ABB Thermal Overload Relay TF42-1.0, 0.74-1.0 A, Class 10E, 3-Pole, 690 V AC, Screw Terminals 1SAZ721201R1023

Thermal overload relay engineered for dependable motor protection in industrial control systems. The TF42-1.0 delivers precise current monitoring across a 0.74 to 1.0 A setting range, safeguarding three-phase motors against overload and phase loss. Its Class 10E tripping characteristic ensures fast response to overcurrent conditions, while the wide ambient temperature range of -25 to +60 °C with automatic compensation maintains accuracy in demanding environments.

Advantages

Direct mounting on ABB AF09 to AF38 contactors simplifies installation and reduces wiring. The relay offers both manual and automatic reset modes, adapting to different operational requirements. A compact IP20 housing with screw terminals provides secure connections and easy integration into control panels. Auxiliary contacts (1 NO + 1 NC) enable reliable signaling and interlocking.

Suitable for

• Three-phase motor protection in industrial machinery
• Pump, fan, and conveyor applications
• Control panels requiring compact overload protection
• Systems using ABB AF series contactors

Key specifications

• Current setting range: 0.74 - 1.0 A
• Tripping class: 10E
• Number of poles: 3
• Rated operational voltage: 690 V AC
• Auxiliary contacts: 1 NO + 1 NC
• Reset: manual and automatic
• Temperature compensation: -25 to +60 °C
• Degree of protection: IP20
• Mounting: direct to contactor or stand-alone
• Connection: screw terminals

Recommendations

For optimal performance, pair the TF42-1.0 with ABB AF09...AF38 contactors. Verify motor full-load current falls within the 0.74-1.0 A range. Ensure proper ventilation in enclosures due to IP20 rating. Use appropriate screwdriver torque for terminal connections.