{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3UG4651-1AW30","brand":"Siemens","brandSlug":"siemens","productSlug":"3UG4651-1AW30","canonicalUrl":"https://aoctrl.com/siemens/3UG4651-1AW30","factsUrl":"https://aoctrl.com/api/mcp/products/3UG4651-1AW30","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS RPM monitoring relay, 3UG4651-1AW30, digital setting, 24-240 VAC/DC, 3 A at 250 V, IP20, 22.5 mm wide.","salesMarkdown":"The 3UG4651-1AW30: The 22.5 mm width and 86 mm height with 102 mm depth fit standard 22.5 mm modular enclosure slots — it snaps onto a DIN rail (screw and snap-on mounting,) in any orientation. Pollution degree 3 allows use in industrial environments with conductive pollution, typical for control cabinets near machinery. The contact rating of 3 A at 250 VAC is the maximum switching capacity for the output relay — sufficient for signaling to a PLC input, driving a small contactor coil, or annunciating an alarm. The auxiliary supply draw is modest: 4 VA at 24 V maximum and 9 VA at 240 V maximum, so it loads the control transformer lightly. The LCD display shows the setpoint and actual speed, making commissioning adjustments straightforward without a separate programmer. ## Setting and reset behavior The relay offers an initial value of 1.1 and a full-scale value of 0.8 — these define the speed threshold window as a ratio of the nominal speed. A start-up delay (when starting) can be set from 1 to 900 seconds to allow the motor to reach operating speed before monitoring begins, avoiding nuisance trips during acceleration. The relay supports auto-reset and external reset, and retains an error memory so the last fault condition is stored even after power loss. Terminals accept solid or stranded wire 20...14 AWG, with 2x (20...14) AWG solid for daisy-chaining. Clearance around the device: 0 mm upwards, forwards, backwards, downwards, and at the side — meaning it can be mounted flush against adjacent devices or panel walls without derating.","metaTitle":"Siemens 3UG4651-1AW30 SIRIUS RPM Monitoring Relay, 24-240 VA","metaDescription":"Siemens SIRIUS 3UG4651-1AW30 RPM monitoring relay with digital setting, 24-240 VAC/DC, 3 A contact rating, IP20, current production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"NRND","categoryPath":["Process / Temperature Controllers"],"specifications":{"Depth":"102 mm","Solid":"20 ... 14","Width":"22.5 mm","Height":"86 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 ... 240 V","Error Memory":"Yes","Initial Value":"1.1","When Starting":"1 ... 900 s","During Storage":"-40 ... +80 °C","External Reset":"Yes","at 24 V maximum":"4 VA","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","During Transport":"-40 ... +80 °C","Fastening Method":"screw and snap-on mounting","Full-Scale Value":"0.8","Product Function":"RPM monitoring relay","at 240 V maximum":"9 VA","Delayed Switching":"0","Mounting Position":"any","Product Brand Name":"SIRIUS","Between The Outputs":"No","Degree Of Pollution":"3","Product Designation":"Speed monitoring relay with digital setting","at AWG cables solid":"2x (20 ... 14)","protection class IP":"IP20","at 250 V at 50/60 Hz":"3 A","at 50 Hz rated value":"24 ... 240 V","at 60 Hz rated value":"24 ... 240 V","Design Of The Display":"LCD","Instantaneous Contact":"0","Standstill Monitoring":"No","at AWG cables stranded":"2x (20 ... 14)","Between Input And Output":"Yes","Relative Repeat Accuracy":"1 %","Measurable Line Frequency":"50 ... 60 Hz","Rotation Speed Monitoring":"Yes","Accuracy Of Digital Display":"+/- 1 Digit","Relative Metering Precision":"10 %","Substance Prohibitance (Date)":"05/01/2012","Type Of Electrical Connection":"screw-type terminals","Design Of Input Feedback Input":"No","With Lower Or Upper Limit Violation":"0.1 ... 99.9 s","operational current at 17 V minimum":"5 mA","Surge Voltage Resistance Rated Value":"4 kV","With Degree Of Pollution 3 Rated Value":"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","Suitability For Use Safety-Related Circuits":"No","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","Type Of Voltage Of The Control Supply Voltage":"AC/DC","operating frequency with 3RT2 contactor maximum":"5 000 1/h","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","Buffering Time In The Event Of Power Failure Minimum":"10 ms","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","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/3UG4651-1AW30/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings for this RPM monitoring relay?","answer":"Supply voltage 24-240 VAC/DC, contact rating 3 A at 250 VAC, width 22.5 mm, IP20, operating temperature -25 to +60 °C."},{"question":"What is the depth of the 3UG4651-1AW30?","answer":"The depth is 102 mm."},{"question":"What wire sizes does the 3UG4651-1AW30 accept?","answer":"Solid or stranded wire 20...14 AWG, with 2x (20...14) AWG solid for looping through."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3UG4651-1AW30","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/3UG4651-1AW30 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}}