{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3UG4633-1AL30","brand":"Siemens","brandSlug":"siemens","productSlug":"3UG4633-1AL30","canonicalUrl":"https://aoctrl.com/siemens/3UG4633-1AL30","factsUrl":"https://aoctrl.com/api/mcp/products/3UG4633-1AL30","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3UG4633-1AL30 voltage monitoring relay, 17-275 V AC/DC, overvoltage and undervoltage detection, LCD display, IP20, 22.5 mm width.","salesMarkdown":"The Siemens SIRIUS 3UG4633-1AL30 is a voltage monitoring relay with digital setting, designed to keep a close watch on single-phase AC/DC supplies from 17 to 275 V at 50/60 Hz. The relay output is a single changeover contact rated 1 A at 24 V, 0.2 A at 125 V, and 0.1 A at 250 V — enough to signal a PLC input or drive a small contactor coil. The LCD display gives you a local readout of the measured voltage and parameter settings, which is handy during commissioning or fault-finding without needing a meter. The 17-275 V AC/DC rated range covers most standard control voltages in industrial panels — 24 VDC, 48 V, 110 V, 230 V — without needing a different relay for each. The 1 % repeat accuracy means if you set the undervoltage trip at 200 V, it will trip at 200 V every time, not drift 5-10 V with temperature or over time. That matters when you're coordinating with downstream contactor hold-in thresholds or UPS transfer settings. The 22.5 mm width and snap-on mounting (DIN rail) let it fit in a standard 8-module row alongside breakers and contactors. IP20 protection means it's for use inside an enclosure, not out on the wet floor. The relay includes auto-reset and external reset options, and a configurable start-up delay (0.1 to 20 s) to ride through momentary dips during motor starting or generator transfer. That flexibility means it can often replace an older fixed-threshold relay without rewiring the panel.","metaTitle":"Siemens 3UG4633-1AL30 SIRIUS Voltage Monitoring Relay, 17-27","metaDescription":"Siemens SIRIUS 3UG4633-1AL30 voltage monitoring relay, 17-275 V AC/DC, over/undervoltage detection, LCD display, IP20, 1% repeat accuracy. 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":"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":"17 ... 275 V","Initial Value":"1","When Starting":"0.1 ... 20 s","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","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":"17 ... 275 V","at 60 Hz rated value":"17 ... 275 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":"17 ... 275 V","measurable voltage at DC":"17 ... 275 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/3UG4633-1AL30/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings of the 3UG4633-1AL30?","answer":"It monitors 17-275 V AC/DC with overvoltage and undervoltage detection, 1 % repeat accuracy, a single changeover contact rated 1 A at 24 V, and an LCD display. It snaps onto DIN rail (22.5 mm wide) and operates from -25 to +60 °C."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3UG4633-1AL30","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/3UG4633-1AL30 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}}