{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3UG4614-1BR20","brand":"Siemens","brandSlug":"siemens","productSlug":"3UG4614-1BR20","canonicalUrl":"https://aoctrl.com/siemens/3UG4614-1BR20","factsUrl":"https://aoctrl.com/api/mcp/products/3UG4614-1BR20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3UG4614-1BR20, network monitoring relay with digital setting, 160-690 VAC, LCD display, 22.5 mm width, snap-on mounting.","salesMarkdown":"The Siemens SIRIUS 3UG4614-1BR20 is a network monitoring relay with digital setting, purpose-built for phase monitoring on AC supplies. It checks for phase sequence, phase failure, and asymmetry across a 160-690 VAC range at 50 or 60 Hz. The LCD display shows the measured values and settings, and the relay offers adjustable start-up delay (0.1-20 s) plus auto-reset capability, making it a fit for unattended restart scenarios. Rated for 160-690 VAC at 50/60 Hz, this relay covers low-voltage networks from 208 V up to 690 V — common in industrial motor control centers and distribution panels. The output contacts are rated 3 A at 250 VAC and 400 VAC (50/60 Hz), and 1 A at 24 VDC, 0.2 A at 125 VDC, 0.1 A at 250 VDC. For a typical PLC or contactor coil load, the 24 VDC 1 A rating is the one to watch; it's enough for a single small contactor but not for paralleling multiple coils without an interposing relay. The adjustable start-up delay (0.1-20 s) lets you ride through momentary dips or back-feed transients during motor starting. With auto-reset enabled, the relay re-energizes the output once the fault clears, which is standard for conveyors or pumps that can restart without manual intervention. Zero clearance needed on all sides — no ventilation gaps required.","metaTitle":"Siemens SIRIUS 3UG4614-1BR20 Phase Monitoring Relay, 160-690","metaDescription":"Siemens SIRIUS 3UG4614-1BR20 phase monitoring relay, 160-690 VAC, LCD display, asymmetry detection, auto-reset. Active production. Snap-on 22.5 mm. RFQ for pricing.","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","When Starting":"0.1 ... 20 s","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","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":"4 functions","Overvoltage Detection":"No","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":"No","Substance Prohibitance (Date)":"05/01/2012","Type Of Electrical Connection":"screw-type terminals","Undervoltage Detection 3 Phases":"Yes","Voltage Window Recognition 3 Phase":"No","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/3UG4614-1BR20/alternatives.json"},"ai":{"faq":[{"question":"What voltage range does the 3UG4614-1BR20 cover?","answer":"Rated for 160-690 VAC at both 50 and 60 Hz, covering low-voltage networks from 208 V through 690 V."},{"question":"Does the 3UG4614-1BR20 detect phase asymmetry?","answer":"Yes, asymmetry detection is built in, protecting motors from single-phasing or unbalanced supply."},{"question":"What is the output contact rating at 24 VDC?","answer":"1 A at 24 VDC, suitable for switching a single small contactor or PLC input. For higher loads, use an interposing relay."},{"question":"How do I source the 3UG4614-1BR20?","answer":"It's a current-production Siemens SIRIUS part. Submit an RFQ for pricing and lead time — we quote to order."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3UG4614-1BR20","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/3UG4614-1BR20 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}}