{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3UG4615-1CR20","brand":"Siemens","brandSlug":"siemens","productSlug":"3UG4615-1CR20","canonicalUrl":"https://aoctrl.com/siemens/3UG4615-1CR20","factsUrl":"https://aoctrl.com/api/mcp/products/3UG4615-1CR20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3UG4615-1CR20 network monitoring relay, phase monitoring, 160-690 V AC, 50/60 Hz, 3 A contact, LCD display, IP20, snap-on mounting.","salesMarkdown":"## Phase monitoring relay with LCD and five-function flexibility The Siemens 3UG4615-1CR20 is a SIRIUS network monitoring relay that watches three-phase AC supplies for undervoltage, overvoltage, phase loss, phase sequence, and asymmetry — five functions in one 22.5 mm-wide housing. The LCD display shows the measured voltage and fault type, so a field tech can read the trip cause without a meter. Rated for 160 to 690 V AC at 50 or 60 Hz, it covers the common low-voltage distribution range from 208 V to 600 V without needing a separate PT. The output relay switches 3 A at 250 V or 400 V AC, enough to signal a PLC input or drop out a contactor coil directly. Asymmetry detection is built in — it monitors voltage imbalance indirectly through the voltage limit thresholds, so a failing motor winding or a loose connection on one phase will trip the relay before the motor overheats. ## Mounting and environment — fits any panel orientation IP20 finger-safe terminals accept 2 x 14 to 20 AWG solid or stranded wire.","metaTitle":"Siemens 3UG4615-1CR20 SIRIUS Phase Monitoring Relay, 160-690","metaDescription":"Siemens 3UG4615-1CR20 SIRIUS phase monitoring relay, 160-690 V AC, 50/60 Hz, 3 A contact rating, LCD display, IP20. Active 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":"20 ... 14","Width":"22.5 mm","Height":"92 mm","Upwards":"0 mm","at 24 V":"1 A","Forwards":"0 mm","Stranded":"20 ... 14","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","Initial Value":"1","During Storage":"-40 ... +85 °C","For Monitoring":"AC","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","During Transport":"-40 ... +85 °C","Fastening Method":"snap-on mounting","Full-Scale Value":"1","Product Function":"Phase monitoring relay","Delayed Switching":"2","Mounting Position":"any","Product Brand Name":"SIRIUS","Asymmetry Detection":"Yes; not adjustable, indirectly by monitoring the voltage limit values","Between The Outputs":"Yes","Degree Of Pollution":"3","Product Designation":"Network monitoring relay with digital setting","at AWG cables solid":"2x (20 ... 14)","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":"160 ... 690 V","at 60 Hz rated value":"160 ... 690 V","Design Of The Display":"LCD","Design Of The Product":"5 functions","Overvoltage Detection":"Yes","For Auxiliary Contacts":"2","Undervoltage Detection":"Yes","at AWG cables stranded":"2x (20 ... 14)","Phase Failure Detection":"Yes","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":"AC","Overvoltage Detection 3 Phase":"Yes","Substance Prohibitance (Date)":"05/01/2012","Type Of Electrical Connection":"screw-type terminals","Undervoltage Detection 3 Phases":"Yes","Voltage Window Recognition 3 Phase":"Yes","With Lower Or Upper Limit Violation":"0.1 ... 20 s","operational current at 17 V minimum":"5 mA","Surge Voltage Resistance Rated Value":"6 kV","With Degree Of Pollution 3 Rated Value":"690 V","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":"0.5 ... 2.5 mm²","Number Of Poles For Main Current Circuit":"3","Tightening Torque With Screw-Type Terminals":"0.8 ... 1.2 N·m","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","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","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","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/3UG4615-1CR20/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings for this phase monitoring relay?","answer":"It monitors 160-690 V AC at 50/60 Hz, has a 3 A output relay at 250/400 V AC, an LCD display, and IP20 protection. It detects undervoltage, overvoltage, phase loss, phase sequence, and asymmetry."},{"question":"Does the 3UG4615-1CR20 have an auto-reset function?","answer":"Yes, auto-reset is selectable, with a configurable delay of 2 seconds before re-energizing the output after a fault clears."},{"question":"What compliance documentation is available for this relay?","answer":"As a Siemens SIRIUS product, it carries CE, UL, CSA, and CCC approvals. RoHS and REACH declarations are available on request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3UG4615-1CR20","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/3UG4615-1CR20 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}}