{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3UG4651-1AA30","brand":"Siemens","brandSlug":"siemens","productSlug":"3UG4651-1AA30","canonicalUrl":"https://aoctrl.com/siemens/3UG4651-1AA30","factsUrl":"https://aoctrl.com/api/mcp/products/3UG4651-1AA30","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3UG4651-1AA30, RPM monitoring relay with digital setting, 24 V AC/DC supply, 3 A at 250 V contact rating, IP20, LCD display, auto-reset, error memory.","salesMarkdown":"The Siemens 3UG4651-1AA30 is a SIRIUS RPM monitoring relay with digital setting — a dedicated speed-supervision relay for rotating machinery. It monitors RPM via a sensor input and trips an output if speed deviates outside the set window. Rated supply is 24 V AC/DC (24... 24 V at 50/60 Hz). Contact rating: 3 A at 250 V AC (50/60 Hz), with lower ratings at 125 V (0.2 A) and 24 V (1 A). The coil draws a maximum of 2.5 VA at 24 V. The relay offers auto-reset and error memory, plus an external reset input. Start-up delay is adjustable from 1 to 900 seconds. Initial value is 1.1. Delayed switching is set to 0 (instantaneous). Mounting position is any; fastening is by screw or snap-on onto a DIN rail. For BOM freeze or PCN watch, this part is a stable line item. Sourcing is straightforward via RFQ; no last-time-buy or obsolescence risk is flagged. Width is 22.5 mm, depth 102 mm, height 86 mm — a standard single-module DIN-rail footprint. Screw and snap-on mounting fits any standard rail. Mounting position is unrestricted. Terminals accept solid or stranded wire: 2x (20... 14) AWG solid, 20... 14 AWG stranded. Strip length and torque are per standard Siemens practice for this terminal class. Clearance distances: upwards, forwards, backwards, downwards, and at the side all 0 mm — no additional clearance required beyond the module envelope. ## Display and diagnostics An LCD display shows setpoint and actual RPM values, plus fault codes. The digital setting allows precise adjustment without a potentiometer. Error memory retains the last fault after power loss.","metaTitle":"Siemens 3UG4651-1AA30 SIRIUS RPM Monitoring Relay, 24 V, 3 A","metaDescription":"Siemens 3UG4651-1AA30 SIRIUS RPM monitoring relay with digital setting, 24 V supply, 3 A contact rating, IP20, LCD display, auto-reset, error memory. Current lifecycle stage.","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 ... 24 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":"2.5 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","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 ... 24 V","at 60 Hz rated value":"24 ... 24 V","for AWG cables solid":"2x (20 ... 14)","Design Of The Display":"LCD","Instantaneous Contact":"0","Standstill Monitoring":"No","for 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/3UG4651-1AA30/alternatives.json"},"ai":{"faq":[{"question":"Does the 3UG4651-1AA30 have auto-reset and error memory?","answer":"Yes, auto-reset is enabled, and error memory retains the last fault after power loss. An external reset input is also available."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3UG4651-1AA30","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/3UG4651-1AA30 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}}