{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3UG5514-2BR20","brand":"Siemens","brandSlug":"siemens","productSlug":"3UG5514-2BR20","canonicalUrl":"https://aoctrl.com/siemens/3UG5514-2BR20","factsUrl":"https://aoctrl.com/api/mcp/products/3UG5514-2BR20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 3UG5514-2BR20, Line monitoring, analog adjustment monitoring relay, phase failure, phase sequence, asymmetry, under-voltage, 3x 160-690 V AC, 15-70 Hz, 2 changeover contacts, spring-loaded terminal.","salesMarkdown":"The Siemens 3UG5514-2BR20 is an analog adjustment monitoring relay that covers four fault conditions on a three-phase line: phase failure, phase sequence reversal, phase asymmetry, and under-voltage. It accepts a wide supply range of 3x 160-690 V AC at 15-70 Hz, making it suitable for 50/60 Hz industrial networks across standard low-voltage distributions. The two changeover contacts (2 CO) are rated for the control circuit, and the spring-loaded terminals speed wiring in panel builds — no screwdriver torque check needed. The 160-690 V AC input range covers 208 V, 400 V, and 690 V three-phase systems without needing a separate supply transformer. Phase asymmetry detection is a fixed percentage threshold set by the analog dial — useful for catching a blown fuse or a single-phase motor load imbalance before the motor protection trips. The two changeover contacts are typically wired to the PLC digital input or to a shunt-trip coil on the main breaker. The housing dimensions are 127 x 111 x 38 mm (L x W x H) — fits a standard DIN-rail footprint with room for adjacent relays or terminal blocks. The analog adjustment potentiometer is on the front face, so set the threshold before snapping the relay onto the rail if the adjacent device clearance is tight.","metaTitle":"Siemens 3UG5514-2BR20 Line Monitoring Relay, 160-690 V AC, 2","metaDescription":"Siemens 3UG5514-2BR20 analog adjustment monitoring relay for phase failure, sequence, asymmetry, and under-voltage. 3x 160-690 V AC, 15-70 Hz, 2 changeover contacts, spring-loaded","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Process / Temperature Controllers"],"specifications":{"title":"3UG5514-2BR20","Group Code":"R711","description":"analog adjustment monitoring relay phase failure, phase sequence, asymmetry and under-voltage monitoring 3x 160-690 V AC, 15-70 Hz 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":"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/b31ae6eedb975d383b999d1a3136a6c3.pdf","sourceUrl":"https://sieportal.siemens.com/en-ae/products-services/detail/3UG5514-2BR20?tree=CatalogTree"},"ai":{"faq":[{"question":"What compliance documentation is available for this relay?","answer":"RoHS compliance effective 01-06-23. REACH Article 33 notification applies due to lead content (CAS-No. 7439-92-1) above 0.1% w/w. No export control restrictions (AL: N / ECCN: N)."},{"question":"What is the group code and product group for the 3UG5514-2BR20?","answer":"Group Code R711; Product Group 5885."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3UG5514-2BR20","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/3UG5514-2BR20 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}}