ABB Thermal Overload Relay TF42-16, 13-16 A, Class 10, 690 V, 3-Pole, 1NO+1NC 1SAZ721201R1047

In industrial motor control panels, protecting three-phase motors from overheating is critical. The ABB TF42-16 thermal overload relay provides reliable protection for motors with rated currents between 13 and 16 A. It is commonly used by panel builders and maintenance engineers in manufacturing plants, HVAC systems, and pumping stations. The relay monitors motor current and trips on overload or phase loss, preventing costly motor burnout and downtime.

Key specifications

• Current adjustment range: 13 - 16 A
• Tripping class: Class 10
• Number of poles: 3
• Rated operational voltage: 690 V AC
• Auxiliary contacts: 1 NO + 1 NC
• Reset type: Manual and automatic
• Mounting: Direct to contactor or stand-alone
• Suitable for ABB contactors AF09 - AF38
• Temperature compensation: Yes
• Phase loss sensitivity: Yes
• Degree of protection: IP20 (terminals), IP10 (housing)
• Connection type: Screw terminals
• Standards: IEC/EN 60947-4-1

Why choose it

The TF42-16 offers precise thermal protection with ambient temperature compensation, ensuring consistent tripping even in varying temperatures. Its phase loss sensitivity guards against single-phasing, a common cause of motor failure. The relay can be mounted directly onto ABB contactors or installed separately, providing flexibility in panel design. Manual and automatic reset options allow adaptation to different operational needs.

Ideal use cases

• Protecting three-phase motors in conveyor systems
• Pump and fan motor protection in HVAC applications
• Machine tools and compressors in manufacturing
• Retrofitting existing ABB contactor installations

Good to know

The relay operates in ambient temperatures from -25 °C to +60 °C and can be stored from -50 °C to +80 °C. Power loss is only 3.5 W, contributing to energy efficiency. Screw terminals ensure secure wiring. The device complies with international standards, making it suitable for global applications.