{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU1444-8RC63","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU1444-8RC63","canonicalUrl":"https://aoctrl.com/siemens/5SU1444-8RC63","factsUrl":"https://aoctrl.com/api/mcp/products/5SU1444-8RC63","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SU1444-8RC63, RCBO, 63 A, 4-pole, 7 modules, D characteristic, Type A, 100 mA residual current.","salesMarkdown":"It combines a D-characteristic MCB for motor or high-inrush loads with a Type A residual-current device tripping at 100 mA. That Type A rating means it detects pulsating DC fault currents — the kind a single-phase rectifier or VFD front end can produce — not just pure sinusoidal AC leakage. The D characteristic provides a higher magnetic trip threshold (10 to 20 times In), sized for loads with a starting surge — transformers, small motors, solenoid banks. The 100 mA residual sensitivity is a deliberate choice: it's above the 30 mA threshold for personal shock protection, typically specified for equipment protection (fire prevention, insulation monitoring) or for circuits where nuisance tripping from normal leakage would be unacceptable. On a 4-pole 63 A frame, this combination suits sub-distribution feeding mixed inductive and electronic loads where earth-leakage coordination with upstream RCDs matters.","metaTitle":"Siemens 5SU1444-8RC63 RCBO, 63 A, 4-pole, Type A 100mA","metaDescription":"Siemens 5SU1444-8RC63 RCBO, 63 A, 4-pole, 7 modules, D characteristic, Type A, 100 mA residual. Current lifecycle stage. 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/dc74541e3a7d258bcb76ce676092bba8.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=484950&mlfb=5SU1444-8RC63","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SU1444-8RC63/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy the 5SU1444-8RC63?","answer":"This RCBO is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What does 'D characteristic Type A 100mA' mean for the 5SU1444-8RC63?","answer":"The D characteristic means the overcurrent trip is set for high-inrush loads (10–20× rated current), while Type A 100 mA means the residual-current element detects pulsating DC faults and trips at 100 mA — suited for equipment protection rather than personal shock protection."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SU1444-8RC63","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/5SU1444-8RC63 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}}