TF42-2.3 Thermal overload relay 1SAZ721201R1031

Reliable motor protection – ABB TF42-2.3 thermal overload relay

The ABB TF42-2.3 thermal overload relay (1SAZ721201R1031) is an economical and reliable device for protecting motor circuits against overload and phase failure. Designed to work with AF series contactors, it provides effective protection in demanding industrial conditions. Class 10 release guarantees a quick response to irregularities, minimizing the risk of damage to connected devices.

This model offers a wide current setting range from 1.7 to 2.3 A, allowing for precise adjustment to the characteristics of the protected motor. Equipped with automatic or manual reset, it offers flexibility depending on the application needs. Additionally, it has a built-in normally open (NO) and normally closed (NC) auxiliary contact, enabling integration with control and signaling systems.

Functionality and application

The TF42-2.3 relay is designed for direct mounting on contactors, simplifying installation and reducing wiring costs. Its compact dimensions (45 mm width, 88.3 mm height and 70.5 mm depth) allow for mounting in tight switchgear spaces. The device is characterized by high resistance to environmental conditions, ensuring stable operation in a temperature range from -25°C to +60°C.

Application:

• Protection of electric motors in industrial installations
• Protection against overload and phase failure
• Control and alarm systems
• Applications requiring reliable protection of motor circuits

Key features and benefits

• Wide current setting range (1.7...2.3 A): Precise adjustment to the characteristics of the protected motor.
• Release class 10: Quick response to overloads and phase failures.
• Automatic or manual reset: Flexibility to adapt to the specifics of the application.
• NO/NC auxiliary contact: Possibility of integration with control and signaling systems.
• Direct mounting: Simplified installation and reduced wiring costs.
• Operating temperature -25…+60°C: Possibility of use in difficult environmental conditions.
• Reset button: Allows for quick restoration of operation after removing the cause of the relay operation.
• Rated voltage 690 V: Wide range of operating voltages for various applications.
• High reliability: Guarantee of long-term and trouble-free operation of the device thanks to the high quality of ABB workmanship.