{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3UG4631-1AA30","brand":"Siemens","brandSlug":"siemens","productSlug":"3UG4631-1AA30","canonicalUrl":"https://aoctrl.com/siemens/3UG4631-1AA30","factsUrl":"https://aoctrl.com/api/mcp/products/3UG4631-1AA30","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3UG4631-1AA30, voltage monitoring relay with digital setting, 24 V AC/DC, 22.5 mm width, IP20, snap-on mounting.","salesMarkdown":"The Siemens SIRIUS 3UG4631-1AA30 is a voltage monitoring relay with digital setting, designed to detect both overvoltage and undervoltage conditions on AC/DC systems. It operates from a 24 V rated supply (50/60 Hz) and fits a standard 22.5 mm DIN-rail slot with snap-on mounting — no tools needed for installation. The LCD display shows the measured value and setpoint, making commissioning straightforward without a separate meter. The 24 V rated supply is the relay's own operating voltage — not the monitored circuit. The measurable voltage range on AC starts at 0.1 V up to 60 V, so this relay is suited for low-voltage AC/DC monitoring, not 400 V mains. The output contacts are rated 1 A at 24 V, 0.2 A at 125 V, and 0.1 A at 250 V — these are signal-level switching capacities, not motor-load contacts. Use them to drive a PLC input, alarm annunciator, or contactor coil via an interposing relay if needed. The 22.5 mm width matches standard terminal-block spacing, so it fits neatly alongside other SIRIUS control gear. IP20 means finger-safe terminals but no protection against moisture — install inside a panel with at least IP54 enclosure. Wire termination accepts solid or stranded conductors 20–14 AWG, two per terminal.","metaTitle":"Siemens SIRIUS 3UG4631-1AA30 Voltage Monitoring Relay, 24 V","metaDescription":"Siemens SIRIUS 3UG4631-1AA30 voltage monitoring relay with digital setting, 24 V AC/DC rated, 22.5 mm wide, IP20, snap-on mounting. 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","Rated Value":"24 V","Initial Value":"0.85","During Storage":"-40 ... +85 °C","External Reset":"Yes","For Monitoring":"AC/DC","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","During Transport":"-40 ... +85 °C","Fastening Method":"snap-on mounting","Full-Scale Value":"1.15","Product Function":"Voltage monitoring relay","Mounting Position":"any","Product Brand Name":"SIRIUS","Between The Outputs":"Yes","Product Designation":"Voltage monitoring relay with digital setting","at AWG cables solid":"2x (20 ... 14)","protection class IP":"IP20","at 50 Hz rated value":"24 V","at 60 Hz rated value":"24 V","Design Of The Display":"LCD","Overvoltage Detection":"Yes","Undervoltage Detection":"Yes","at AWG cables stranded":"2x (20 ... 14)","Between Input And Output":"Yes","Relative Repeat Accuracy":"1 %","measurable voltage at AC":"0.1 ... 60 V","measurable voltage at DC":"0.1 ... 60 V","overvoltage detection DC":"Yes","Measurable Line Frequency":"40 ... 500 Hz","undervoltage detection DC":"Yes","Accuracy Of Digital Display":"+/-1 digit","Relative Metering Precision":"5 %","Of The Control Supply Voltage":"AC/DC","Overvoltage Detection 1 Phase":"Yes","Overvoltage Detection 3 Phase":"No","Substance Prohibitance (Date)":"05/01/2012","Type Of Electrical Connection":"screw-type terminals","voltage window recognition DC":"Yes","Undervoltage Detection 1 Phase":"Yes","Undervoltage Detection 3 Phases":"No","Design Of The Electrical Isolation":"Protective separation","Voltage Window Recognition 1 Phase":"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":"4 kV","Between Control And Auxiliary Circuit":"300 V","With Degree Of Pollution 3 Rated Value":"690 V","Between Auxiliary And Auxiliary Circuit":"300 V","due to burst according to IEC 61000-4-4":"2 kV","number of CO contacts delayed switching":"1","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":"1","Tightening Torque With Screw-Type Terminals":"1.2 ... 0.8 N·m","shock resistance according to IEC 60068-2-27":"sinusoidal half-wave 15g / 11 ms","Between The Voltage Supply And Other Circuits":"No","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","Relative Temperature-Related Measurement Deviation":"0.1 %","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/3UG4631-1AA30/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings for this voltage monitoring relay?","answer":"Rated supply voltage 24 V AC/DC. Monitors overvoltage and undervoltage on AC/DC circuits. Output contacts rated 1 A at 24 V, 0.2 A at 125 V, 0.1 A at 250 V. Repeat accuracy 1 %."},{"question":"What is the physical size and mounting?","answer":"Width 22.5 mm, height 92 mm, depth 91 mm. Snap-on mounting to 35 mm DIN rail, any position. IP20 protection."},{"question":"Can the 3UG4631-1AA30 replace a 6ES7221-1BH32-0XB0 in a panel?","answer":"No — the 6ES7221-1BH32-0XB0 is a Siemens S7-1200 digital input module, a completely different product class (PLC I/O vs. voltage monitoring relay). They are not electrically or mechanically interchangeable."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3UG4631-1AA30","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/3UG4631-1AA30 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}}