{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3UG4841-1CA40","brand":"Siemens","brandSlug":"siemens","productSlug":"3UG4841-1CA40","canonicalUrl":"https://aoctrl.com/siemens/3UG4841-1CA40","factsUrl":"https://aoctrl.com/api/mcp/products/3UG4841-1CA40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3UG4841-1CA40 active power monitoring relay, 0.2-10 A measuring range, LCD display, IO-Link COM2, IP20, snap-on 22.5 mm.","salesMarkdown":"The 3UG4841-1CA40: The measuring range of 0.2 to 10 A covers most small-to-medium motor and resistive loads in control panels. The relay's contact is rated 3 A at 250 V and 400 V at 50/60 Hz, which is enough to switch a contactor coil or PLC input directly. The LCD display shows the measured cos phi and the setpoint, so a commissioning engineer can verify the trip point without a meter. The 102 mm height and 91 mm depth leave room for wiring ducts above and below. Terminal blocks accept 2 x 20-14 AWG solid or stranded, so paralleling a feed-through is straightforward. Mounting position is any, which helps when the panel layout is tight. IP20 protection means it's for use inside an enclosure only — no washdown or dust exposure. Pollution degree 2 is the standard for a clean, dry control cabinet. ## IO-Link and reset IO-Link COM2 (38.4 kBaud) is built in, so the relay can report its measured values and status to a master without extra analog wiring. The external reset input (Yes) allows a remote pushbutton or PLC output to clear latched faults, which is useful for unmanned stations. The start-up delay (0 to 999.9 s) lets you skip the inrush period of a large motor or transformer.","metaTitle":"Siemens 3UG4841-1CA40 SIRIUS Power Factor Relay, 0.2-10 A","metaDescription":"Siemens SIRIUS 3UG4841-1CA40 active power monitoring relay, 0.2-10 A measuring range, IP20, LCD display, IO-Link. Current production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"NRND","categoryPath":["Process / Temperature Controllers"],"specifications":{"1":"0.2 ... 10 A","2":"0.2 ... 10 A","Depth":"91 mm","Solid":"20 ... 14","Width":"22.5 mm","Height":"102 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","At The Side":"0 mm","Rated Value":"24 ... 24 V","Initial Value":"0.75","When Starting":"0 ... 999.9 s","During Storage":"-40 ... +85 °C","External Reset":"Yes","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","During Transport":"-40 ... +85 °C","Fastening Method":"snap-on mounting","Full-Scale Value":"1.25","Product Function":"Active power monitoring relay","Mounting Position":"any","Measurable Current":"0.2 ... 10 A","Product Brand Name":"SIRIUS","Between The Outputs":"Yes","Degree Of Pollution":"2","Product Designation":"Cos phi 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 400 V at 50/60 Hz":"3 A","at 50 Hz rated value":"0 ... 0 V","at 60 Hz rated value":"0 ... 0 V","Design Of The Display":"LCD","IO-Link transfer rate":"COM2 (38,4 kBaud)","at AWG cables stranded":"2x (20 ... 14)","Between Input And Output":"Yes","Relative Repeat Accuracy":"1 %","Accuracy Of Digital Display":"+/-1 digit","Relative Metering Precision":"10 %","Operating Voltage Rated Value":"90 ... 690 V","Overcurrent Detection 1 Phase":"Yes","Substance Prohibitance (Date)":"05/01/2012","Type Of Electrical Connection":"screw-type terminals","Type Of Current For Monitoring":"AC","Undercurrent Detection 1 Phase":"Yes","Control Supply Voltage Rated Value":"30 ... 18","With Lower Or Upper Limit Violation":"0 ... 999.9 s","operational current at 17 V minimum":"10 mA","Supply Voltage Frequency Rated Value":"60 Hz","Surge Voltage Resistance Rated Value":"6 kV","With Degree Of Pollution 2 Rated Value":"690 V","protocol is supported IO-Link protocol":"Yes","due to burst according to IEC 61000-4-4":"2 kV","number of CO contacts delayed switching":"2","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":"Yes","Type Of Voltage Of The Control Supply Voltage":"DC","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","ampacity of the semiconductor output in SIO mode":"200 mA","Mechanical Service Life (Operating Cycles) Typical":"10 000 001","electrostatic discharge according to IEC 61000-4-2":"6 kV contact discharge / 8 kV air discharge","Type Of Voltage Supply Via Input/Output Link Master":"Yes","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Adjustable Switching Hysteresis For Measured Current Value":"0 ... 3 000 mA","Thermal Current Of The Switching Element With Contacts Maximum":"5 A","continuous current of the DIAZED fuse link of the output relay":"4 A","Of The Address Range Of The Inputs With Cyclical Transfer Total":"4 byte","Of The Address Range Of The Outputs With Cyclical Transfer Total":"2 byte","point-to-point cycle time between master and IO-Link device minimum":"10 ms","Product Component Removable Terminal For Auxiliary And Control Circuit":"Yes","Supply Voltage Frequency For Auxiliary And Control Circuit Rated Value":"0 ... 0 Hz"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/3UG4841-1CA40/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings for this relay?","answer":"Measuring range 0.2 to 10 A, contact rating 3 A at 250 V and 400 V at 50/60 Hz, supply voltage 24 V DC, IP20, snap-on 22.5 mm DIN-rail mount, IO-Link COM2, LCD display, external reset, and adjustable start-up delay up to 999.9 s."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3UG4841-1CA40","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/3UG4841-1CA40 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}}