{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RN2023-2DW30","brand":"Siemens","brandSlug":"siemens","productSlug":"3RN2023-2DW30","canonicalUrl":"https://aoctrl.com/siemens/3RN2023-2DW30","factsUrl":"https://aoctrl.com/api/mcp/products/3RN2023-2DW30","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RN2 thermistor motor protection relay, order code 3RN2023-2DW30, 24-240 V AC/DC rated supply, 2 sensor circuits with open-circuit and short-circuit detection, ATEX approval, IP20, 22.5 mm width.","salesMarkdown":"The Siemens SIRIUS 3RN2023-2DW30 is a thermistor motor protection relay designed for monitoring PTC thermistor (PTC) sensors embedded in motor windings. It evaluates the resistance of up to two sensor circuits and triggers an output relay when the winding temperature exceeds the PTC's rated response threshold, providing both warning and disconnection paths. The unit carries ATEX approval for use in potentially explosive atmospheres, with open-circuit and short-circuit detection active in both sensor circuits. The relay's output contacts are rated 1 A at 24 V, 0.2 A at 125 V, and 0.1 A at 250 V, so for a typical 24 V DC control loop the contact can switch a PLC digital input or a contactor coil directly. Galvanic isolation between the outputs prevents fault propagation between the warning and disconnection circuits. The rated supply range of 24... 240 V AC/DC means the relay accepts any control voltage commonly found in industrial panels — 24 V DC, 48 V, 110 V, 230 V — without needing a separate power supply module. The initial value of 0.85 and full-scale value of 1.1 define the PTC resistance thresholds: the relay trips when the PTC resistance exceeds 1.1 times the nominal cold resistance, and resets when it drops below 0.85 times that value. This hysteresis prevents chattering around the trip point. MTBF is listed at 97 a and MTTFd at 303 a, indicating a low failure rate suitable for continuous-duty applications where unplanned downtime is costly. The relay supports auto-reset and external reset, and includes a non-volatile error memory that retains the last fault even after a power cycle — useful for diagnosing intermittent over-temperature events. The 22.5 mm width and any-position mounting simplify integration into crowded DIN-rail assemblies. The LED display provides local status indication for the two sensor circuits and the output relay state.","metaTitle":"Siemens 3RN2023-2DW30 SIRIUS thermistor motor protection rel","metaDescription":"Siemens SIRIUS 3RN2023-2DW30 thermistor motor protection relay. ATEX approved, 2 sensor circuits, open/short detection. 24-240 V AC/DC supply. MTBF 97 a. Current production. Source","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Process / Temperature Controllers"],"specifications":{"MTBF":"97 a","Depth":"90 mm","MTTFd":"303 a","Solid":"20 ... 12","Width":"22.5 mm","Height":"100 mm","Upwards":"0 mm","at 24 V":"1 A","Forwards":"0 mm","Stranded":"20 ... 12","at 125 V":"0.2 A","at 240 V":"0.2 ms","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":"0.85","During Storage":"-40 ... +85 °C","External Reset":"Yes","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","Product Category":"SIRIUS 3RN2 thermistor motor protection","Product Function":"thermistor motor protection","Mounting Position":"any","Product Brand Name":"SIRIUS","Between The Outputs":"Yes","Degree Of Pollution":"3","Product Designation":"Thermistor motor protection relay","display version LED":"Yes","protection class IP":"IP20","at 50 Hz rated value":"24 ... 240 V","at 60 Hz rated value":"24 ... 240 V","for AWG cables solid":"20 ... 12","Design Of The Product":"Standard evaluation unit with ATEX approval and 2 sensor circuits for warning and disconnection, open-circuit and short-circuit detection in both sensor circuits, safe disconnection, non-volatile","for AWG cables stranded":"20 ... 12","Between Input And Output":"Yes","Relative Metering Precision":"2 %","Safe failure fraction (SFF)":"74 %","Substance Prohibitance (Date)":"05/28/2009","Type Of Electrical Connection":"spring-loaded terminal (push-in)","Dynamic Open-Circuit Detection":"Yes","Material Of Switching Contacts":"AgSnO2","Operating Frequency Rated Value":"50 ... 60 Hz","For Auxiliary And Control Circuit":"spring-loaded terminals (push-in)","Design Of The Electrical Isolation":"Protective separation","Relative Humidity During Operation":"70 %","Surge Voltage Resistance Rated Value":"6 kV","category according to EN ISO 13849-1":"1","Between Control And Auxiliary Circuit":"300 V","Explosion Protection Category For Gas":"[Ex e] [Ex d] [Ex px]","Explosion Protection Category For Dust":"[Ex t] [Ex p]","Between Auxiliary And Auxiliary Circuit":"300 V","due to burst according to IEC 61000-4-4":"2 kV (power ports) / 1 kV (signal ports)","reference code according to IEC 81346-2":"K","Finely Stranded With Core End Processing":"0.5 ... 2.5 mm²","average diagnostic coverage level (DCavg)":"18 %","Finely Stranded Without Core End Processing":"0.5 ... 4 mm²","number of CO contacts for auxiliary contacts":"1","number of NC contacts for auxiliary contacts":"0","number of NO contacts for auxiliary contacts":"1","shock resistance according to IEC 60068-2-27":"11g / 15 ms","Between The Voltage Supply And Other Circuits":"Yes","Type Of Voltage Of The Control Supply Voltage":"AC/DC","hardware fault tolerance according to IEC 61508":"0","vibration resistance according to IEC 60068-2-6":"10 ... 55 Hz: 0.35 mm","PFHD with high demand rate according to EN 62061":"3.76E-7 1/h","At Rate Of Recognizable Hazardous Failures (λDd)":"6.8E-8 1/h","Mechanical Service Life (Operating Cycles) Typical":"10 000 000","PFDavg with low demand rate according to IEC 61508":"0.0041","electrostatic discharge according to IEC 61000-4-2":"6 kV contact discharge / 8 kV air discharge","performance level (PL) according to EN ISO 13849-1":"c","Buffering Time In The Event Of Power Failure Minimum":"30 ms","At Rate Of Non-Recognizable Hazardous Failures (λDu)":"3.08E-7 1/h","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":"6 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/3RN2023-2DW30/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings of the 3RN2023-2DW30?","answer":"Supply voltage: 24... 240 V AC/DC (50/60 Hz). Output contact ratings: 1 A at 24 V, 0.2 A at 125 V, 0.1 A at 250 V. MTBF: 97 a. MTTFd: 303 a. Operating temperature: -25... +60 °C. Width: 22.5 mm. IP20 enclosure. ATEX approved with two sensor circuits and open/short detection."},{"question":"What compliance documentation is available for the 3RN2023-2DW30?","answer":"The part carries ATEX approval for use in potentially explosive atmospheres. It is rated IP20 and pollution degree 3. Standard Siemens documentation includes the declaration of conformity, CE marking, and RoHS/REACH compliance data available on request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RN2023-2DW30","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/3RN2023-2DW30 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}}