Description
Description
The Siemens 3RU2126-4DB0 is a thermal overload relay from the SIRIUS 3RU2 series, engineered to protect motors from damage due to overload or phase failure. Designed for use with S0-sized contactors, it features an adjustable current range of 20 to 25 A, making it suitable for motors up to 11 kW at 400 V. This relay includes both manual and automatic reset options and integrates one normally open (1 NO) and one normally closed (1 NC) auxiliary contact for signaling and control. With a trip class 10 response time, high shock resistance (8g / 11 ms), and a wide operating temperature range from –40 °C to +70 °C, it ensures dependable performance in demanding industrial environments.
Features
- Adjustable current range: Protects motors operating between 20 and 25 A, ideal for motors up to 11 kW at 400 V.
- Trip class 10: Offers standard response time for overload protection in typical motor applications.
- Integrated auxiliary contacts: Includes 1 NO (trip indication) and 1 NC (contactor disconnection) for control and signaling.
- Reset flexibility: Supports both manual and automatic reset modes.
- Robust environmental tolerance: Operates from –40 °C to +70 °C, with storage down to –55 °C.
- Shock resistance: Rated at 8g / 11 ms, ensuring durability in industrial environments.
- High voltage endurance: Rated insulation voltage of 690 V and surge resistance of 6 kV.
- Screw terminal connections: For secure and straightforward wiring of both main and auxiliary circuits.
- Mounting compatibility: Designed for direct mounting on S0-sized contactors.
- Environmental compliance: RoHS compliant and includes an Environmental Product Declaration (EPD).
