ABB TF42-35 Thermal Overload Relay, 28-35 A, 690 V AC, 3-Pole, Class 10, 1NO+1NC

Thermal overload relay for three-phase motor protection with precise overload detection and phase failure sensitivity. The ABB TF42-35 offers a setting range of 28–35 A, ensuring reliable protection for motors up to 35 A at 690 V AC.

Advantages

With a trip class of 10, this relay provides fast response to overload conditions, minimizing downtime and preventing motor damage. Its manual and automatic reset options offer flexibility for various control schemes, while the integrated 1NO+1NC auxiliary contacts enable seamless integration into monitoring and alarm circuits. Direct mounting to compatible ABB contactors simplifies installation and reduces wiring complexity.

Suitable for

• Protection of three-phase motors in industrial machinery and process equipment
• Applications requiring reliable overload and phase failure protection
• Integration with ABB AF series contactors (AF26 to AF96) for compact motor starters
• Environments with ambient temperatures from -25 °C to +60 °C

Key specifications

• Rated operational current: 35 A
• Setting range: 28–35 A
• Rated operational voltage: 690 V AC
• Number of poles: 3
• Trip class: 10
• Auxiliary contacts: 1 NO + 1 NC
• Reset type: manual and automatic
• Mounting: direct to contactor or stand-alone with adapter
• Degree of protection: IP20
• Standards: IEC/EN 60947-1, IEC/EN 60947-4-1, IEC/EN 60947-5-1, UL 60947-1, UL 60947-4-1, CSA C22.2 No. 60947-1, CSA C22.2 No. 60947-4-1

Recommendations

For optimal performance, pair the TF42-35 with ABB AF series contactors (AF26 to AF96) to create a compact and reliable motor starter solution.