{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3UG5512-2AR21","brand":"Siemens","brandSlug":"siemens","productSlug":"3UG5512-2AR21","canonicalUrl":"https://aoctrl.com/siemens/3UG5512-2AR21","factsUrl":"https://aoctrl.com/api/mcp/products/3UG5512-2AR21","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3UG5512-2AR21 monitoring relay, phase failure, phase sequence and asymmetry monitoring, 3x 160-690 V AC, 15-70 Hz, 1 changeover contact, spring-loaded terminal, SIL 1/PL c.","salesMarkdown":"The Siemens 3UG5512-2AR21 is a line monitoring relay from the SIRIUS family, purpose-built for three-phase networks. It detects phase failure, incorrect phase sequence, and asymmetry across a supply range of 3x 160-690 V AC at 15-70 Hz, outputting a single changeover contact via spring-loaded terminals. The SIL 1/PL c rating means it can be used in basic safety-related control circuits up to Performance Level c per ISO 13849-1. The 160-690 V AC operating range covers standard low-voltage motor supplies (400 V, 480 V, 575 V) without needing a separate voltage tap. Spring-loaded terminals accept 0.2-2.5 mm² conductors — no screwdriver needed for wiring, which speeds panel assembly. The single changeover contact (1 CO) is enough to signal a PLC digital input or drop out a contactor coil; if you need two isolated signals, you'll need an auxiliary relay.","metaTitle":"Siemens 3UG5512-2AR21 monitoring relay, phase failure/sequen","metaDescription":"Siemens 3UG5512-2AR21 line monitoring relay: phase failure, sequence, asymmetry for 3x160-690 V AC, 15-70 Hz, 1 changeover contact, spring-loaded terminals, SIL 1/PL c. Active prod","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Process / Temperature Controllers"],"specifications":{"title":"3UG5512-2AR21","Group Code":"R711","description":"monitoring relay phase failure, phase sequence and asymmetry monitoring 3x 160-690 V AC, 15-70 Hz 1 changeover contact spring-loaded 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)":"125.00 x 111.00 x 33.00 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/0a1571c16f73cfd162d5a31c278a37f2.pdf","sourceUrl":"https://sieportal.siemens.com/en-ae/products-services/detail/3UG5512-2AR21?tree=CatalogTree"},"ai":{"faq":[{"question":"What compliance documentation does Siemens provide for this relay?","answer":"RoHS compliance is effective since June 2023. REACH Article 33 applies due to lead content above 0.1% w/w — the manufacturer provides the necessary duty-to-inform documentation. Export control is AL: N / ECCN: N, so no special licensing is required for most destinations."},{"question":"What are the key ratings of the 3UG5512-2AR21?","answer":"It monitors three-phase supplies from 160 to 690 V AC at 15-70 Hz. Output is one changeover relay contact with spring-loaded terminals. Safety integrity: SIL 1 / PL c."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3UG5512-2AR21","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/3UG5512-2AR21 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}}