{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3UG5618-1CR21","brand":"Siemens","brandSlug":"siemens","productSlug":"3UG5618-1CR21","canonicalUrl":"https://aoctrl.com/siemens/3UG5618-1CR21","factsUrl":"https://aoctrl.com/api/mcp/products/3UG5618-1CR21","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3UG5 series, 3UG5618-1CR21 digitally adjustable monitoring relay, 3x 90-690 V AC, 15-70 Hz, 2 changeover contacts, screw terminal, SIL 1/PL c.","salesMarkdown":"The Siemens 3UG5618-1CR21 is a digitally adjustable monitoring relay from the SIRIUS 3UG5 line monitoring family. It watches three-phase mains for phase failure, phase sequence, asymmetry, frequency deviation, and over- or under-voltage conditions, and it can correct a phase sequence error automatically. The input range covers 90 to 690 V AC at 15 to 70 Hz — wide enough to handle most low-voltage industrial supplies without an external PT. Two changeover contacts give you separate alarm and trip paths, or a single channel with a confirmation feedback loop. RoHS compliance is declared effective 01 June 2023. Screw terminals on the 3UG5618-1CR21 — not push-in. Budget an extra minute per wire versus a spring-cage terminal block; the trade-off is a more vibration-resistant connection in a panel that sees regular door-slamming or near a contactor bank. Strip length and torque spec are on the device label; no special tool needed. Packaged dimensions are 127 x 111 x 38 mm — standard SIRIUS 3UG5 width, snaps onto a 35 mm DIN rail. Single unit per box; order multiples if you are stocking spares for a multi-panel line.","metaTitle":"Siemens 3UG5618-1CR21 Line Monitoring Relay, 90-690 VAC","metaDescription":"Active production Siemens 3UG5618-1CR21 digitally adjustable monitoring relay. Monitors phase failure, sequence, asymmetry, frequency, over/under-voltage. 2 changeover contacts, SI","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Process / Temperature Controllers"],"specifications":{"title":"3UG5618-1CR21","Group Code":"R711","description":"digitally adjustable monitoring relay phase failure, phase sequence, asymmetry, frequency, over- and under-voltage monitoring with phase sequence correction 3x 90-690 V AC, 15-70 Hz 2 changeover contacts screw terminal SIL 1/PL c","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":"Line monitoring","lifecycle_stage":"current","Packaging Quantity":"1","Export Control Regulations":"AL : N / ECCN : N","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/7d39f2a2ac293100b23db2c9d92c13ce.pdf","sourceUrl":"https://sieportal.siemens.com/en-ae/products-services/detail/3UG5618-1CR21?tree=CatalogTree"},"ai":{"faq":[{"question":"What compliance documentation is available for this relay?","answer":"RoHS compliance effective 01 June 2023 is declared. REACH Article 33 disclosure applies due to lead (CAS 7439-92-1) above 0.1% w/w. No UL or CSA listing is stated in the available documentation."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3UG5618-1CR21","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/3UG5618-1CR21 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}}