{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU1644-8RC63","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU1644-8RC63","canonicalUrl":"https://aoctrl.com/siemens/5SU1644-8RC63","factsUrl":"https://aoctrl.com/api/mcp/products/5SU1644-8RC63","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SU1644-8RC63, RCBO (residual current circuit breaker with overcurrent protection), 63 A, 4-pole, 7 modules, D characteristic, Type A, 300 mA residual current.","salesMarkdown":"This is the part for a sub-feed or final circuit where you need both overcurrent and earth-fault protection in one DIN-rail unit — saves a module slot compared to separate MCB and RCCB. The D curve handles motor inrush and transformer loads without nuisance tripping; the 300 mA Type A residual detects pulsating DC fault currents common on variable-speed drives and electronic loads.","metaTitle":"Siemens 5SU1644-8RC63 RCBO 63A 4-pole D curve Type A 300mA","metaDescription":"Siemens 5SU1644-8RC63 RCBO, 63 A, 4-pole, 7 modules, D characteristic, Type A, 300 mA residual. Current lifecycle stage. Available 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/bed74928c9539d6c50f1eb1e06da07d1.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=304608&mlfb=5SU1644-8RC63","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SU1644-8RC63/alternatives.json"},"ai":{"faq":[{"question":"What does the D characteristic mean on this RCBO?","answer":"The D tripping characteristic means the magnetic trip operates at 10 to 20 times the rated current (63 A), so it's sized for loads with high inrush — motors, transformers, welding equipment — without nuisance tripping on startup."},{"question":"What is the 5SU1644-8RC63 used for?","answer":"It's a combined overcurrent and residual-current device (RCBO) for 4-pole circuits up to 63 A, providing D-curve overcurrent protection and Type A 300 mA earth-fault protection in a single 7-module DIN-rail unit."},{"question":"Where can I buy the 5SU1644-8RC63?","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/5SU1644-8RC63","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/5SU1644-8RC63 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}}