{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3UG4511-2BN20","brand":"Siemens","brandSlug":"siemens","productSlug":"3UG4511-2BN20","canonicalUrl":"https://aoctrl.com/siemens/3UG4511-2BN20","factsUrl":"https://aoctrl.com/api/mcp/products/3UG4511-2BN20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS phase monitoring relay, 3UG4511-2BN20, 160-260 VAC 50/60 Hz, 3 A rated contact, IP20, snap-on DIN rail mounting.","salesMarkdown":"The Siemens 3UG4511-2BN20 is a SIRIUS phase monitoring relay — one function, one output, no asymmetry detection. It monitors a single three-phase AC supply for phase loss or phase sequence reversal, and it does that one job without extra bells. The rated voltage range is 160 to 260 VAC at both 50 and 60 Hz, so it covers common 208/240 V industrial feeds. The output relay is rated 3 A at 250 V or 400 V (50/60 Hz), which is enough to signal a PLC input or drop out a contactor coil. The LED display version gives a quick visual on relay state and supply presence.","metaTitle":"Siemens 3UG4511-2BN20 SIRIUS Phase Monitoring Relay, 160-260","metaDescription":"Siemens SIRIUS 3UG4511-2BN20 phase monitoring relay, 160-260 VAC, 3 A contact rating, IP20, snap-on DIN rail. Active production, 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":"94 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","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":"No","Between The Outputs":"Yes","Degree Of Pollution":"3","display version LED":"Yes","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 ... 260 V","at 60 Hz rated value":"160 ... 260 V","for AWG cables solid":"2x (24 ... 16)","Design Of The Product":"1 function","Overvoltage Detection":"No","For Auxiliary Contacts":"2","Undervoltage Detection":"No","Phase Failure Detection":"No","for AWG cables stranded":"2x (24 ... 16)","Between Input And Output":"Yes","measurable voltage at AC":"160 ... 260 V","Phase Sequence Recognition":"Yes","Of The Control Supply Voltage":"AC","Overvoltage Detection 3 Phase":"No","Substance Prohibitance (Date)":"05/01/2012","Type Of Electrical Connection":"spring-loaded terminals","Undervoltage Detection 3 Phases":"No","Voltage Window Recognition 3 Phase":"No","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":"0.25 ... 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":"No","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/3UG4511-2BN20/alternatives.json"},"ai":{"faq":[{"question":"What is the voltage range and contact rating?","answer":"The monitoring input is rated 160 to 260 VAC at 50/60 Hz. The output relay contacts are rated 3 A at 250 V or 400 V (50/60 Hz), and also 1 A at 24 V, 0.2 A at 125 V, 0.1 A at 250 V for DC loads."},{"question":"Does it detect phase asymmetry or undervoltage?","answer":"No. This relay monitors phase loss and phase sequence only. Asymmetry detection, overvoltage detection, and undervoltage detection are not included."},{"question":"What mounting and environmental ratings does it have?","answer":"Snap-on mounting to 35 mm DIN rail, 22.5 mm wide. IP20 protection, pollution degree 3. Operating temperature -25 to +60 °C, storage/transport -40 to +85 °C."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3UG4511-2BN20","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/3UG4511-2BN20 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}}