Siemens SIRIUS 3RN2 thermistor motor protection relays: monitor PTC thermistors in the motor winding and disconnect the motor on overtemperature. Compact, standard, bistable and ATEX-approved versions.
Technical data
| Series | 3RN2 |
|---|---|
| Product type | Thermistor motor protection relay (PTC) |
| Sensor | PTC thermistor, bimetallic switch (compact/standard) |
| Contacts | 1 CO, 2 CO, 1 NO + 1 NC or 1 CO + 1 NO |
| Approval | ATEX (3RN2011/12/13/23) |
| Supply | 24 V AC/DC or 24–240 V AC/DC |
| Connection | Screw or spring-loaded (push-in) terminals |
Article numbers
| Version | Contacts | Supply | Screw | Spring-loaded (push-in) |
|---|---|---|---|---|
| Compact, bimetal compatible, auto reset | 1 C/O | 24 V AC/DC | 3RN2000-1AA30 | 3RN2000-2AA30 |
| Compact, bimetal compatible, auto reset | 1 C/O | 24–240 V AC/DC | 3RN2000-1AW30 | 3RN2000-2AW30 |
| Compact, bimetal compatible, auto reset | 1 NO + 1 NC | 24 V AC/DC | 3RN2010-1CA30 | 3RN2010-2CA30 |
| Compact, bimetal compatible, auto reset | 1 NO + 1 NC | 24–240 V AC/DC | 3RN2010-1CW30 | 3RN2010-2CW30 |
| Standard, bimetal compatible, auto reset | 2 C/O | 24 V AC/DC | 3RN2010-1BA30 | 3RN2010-2BA30 |
| Standard, bimetal compatible, auto reset | 2 C/O | 24–240 V AC/DC | 3RN2010-1BW30 | 3RN2010-2BW30 |
| Bistable, open/short-circuit detection, auto/manual/external reset, fault storage | 2 C/O | 24–240 V AC/DC | 3RN2012-1BW31 | 3RN2012-2BW31 |
| ATEX approved, open/short-circuit detection, manual/external reset | 2 C/O | 24 V AC/DC | 3RN2011-1BA30 | 3RN2011-2BA30 |
| ATEX approved, open/short-circuit detection, manual/external reset | 2 C/O | 24–240 V AC/DC | 3RN2011-1BW30 | 3RN2011-2BW30 |
| ATEX approved, non-volatile, auto/manual/external reset | 2 C/O | 24 V AC/DC | 3RN2012-1BA30 | 3RN2012-2BA30 |
| ATEX approved, non-volatile, auto/manual/external reset | 2 C/O | 24–240 V AC/DC | 3RN2012-1BW30 | 3RN2012-2BW30 |
| ATEX approved, protective separation, non-volatile | 2 C/O | 24 V AC/DC | 3RN2013-1BA30 | 3RN2013-2BA30 |
| ATEX approved, protective separation, non-volatile | 2 C/O | 24–240 V AC/DC | 3RN2013-1BW30 | 3RN2013-2BW30 |
| ATEX approved, protective separation, non-volatile, hard gold-plated contacts | 2 C/O | 24–240 V AC/DC | 3RN2013-1GW30 | 3RN2013-2GW30 |
| ATEX approved, 2 sensor circuits for warning and disconnection, protective separation | 1 C/O + 1 NO | 24–240 V AC/DC | 3RN2023-1DW30 | 3RN2023-2DW30 |
Technical data and article numbers are based on Siemens catalog IC 10 · 2026 (chapter 10, monitoring and control devices) and are for information only. Image is representative.
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