{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3UG5643-2CS20","brand":"Siemens","brandSlug":"siemens","productSlug":"3UG5643-2CS20","canonicalUrl":"https://aoctrl.com/siemens/3UG5643-2CS20","factsUrl":"https://aoctrl.com/api/mcp/products/3UG5643-2CS20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3UG5 series digital monitoring relay, order code 3UG5643-2CS20, 90 to 690 V AC/DC supply, 0.05 to 10 A measuring range, 2 changeover contacts, spring-loaded terminals.","salesMarkdown":"The 3UG5643-2CS20 is a digital monitoring relay from the Siemens SIRIUS 3UG5 family, designed to monitor current, active current, voltage, power factor, and power in a single device. It operates from a 90 to 690 V AC/DC internal power supply and accepts a measuring input of 0.05 to 10 A. Two changeover contacts with spring-loaded terminals handle the output. This is an active, current-production part. Supply and measurement share the same terminals — the relay is self-powered from the monitored circuit across 90 to 690 V AC/DC, so no auxiliary supply is needed. The 0.05 to 10 A current input covers most motor and feeder monitoring ranges without an external CT, though you can still use one if the primary current exceeds 10 A. On-delay and tripping delay are independently adjustable from 0.1 to 999.9 s, giving you flexibility to ride through inrush or transient events. Spring-loaded terminals accept 0.2 to 2.5 mm² solid or ferruled stranded wire; strip length 8 mm. The 127 x 111 x 38 mm package fits a standard DIN-rail footprint with room for adjacent devices in the panel.","metaTitle":"Siemens 3UG5643-2CS20 Digital Monitoring Relay, 90-690 V AC/","metaDescription":"Siemens 3UG5643-2CS20 digital monitoring relay for current, voltage, power factor, and power. 90-690 V AC/DC supply, 0.05-10 A input, 2 changeover contacts, spring-loaded terminals","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Process / Temperature Controllers"],"specifications":{"title":"3UG5643-2CS20","Group Code":"R711","description":"digital monitoring relay current, active current, voltage, cos-phi and performance monitoring 90 to 690 V AC/DC with internal power supply 0.05 to 10 A 24... 240 V AC/DC, 50.. 60 Hz ON delay and tripping delay 0.1..999.9 s 2 changeover contacts spring-loaded terminal","Product Group":"5885","Product class":"A: Standard product which is a stock item could be returned within the returns guidelines/period.","Quantity Unit":"1 Piece","Product Family":"Current, active current, voltage, power factor and power monitoring","lifecycle_stage":"current","Packaging Quantity":"1","Export Control Regulations":"AL : N / ECCN : 9N9999","Packaging dimensions (L x W x H)":"127.00 x 111.00 x 38.00 mm","Compliance with the substance restrictions according to RoHS directive":"Since: 01-06-23","REACH Art. 33 Duty to inform according to the current list of candidates":"Lead CAS-No. 7439-92-1 > 0,1 % (w / w)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/e2830fe5a032edbcd04c09f144324b6a.pdf","sourceUrl":"https://sieportal.siemens.com/en-ae/products-services/detail/3UG5643-2CS20?tree=CatalogTree"},"ai":{"faq":[{"question":"What compliance documentation is available for this relay?","answer":"RoHS compliance effective June 2023. REACH Article 33 disclosure: lead CAS 7439-92-1 > 0.1% w/w. Export control: AL: N / ECCN: 9N9999."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3UG5643-2CS20","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/3UG5643-2CS20 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}