{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RF2900-0EA18","brand":"Siemens","brandSlug":"siemens","productSlug":"3RF2900-0EA18","canonicalUrl":"https://aoctrl.com/siemens/3RF2900-0EA18","factsUrl":"https://aoctrl.com/api/mcp/products/3RF2900-0EA18","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RF2 solid-state relay / contactor, order code 3RF2900-0EA18, 22.5 mm width, 24 V AC/DC control, clip-on DIN rail mounting.","salesMarkdown":"It handles 24 V AC/DC control voltage, drawing 25 mA on either supply type, so it works with both PLC digital outputs and conventional control transformers without worrying about polarity or supply frequency. At 22.5 mm wide, it fits a standard single-module slot in a control panel. The clip-on fastening means you snap it onto the DIN rail without tools — no mounting screws, no bracket. ## Control Circuit and Wiring Control supply voltage range is 18 to 30 V DC, with a nominal 24 V AC/DC rating at 50/60 Hz. The 25 mA control current is consistent across AC and DC, so the load on your control transformer or PLC output is predictable — no inrush spike to account for. Screw-type terminals on the auxiliary and control circuit accept 1x (0.5 to 2.5 mm²) solid or 2x (0.5 to 1.0 mm²) finely stranded wire, with or without ferrule. AWG 20 to 12 for the control contacts. The part has zero main contacts and zero auxiliary contacts — it's a converter module, not a contactor with power poles. Its job is to switch the control signal, not the load current. Derating begins at 40 °C — above that, you'll need to reduce the load or improve ventilation. Vibration resistance 2g per IEC 60068-2-6; shock resistance 15g / 11 ms per IEC 60068-2-27. EMC immunity includes 4 kV contact / 8 kV air electrostatic discharge (IEC 61000-4-2, criterion 2) and 2 kV burst at 5 kHz (IEC 61000-4-4, criterion 2). RoHS compliance with substance prohibition date of July 1, 2006.","metaTitle":"Siemens 3RF2900-0EA18 SIRIUS Solid-State Relay, 22.5 mm, 24","metaDescription":"Siemens 3RF2900-0EA18 SIRIUS solid-state relay/contactor, 22.5 mm wide, 24 V AC/DC control, 25 mA draw, clip-on DIN mount. Active production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Solid State Relays"],"specifications":{"Depth":"38 mm","Solid":"1x (0.5 ... 2.5 mm²), 2x (0.5 ... 1.0 mm²)","Width":"22.5 mm","title":"3RF2900-0EA18","Height":"83.5 mm","description":"converter control voltage 24 V AC/DC for semiconductor relay / contactor","During Storage":"-55 ... +80 °C","Type Of Voltage":"AC/DC","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"clip-on","Product Function":"solid-state relay / solid-state contactor 3RF2","at DC rated value":"24 V","Product Brand Name":"SIRIUS","Degree Of Pollution":"3","Product Designation":"converter","Derating Temperature":"40 °C","at 50 Hz rated value":"24 V","at 60 Hz rated value":"24 V","Side-By-Side Mounting":"Yes","Substance Prohibitance (Date)":"07/01/2006","Operating Frequency Rated Value":"50 ... 60 Hz","For Auxiliary And Control Circuit":"screw-type terminals","control current at AC rated value":"25 mA","control current at DC rated value":"25 mA","Symmetrical Line Frequency Tolerance":"5 Hz","reference code according to EN 61346-2":"T","due to burst according to IEC 61000-4-4":"2 kV / 5 kHz behavior criterion 2","number of NC contacts for main contacts":"0","number of NO contacts for main contacts":"0","reference code according to IEC 81346-2":"T","Finely Stranded With Core End Processing":"1x (0.5 ... 2.5 mm²), 2x (0.5 ... 1.0 mm²)","Number Of Poles For Main Current Circuit":"0","control supply voltage at DC rated value":"18 ... 30 V","Finely Stranded Without Core End Processing":"1x (0.5 ... 2.5 mm²), 2x (0.5 ... 1.0 mm²)","number of CO contacts for auxiliary contacts":"0","number of NC contacts for auxiliary contacts":"0","number of NO contacts for auxiliary contacts":"0","shock resistance according to IEC 60068-2-27":"15g / 11 ms","vibration resistance according to IEC 60068-2-6":"2g","at AWG cables for auxiliary and control contacts":"1x (AWG 20 ... 12)","electrostatic discharge according to IEC 61000-4-2":"4 kV contact discharging / 8 kV air discharging, behavior criterion 2","Installation Altitude At Height Above Sea Level Maximum":"1 000 m","conducted HF interference emissions according to CISPR11":"Class A for industrial environment","Relative Symmetrical Tolerance Of The Operating Frequency":"10 %","field-bound HF interference emission according to CISPR11":"Class B for the domestic, business and commercial environments","Stripped Length Of The Cable For Auxiliary And Control Contacts":"7 mm","Supply Voltage Frequency For Auxiliary And Control Circuit Rated Value":"50 ... 60 Hz","Tightening Torque For Auxiliary And Control Contacts With Screw-Type Terminals":"0.5 ... 0.6 N·m","Design Of The Thread Of The Connection Screw Of The Auxiliary And Control Contacts":"M3","Tightening Torque [Lbf·In] For Auxiliary And Control Contacts With Screw-Type Terminals":"4.5 ... 5.3 lbf·in"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$255.77","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/d8d9c58f923ae8c46f7023449a4f5434.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=505271&mlfb=3RF2900-0EA18"},"ai":{"faq":[{"question":"What are the key ratings for the 3RF2900-0EA18?","answer":"Control voltage 24 V AC/DC (range 18–30 V DC), control current 25 mA on AC or DC, 22.5 mm wide, clip-on DIN rail mount, screw terminals accepting 0.5–2.5 mm² solid or 0.5–1.0 mm² stranded, operating temperature -25 to +60 °C."},{"question":"What compliance documentation does this part carry?","answer":"RoHS compliant with substance prohibition date July 1, 2006. EMC immunity tested to IEC 61000-4-2 (ESD) and IEC 61000-4-4 (burst). Pollution degree 3 rated. No specific UL or CSA listing appears in the record."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RF2900-0EA18","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/3RF2900-0EA18 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}