424-8RC40","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU1424-8RC40","canonicalUrl":"https://aoctrl.com/siemens/5SU1424-8RC40","factsUrl":"https://aoctrl.com/api/mcp/products/5SU1424-8RC40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 5SU1424-8RC40 RCBO, 40 A, 2-pole, 4-module, D characteristic, Type A, 100 mA residual current.","salesMarkdown":"The Type A residual-current detection handles pulsating DC fault currents from single-phase rectifiers or switched-mode power supplies, not just pure sinusoidal AC. The 100 mA sensitivity is a delayed or selective trip threshold, typically used for fire protection or where nuisance tripping from leakage in long cable runs must be avoided. The 40 A rating governs the overcurrent protection — sized for a 40 A circuit, not a motor branch where the full-load current is lower and the D curve handles the start. The 2-pole configuration breaks both phase and neutral on a single-phase or split-phase supply. The Type A residual detection is the key differentiator from a basic AC-type RCD: it catches the pulsed DC fault currents that modern electronics generate, which a Type AC device would miss. ## Panel integration The 4-module width matches standard distribution board cutouts; the RCBO clips into the same rail as adjacent MCBs, RCCBs, and busbar systems. Terminal capacity accepts up to 25 mm² conductor for the 40 A rating — sufficient for the incoming supply tails and outgoing circuit wiring.","metaTitle":"Siemens 5SU1424-8RC40 RCBO 40 A 2-pole D char Type A 100mA","metaDescription":"Siemens 5SU1424-8RC40 RCBO, 40 A, 2-pole, 4-module, D characteristic, Type A, 100 mA residual. Current lifecycle stage. Quoted to order against RFQ.","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/dcf3334a4b7e16cd7b241936c6bcb4f9.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=29291&mlfb=5SU1424-8RC40","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SU1424-8RC40/alternatives.json"},"ai":{"faq":[{"question":"What is the 5SU1424-8RC40 used for?","answer":"It is a 2-pole RCBO rated 40 A with D characteristic and Type A 100 mA residual-current detection, used for combined overcurrent and earth-fault protection in circuits with high inrush loads (motors, transformers) and electronics that generate pulsating DC fault currents."},{"question":"Where can I buy the 5SU1424-8RC40?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SU1424-8RC40","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/5SU1424-8RC40 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}}