Product Description
Siemens 3RN1012-1CB00
The Siemens 3RN1012-1CB00 is a SIRIUS thermistor motor protection relay designed for reliable monitoring and protection of motors against thermal overload. It operates by evaluating the resistance of a PTC thermistor sensor embedded in the motor windings. This compact unit is ideal for applications where direct current measurement is not feasible or as supplementary protection. It features a wide voltage range, auto/manual/remote reset capabilities, and a test function, ensuring versatile and secure motor operation in various industrial environments.
Technical Specifications:
- Product Type: Thermistor Motor Protection Relay (SIRIUS 3RN1)
- Control Supply Voltage: 24 … 240 V AC/DC at 50/60 Hz
- Output Contacts: 1 NO (Normally Open) + 1 NC (Normally Closed) changeover contact
- Reset Function: Manual / Auto / Remote Reset
- Terminal Type: Screw-type terminals

Siemens 3RN1012-1CB00
Protect your motors with the Siemens 3RN1012-1CB00 SIRIUS thermistor relay. This device offers reliable overheating protection with a 24-240V AC/DC supply, 1 NO + 1 NC contacts, and versatile manual/auto/remote reset options.







