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Siemens 3RF2900-0EA18 — Solid State Relays

Siemens 3RF2900-0EA18 SIRIUS Solid-State Relay, 22.5 mm, 24

MPN3RF2900-0EA18
Active

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.

$255.77Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RF2900-0EA18 — Identification
ParameterValue
Product designationconverter
3RF2900-0EA18 — Contacts & Poles
ParameterValue
Main circuit poles0
Main NO contacts (count)0
Auxiliary NO contacts (count)0
Auxiliary NC contacts (count)0
3RF2900-0EA18 — Connection & Mechanical
ParameterValue
Fastening / mounting methodclip-on

Product details

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.

Frequently asked questions

What are the key ratings for the 3RF2900-0EA18?

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.

What compliance documentation does this part carry?

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.

MPN
3RF2900-0EA18