{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3UG5816-2AA40","brand":"Siemens","brandSlug":"siemens","productSlug":"3UG5816-2AA40","canonicalUrl":"https://aoctrl.com/siemens/3UG5816-2AA40","factsUrl":"https://aoctrl.com/api/mcp/products/3UG5816-2AA40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3UG5816-2AA40, digitally adjustable monitoring relay, phase failure/sequence/asymmetry/frequency/overvoltage/undervoltage, 90-690 V AC, 15-70 Hz, 1 changeover contact, spring-loaded terminal, IO-Link.","salesMarkdown":"The Siemens 3UG5816-2AA40 is a digitally adjustable monitoring relay from the SIRIUS line monitoring family, covering phase failure, phase sequence, asymmetry, frequency, overvoltage, and undervoltage on three-phase systems with or without a neutral conductor. It operates across 90-690 V AC at 15-70 Hz, making it suitable for 50/60 Hz networks worldwide. The single changeover contact is rated for general-purpose switching, and the spring-loaded terminals accept 0.2-2.5 mm² conductors — no screwdriver needed for termination. IO-Link connectivity gives the PLC direct access to the measured values and device diagnostics, which saves a panel scan for a separate analog input. The 90-690 V AC input range covers low-voltage networks from 110 V to 690 V line-to-line without needing a separate voltage tap. Phase asymmetry detection triggers when the voltage imbalance exceeds the adjustable threshold — typically set at 5-10 % to catch a failing motor winding or a loose connection before the motor overheats. The single changeover contact (SPDT) is enough to drive a PLC digital input or a contactor coil; if you need two isolated signals, you will need an auxiliary relay block. ## Integration notes The packaging dimensions (127 x 111 x 38 mm) give you the footprint for panel layout — it occupies roughly 4 module widths on the rail. IO-Link communication uses the standard M12 connector (not included); set the IO-Link address via the master or the onboard DIP switches. The relay's self-test and measured-value output can be polled cyclically, which eliminates the need for a separate analog input module for voltage monitoring.","metaTitle":"Siemens 3UG5816-2AA40 Line Monitoring Relay, 90-690 V AC, IO","metaDescription":"Siemens 3UG5816-2AA40 digitally adjustable monitoring relay for phase failure, sequence, asymmetry, frequency, over/undervoltage. 90-690 V AC, 15-70 Hz, 1 changeover contact, sprin","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Process / Temperature Controllers"],"specifications":{"title":"3UG5816-2AA40","Group Code":"R711","description":"digitally adjustable monitoring relay phase failure, phase sequence, asymmetry, frequency, overvoltage and undervoltage monitoring with/without N conductor for IO-Link 3x 90-690 V AC, 15-70 Hz 1 changeover contact 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/de74906938702dcbb2575782c1ac4d6f.pdf","sourceUrl":"https://sieportal.siemens.com/en-ae/products-services/detail/3UG5816-2AA40?tree=CatalogTree"},"ai":{"faq":[{"question":"What are the key ratings for the 3UG5816-2AA40?","answer":"Supply voltage 90-690 V AC, frequency range 15-70 Hz, one changeover contact (SPDT) with spring-loaded terminals. IO-Link capable for direct PLC communication of measured values and diagnostics."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3UG5816-2AA40","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/3UG5816-2AA40 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}}