Siemens Sirius 3RN1012-1CB00 Thermistor Motor Protection Relay

- Brand: Siemens

- Model: SIRIUS 3RN1012-1CB00

- Type: Thermistor Motor Protection Relay / PTC Thermistor Monitoring Relay

- Part Number: 3RN1012-1CB00

- Technical Specifications:

- SIRIUS 3RN10 series thermistor motor protection relay

- Designed for monitoring motor winding temperature via PTC thermistors

- Sensor type: PTC thermistors according to DIN 44081 / DIN 44082

- Number of sensor circuits: 1

- Supply voltage: 24–240 VAC/DC

- Frequency: 50/60 Hz

- Multivoltage operation

- Measuring circuit voltage: ≤ 2.5 V

- Response resistance (trip point): 3.3 kΩ

- Reset resistance: 1.8 kΩ

Short-circuit detection: < 20 Ω

- Open-circuit detection: Yes

- Manual reset: Front-panel pushbutton

- Remote reset input: Yes

- Automatic reset selectable

- Output contacts: 1 changeover contact (SPDT)

- Contact rating: 6 A at 250 VAC

- Conventional thermal current (Ith): 6 A

- Rated insulation voltage (Ui): 300 V

- Rated impulse withstand voltage (Uimp): 6 kV

- Response time: < 0.5 s

- LED indicators: Green: Supply voltage, Red: Fault/trip indication

- Connection type: Screw terminals

- Mounting: DIN rail 

- Protection class: IP20 (terminals)

- Operating temperature: -25°C to +60°C

- Standards: IEC 60947-8, DIN 44081, DIN 44082, UL, CSA, CE, EAC

- Status: Discontinued

Weight: 150 g

Dimensions: 22.5 × 100 × 91 mm 

Country of Origin: Germany

HS Code: 8536.49