TF42-5.7 Thermal overload relay 1SAZ721201R1038

Motor protection with thermal overload relay TF42-5.7

The TF42-5.7 thermal overload relay is an economical and reliable device for protecting motor circuits against overload and phase failure. Designed to work with AF09 – AF38 series contactors, it is a key element in protecting electrical installations in industry and construction. The device is characterized by a release class of 10, which ensures a quick and effective response in the event of a failure.

Versatile application and easy installation

The TF42-5.7 relay offers a wide range of current settings from 4.2 to 5.7 A, allowing it to be adapted to different loads. Direct mounting on contactors or using additional terminal blocks provides installation flexibility. The device also has an automatic or manual reset function, which makes it easier to operate and adapt to specific application needs. Additionally, the presence of a normally open (NO) and normally closed (NC) auxiliary contact enables integration with control and signaling systems.

Solid construction and compliance with standards

The TF42-5.7 thermal overload relay is made of high-quality materials, which guarantees its durability and reliability even in harsh working conditions. It has temperature compensation in the range of -25°C to +60°C, ensuring precise protection regardless of ambient temperature. It meets the requirements of IEC/EN 60947-1, IEC/EN 60947-4-1 and IEC/EN 60947-5-1 standards, which confirms its safety and compliance with applicable standards. Equipped with a trip (STOP) and test (TEST) function for easy diagnostics.

• Wide current setting range: 4.2 – 5.7 A – ideal for various motor applications.
• Release class 10: ensures a quick response to overloads and phase failures.
• Automatic or manual reset: flexibility to adapt to user needs.
• Temperature compensation: precise protection in a wide range of ambient temperatures (-25°C to +60°C).
• NO/NC auxiliary contacts: enable integration with control and signaling systems.
• Direct or terminal block mounting: installation flexibility.
• IEC/EN compliance: guarantees safety and reliability.
• Durable construction: ensures long-term operation even in harsh industrial conditions.