{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3UG4651-2AW30","brand":"Siemens","brandSlug":"siemens","productSlug":"3UG4651-2AW30","canonicalUrl":"https://aoctrl.com/siemens/3UG4651-2AW30","factsUrl":"https://aoctrl.com/api/mcp/products/3UG4651-2AW30","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS RPM monitoring relay, 3UG4651-2AW30, 24-240 VAC/DC supply, 3 A @ 250 V, IP20, LCD display.","salesMarkdown":"The Siemens SIRIUS 3UG4651-2AW30 is a speed monitoring relay with digital setting, purpose-built to track RPM on rotating machinery and trip when the shaft speed strays outside the programmed window. It runs on a universal control supply of 24 to 240 V AC/DC, so it drops into panels with mixed voltage rails without needing a separate power module. The relay output is rated 3 A at 250 V AC — enough to directly switch a contactor coil or a small motor starter. ## Configuration and wiring notes Terminal screws accept two conductors per clamp. The LCD display shows the actual RPM and the setpoint during programming. Auto-reset and error memory are both available, so the relay can either latch on fault or self-recover when speed returns to normal. External reset input lets a PLC or pushbutton clear the fault remotely. Start-up delay adjustable 1 to 900 seconds avoids nuisance trips during motor acceleration.","metaTitle":"Siemens SIRIUS 3UG4651-2AW30 RPM Monitoring Relay, 24-240 VA","metaDescription":"Siemens SIRIUS 3UG4651-2AW30 RPM monitoring relay, 24-240 VAC/DC, 3 A @ 250 V, IP20. Current lifecycle status. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"NRND","categoryPath":["Process / Temperature Controllers"],"specifications":{"Depth":"103 mm","Solid":"24 ... 16","Width":"22.5 mm","Height":"86 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","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","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","for AWG cables solid":"2x (24 ... 16)","Design Of The Display":"LCD","Instantaneous Contact":"0","Standstill Monitoring":"No","for AWG cables stranded":"2x (24 ... 16)","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":"spring-loaded 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":"0.25 ... 1.5 mm²","Finely Stranded Without Core End Processing":"0.25 ... 1.5 mm²","Suitability For Use Safety-Related Circuits":"No","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/3UG4651-2AW30/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3UG4651-2AW30","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/3UG4651-2AW30 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}}