{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU1444-8RC32","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU1444-8RC32","canonicalUrl":"https://aoctrl.com/siemens/5SU1444-8RC32","factsUrl":"https://aoctrl.com/api/mcp/products/5SU1444-8RC32","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 5SU1444-8RC32 RCBO, 32 A, 4-pole, 7 modules, D characteristic, Type A, 100 mA residual current.","salesMarkdown":"## What this RCBO carries The Siemens 5SU1444-8RC32 is a 4-pole RCBO rated 32 A with D characteristic overcurrent protection and Type A residual current detection at 100 mA. It occupies 7 module widths on a DIN rail, standard for a 4-pole unit in the 5SU4 line. The Type A residual detects pulsating DC fault currents, which standard AC-only RCDs miss; common on variable-speed drives and electronic loads. At 32 A and 4-pole, this unit handles three-phase plus neutral in a single enclosure — typical for a sub-distribution board feeding a small machine or a lighting circuit in an industrial panel. Snap-on DIN rail mount, 7 module spaces at 18 mm each — 126 mm total width. Standard for a 4-pole RCBO in a Siemens 5SU4 or 5SM6 enclosure system. Busbar-compatible with the Siemens 5ST3 series for feed-through or splitter configurations.","metaTitle":"Siemens 5SU1444-8RC32 RCBO 32 A 4-pole D-characteristic Type","metaDescription":"Siemens 5SU1444-8RC32 RCBO, 32 A, 4-pole, 7 modules, D characteristic, Type A, 100mA residual. Current lifecycle stage. Sourced to order against an 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/ae7cfd2ddf3e98809affcd0f3eec82f1.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=448740&mlfb=5SU1444-8RC32","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SU1444-8RC32/alternatives.json"},"ai":{"faq":[{"question":"What does the D characteristic and Type A residual mean on this RCBO?","answer":"The D characteristic trips magnetically at 10–20× rated current (320–640 A for this 32 A unit), designed for high-inrush loads like motors or transformers. Type A residual detects pulsating DC fault currents — required downstream of VFDs, UPS systems, or other electronic loads that an AC-only RCD would miss."},{"question":"Where can I buy the Siemens 5SU1444-8RC32?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Submit a request for current availability and pricing — no stock count or lead-time figure is published on this listing."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SU1444-8RC32","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/5SU1444-8RC32 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}}