Description
The Siemens 3RU2126-4BB0 is a thermal overload relay engineered to provide dependable motor protection across a wide range of HVAC and industrial applications. Designed for use with Siemens 3RT contactors, this relay safeguards motors from overload, phase failure, and phase imbalance conditions that can cause costly equipment damage and downtime.
Key Features
- Current setting range: 14–20 amps
- Compatible with Siemens 3RT2 series contactors for direct mounting
- Provides protection against motor overload, phase loss, and phase unbalance
- Manual and automatic reset modes for flexible operation
- Compact, space-saving design for panel and enclosure installations
- Integrated test and reset button for easy commissioning and maintenance
- Trip class protection suitable for standard motor starting applications
Applications
- HVAC motor starters and control panels
- Commercial and industrial motor protection circuits
- Pump, fan, and compressor motor control
- Building automation and mechanical room electrical panels
Why Choose Siemens Overload Relays?
Siemens overload relays are trusted by electrical contractors and HVAC professionals for their precision, durability, and seamless integration with the Siemens SIRIUS control product family. The 3RU2126-4BB0 offers a reliable, cost-effective solution for protecting motors in demanding commercial and industrial environments.







Reviews
There are no reviews yet.