The Siemens 3RN2010-2CW30 is a SIRIUS 3RN2 thermistor motor protection relay — a compact evaluation unit designed for bimetallic switch sensors. It monitors motor winding temperature via PTC thermistors and trips the output when the threshold is exceeded, with auto-reset once the fault clears. Supply voltage covers 24 to 240 V AC/DC at both 50 and 60 Hz, making it usable across global line voltages without a separate power supply module. The output relay is rated 1 A at 24 V, 0.2 A at 125 V, and 0.15 A at 240 V — enough to drive a contactor coil or PLC input directly. Housed in a 17.5 mm wide, 100 mm tall, 90 mm deep enclosure with IP20 protection. The device includes an LED display for status indication.
Siemens 3RN2010-2CW30 Thermistor Motor Protection Relay, 24-
MPN3RN2010-2CW30
Active
Siemens SIRIUS 3RN2 thermistor motor protection relay, 3RN2010-2CW30, 24-240 VAC/DC, 1 A at 24 V, IP20, screw and snap-on 35 mm DIN rail.
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026
Specifications
| Parameter | Value |
|---|---|
| Product function | thermistor motor protection |
| Product designation | Thermistor motor protection relay |
| Product line / brand name | SIRIUS |
| Parameter | Value |
|---|---|
| Rated value (50 Hz) | 24 ... 240 V |
| Rated value (60 Hz) | 24 ... 240 V |
| Parameter | Value |
|---|---|
| Electrical connection type | spring-loaded terminal (push-in) |
| Parameter | Value |
|---|---|
| Ingress protection (IP rating), wired | IP20 |
| Installation altitude, max. | 2 000 m |
| Parameter | Value |
|---|---|
| Fastening method | screw and snap-on mounting onto 35 mm DIN rail |
| Mounting position | any |
| Width | 17.5 mm |
| Height | 100 mm |
| Depth | 90 mm |
| Conductor cross-section, solid | 20 ... 12 |
| Conductor cross-section, finely stranded (with ferrule) | 0.5 ... 2.5 mm² |
| Mounting clearance, top | 0 mm |
| Mounting clearance, rear | 0 mm |
| Mounting clearance, side | 0 mm |
| Mounting clearance, front | 0 mm |
Product details
Frequently asked questions
What are the key ratings of the 3RN2010-2CW30?
Supply voltage 24–240 V AC/DC, output relay rated 1 A at 24 V, 0.2 A at 125 V, and 0.15 A at 240 V. Enclosure is IP20, 17.5 mm wide, mounts on 35 mm DIN rail.
What compliance documentation is available for the 3RN2010-2CW30?
The part carries IP20 protection class. RoHS, REACH, UL, and IEC compliance are standard for Siemens SIRIUS products, but specific declarations should be confirmed at time of order against the RFQ.
MPN
3RN2010-2CW30