{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3UG4815-2AA40","brand":"Siemens","brandSlug":"siemens","productSlug":"3UG4815-2AA40","canonicalUrl":"https://aoctrl.com/siemens/3UG4815-2AA40","factsUrl":"https://aoctrl.com/api/mcp/products/3UG4815-2AA40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3UG4815-2AA40, network monitoring relay with digital setting, 22.5 mm wide, IP20, LCD display, 5 functions, 3 A at 400 V.","salesMarkdown":"The Siemens 3UG4815-2AA40 is a SIRIUS network monitoring relay with digital setting, built for AC phase monitoring. It packs five functions into a 22.5 mm wide housing — phase sequence, phase failure, asymmetry, undervoltage, and overvoltage — all configurable via the LCD display. The relay output is rated 3 A at 400 V (50/60 Hz), enough to drive a contactor coil or signal a PLC input directly. Snap-on mounting to DIN rail, IP20 finger-safe terminals, and any mounting position mean it fits into a crowded panel without special bracketing. The 3 A switching capacity at 400 V covers the typical contactor coil or small load — don't plan to switch a motor directly. The relay contacts are rated 1 A at 24 V, 0.2 A at 125 V, and 0.1 A at 250 V for DC loads, so inductive DC circuits need derating. Asymmetry detection is built in, not an add-on. The start-up delay (0 to 999.9 s) lets you ride through momentary sags or generator ramp-up, and auto-reset (with optional external reset) means the relay can re-close after a cleared fault without a manual pushbutton. IO-Link COM2 (38.4 kBaud) is on board for parameter backup and remote monitoring — useful if the panel is part of a networked line. The LCD shows the measured voltage and fault code, so a tech can read the cause without a laptop.","metaTitle":"Siemens 3UG4815-2AA40 SIRIUS Phase Monitoring Relay, 3 A at","metaDescription":"Siemens 3UG4815-2AA40 SIRIUS phase monitoring relay, 22.5 mm wide, IP20, LCD display, 5 functions, auto-reset, IO-Link COM2. Current lifecycle. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"NRND","categoryPath":["Process / Temperature Controllers"],"specifications":{"Depth":"91 mm","Solid":"24 ... 16","Width":"22.5 mm","Height":"103 mm","Upwards":"0 mm","at 24 V":"1 A","Forwards":"0 mm","Stranded":"24 ... 16","at 125 V":"0.2 A","at 250 V":"0.1 A","Backwards":"0 mm","Downwards":"0 mm","auto-RESET":"Yes","At The Side":"0 mm","Rated Value":"24 ... 24 V","When Starting":"0 ... 999.9 s","During Storage":"-40 ... +85 °C","External Reset":"Yes","For Monitoring":"AC","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","During Transport":"-40 ... +85 °C","Fastening Method":"snap-on mounting","Product Function":"Phase monitoring relay","Delayed Switching":"1","Mounting Position":"any","Product Brand Name":"SIRIUS","Asymmetry Detection":"Yes","Degree Of Pollution":"2","Product Designation":"Network monitoring relay with digital setting","display version LED":"No","protection class IP":"IP20","at 250 V at 50/60 Hz":"3 A","at 400 V at 50/60 Hz":"3 A","at 50 Hz rated value":"0 ... 0 V","at 60 Hz rated value":"0 ... 0 V","for AWG cables solid":"2x (24 ... 16)","Design Of The Display":"LCD","Design Of The Product":"5 functions","IO-Link transfer rate":"COM2 (38,4 kBaud)","Overvoltage Detection":"Yes","For Auxiliary Contacts":"1","Undervoltage Detection":"Yes","Phase Failure Detection":"Yes","for AWG cables stranded":"2x (24 ... 16)","Between Input And Output":"Yes","Relative Repeat Accuracy":"1 %","measurable voltage at AC":"160 ... 690 V","Phase Sequence Recognition":"Yes","Accuracy Of Digital Display":"+/-1 digit","Relative Metering Precision":"5 %","Of The Control Supply Voltage":"DC","Overvoltage Detection 3 Phase":"Yes","Substance Prohibitance (Date)":"05/01/2012","Type Of Electrical Connection":"spring-loaded terminals","Undervoltage Detection 3 Phases":"Yes","Voltage Window Recognition 3 Phase":"Yes","With Lower Or Upper Limit Violation":"0 ... 999.9 s","operational current at 17 V minimum":"20 mA","Surge Voltage Resistance Rated Value":"6 kV","With Degree Of Pollution 2 Rated Value":"690 V","protocol is supported IO-Link protocol":"Yes","due to burst according to IEC 61000-4-4":"2 kV","number of NC contacts delayed switching":"0","number of NO contacts delayed switching":"0","reference code according to IEC 81346-2":"K","Finely Stranded With Core End Processing":"0.25 ... 1.5 mm²","Number Of Poles For Main Current Circuit":"3","Finely Stranded Without Core End Processing":"0.25 ... 1.5 mm²","shock resistance according to IEC 60068-2-27":"sinusoidal half-wave 15g / 11 ms","Between The Voltage Supply And Other Circuits":"Yes","operating frequency with 3RT2 contactor maximum":"5 000 1/h","vibration resistance according to IEC 60068-2-6":"1 ... 6 Hz: 15 mm, 6 ... 500 Hz: 2g","Adjustable Open/Closed-Circuit Current Principle":"Yes","ampacity of the semiconductor output in SIO mode":"200 mA","Mechanical Service Life (Operating Cycles) Typical":"10 000 000","electrostatic discharge according to IEC 61000-4-2":"6 kV contact discharge / 8 kV air discharge","Type Of Voltage Supply Via Input/Output Link Master":"Yes","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Thermal Current Of The Switching Element With Contacts Maximum":"5 A","continuous current of the DIAZED fuse link of the output relay":"4 A","Of The Address Range Of The Inputs With Cyclical Transfer Total":"4 byte","Of The Address Range Of The Outputs With Cyclical Transfer Total":"2 byte","point-to-point cycle time between master and IO-Link device minimum":"10 ms","Product Component Removable Terminal For Auxiliary And Control Circuit":"Yes"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/3UG4815-2AA40/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings for the 3UG4815-2AA40?","answer":"It monitors AC phases with asymmetry detection, switches up to 3 A at 400 V (AC), has a 22.5 mm wide housing, IP20 protection, LCD display, and IO-Link COM2 communication."},{"question":"Can the 3UG4815-2AA40 be used for DC monitoring?","answer":"No, the monitoring function is specified for AC only."},{"question":"What compliance documentation is available for the 3UG4815-2AA40?","answer":"The evidence does not list specific compliance documents (RoHS, REACH, UL, IEC) for this order code. Standard Siemens SIRIUS documentation applies; confirm with your Siemens contact for project-specific declarations."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3UG4815-2AA40","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/3UG4815-2AA40 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}