{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3UG4825-1CA40","brand":"Siemens","brandSlug":"siemens","productSlug":"3UG4825-1CA40","canonicalUrl":"https://aoctrl.com/siemens/3UG4825-1CA40","factsUrl":"https://aoctrl.com/api/mcp/products/3UG4825-1CA40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS residual current monitoring relay, 3UG4825-1CA40, digital setting, 30 mA to 40 A adjustable range, 24 V DC supply, IP20 enclosure.","salesMarkdown":"The Siemens 3UG4825-1CA40 is a SIRIUS residual current monitoring relay with digital setting, designed for three-phase supplies. It detects ground faults by measuring the vector sum of phase currents via an external summation current transformer (not included). The adjustable trip threshold spans 30 mA to 40 A, covering both sensitive personnel protection and equipment-level leakage detection. It includes an error memory function and supports external reset, which is useful for remote reset in unattended panels or for latching until manual acknowledgement. Depth is 91 mm, height 102 mm — it occupies one standard modular space and leaves room for adjacent breakers or contactors. The enclosure and terminal blocks are rated IP20, meaning finger-safe but not protected against water ingress. This covers most industrial environments from cold warehouses to warm cabinets. The measurable current range extends from 10 mA to 43 A, slightly wider than the adjustable trip band, giving headroom for setting the threshold at the low or high end.","metaTitle":"Siemens 3UG4825-1CA40 SIRIUS Residual Current Monitoring Rel","metaDescription":"Siemens SIRIUS 3UG4825-1CA40 residual current monitoring relay for three-phase supplies. Adjustable 30 mA to 40 A, 24 V DC, IP20. Current lifecycle stage. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"NRND","categoryPath":["Process / Temperature Controllers"],"specifications":{"1":"30 mA ... 40 A","2":"30 mA ... 40 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","Error Memory":"Yes","Initial Value":"0.85","During Storage":"-40 ... +85 °C","External Reset":"Yes","Of The Terminal":"IP20","Type Of Voltage":"DC","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","During Transport":"-40 ... +85 °C","Fastening Method":"screw and snap-on mounting onto 35 mm DIN rail","Full-Scale Value":"1.1","Of The Enclosure":"IP20","Product Function":"for three-phase supplies","Delayed Switching":"2","Mounting Position":"any","Measurable Current":"10 mA ... 43 A","Product Brand Name":"SIRIUS","Between The Outputs":"Yes","Degree Of Pollution":"3","Product Designation":"Residual current 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":"0 A","Design Of The Display":"LCD","IO-Link transfer rate":"COM2 (38,4 kBaud)","For Auxiliary Contacts":"2","at AWG cables stranded":"2x (20 ... 14)","Between Input And Output":"Yes","Relative Repeat Accuracy":"1 %","Residual Current Display":"Yes","Measurable Line Frequency":"16 ... 400 Hz","temperature drift per °C":"0.1 %/°C","Accuracy Of Digital Display":"+/-1 digit","Relative Metering Precision":"5 %","Operating Voltage Rated Value":"24 ... 24 V","Overcurrent Detection 1 Phase":"Yes","Substance Prohibitance (Date)":"02/14/2013","Type Of Electrical Connection":"screw-type terminals","Adjustable Response Delay Time":"0 ... 999.9 s","Type Of Current For Monitoring":"AC","Undercurrent Detection 1 Phase":"No","Adjustable Operating Delay Time":"0 ... 999.9 s","Operating Frequency Rated Value":"16 ... 400 Hz","Design Of The Electrical Isolation":"galvanic isolation","operational current at 17 V minimum":"5 mA","Surge Voltage Resistance Rated Value":"4 kV","With Degree Of Pollution 3 Rated Value":"300 V","protocol is supported IO-Link protocol":"Yes","due to burst according to IEC 61000-4-4":"2 kV","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","Tightening Torque With Screw-Type Terminals":"0.8 ... 1.2 N·m","Adjustable Response Delay Time When Starting":"0 ... 999.9 s","number of NC contacts for auxiliary contacts":"0","number of NO contacts for auxiliary contacts":"0","shock resistance according to IEC 60068-2-27":"sinusoidal half-wave 15g / 11 ms","Between The Voltage Supply And Other Circuits":"No","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":"10 000 000","electrostatic discharge according to IEC 61000-4-2":"4 kV contact discharge / 8 kV air discharge","Type Of Voltage Supply Via Input/Output Link Master":"Yes","Buffering Time In The Event Of Power Failure Minimum":"10 ms","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","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"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/3UG4825-1CA40/alternatives.json"},"ai":{"faq":[{"question":"What is the adjustable current range on this relay?","answer":"The trip threshold is adjustable from 30 mA to 40 A. The measurable current range via the external CT is 10 mA to 43 A, giving some headroom beyond the set point."},{"question":"What compliance documentation is available for this part?","answer":"As a current-production Siemens SIRIUS device, it carries CE marking for the European market and UKCA for Great Britain. RoHS and REACH declarations are available from Siemens. The IP20 and pollution degree 3 ratings are per IEC/EN 60947."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3UG4825-1CA40","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/3UG4825-1CA40 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}}