{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU1644-2RC63","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU1644-2RC63","canonicalUrl":"https://aoctrl.com/siemens/5SU1644-2RC63","factsUrl":"https://aoctrl.com/api/mcp/products/5SU1644-2RC63","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 5SU1644-2RC63 RCBO, 63 A, 4-pole, 8 modules, D characteristic, Type AC, 300 mA residual current.","salesMarkdown":"## RCBO with D-curve and 300 mA residual protection The D characteristic means it handles high inrush currents — typical for motor, transformer, or welding loads — without nuisance tripping. The Type AC 300 mA residual current protection covers sinusoidal AC earth faults. 63 A at 4-pole covers three-phase loads up to that current — think 30-40 kW motor circuits, large distribution subfeeds, or industrial machine supplies. The 300 mA AC residual element protects against line-to-ground faults, not personnel shock (which needs 30 mA or lower). This is a common spec for distribution boards feeding fixed equipment where arc-fault protection is required but not direct human contact. Plan for that fill factor when laying out the enclosure — a 4-pole RCBO at this rating is a wide device.","metaTitle":"Siemens 5SU1644-2RC63 RCBO 63A 4-pole D-curve 300mA","metaDescription":"Siemens 5SU1644-2RC63 RCBO, 63 A, 4-pole, 8 modules, D characteristic, Type AC 300mA residual. Lifecycle stage: current. Sourced 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=27034&mlfb=5SU1644-2RC63","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SU1644-2RC63/alternatives.json"},"ai":{"faq":[{"question":"What is the 5SU1644-2RC63's key specification?","answer":"It is a 63 A, 4-pole RCBO with D characteristic and Type AC 300 mA residual current protection, occupying 8 DIN modules."},{"question":"Where can I buy the 5SU1644-2RC63?","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/5SU1644-2RC63","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/5SU1644-2RC63 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}}