ABB TF42-29 1SAZ721201R1052 Thermal Overload Relay 24-29A

The ABB TF42-29 (article 1SAZ721201R1052) is a thermal overload relay for motor protection in the main circuit. It covers a current setting range of 24 to 29 A and operates at trip class 10, protecting motors against overload and phase failure. The relay connects directly to block contactors, with single mounting kits available as an accessory for standalone installation.

Technical specifications:

• Series: TF42-29
• ABB article number: 1SAZ721201R1052
• EAN: 4016779764988
• Current setting range: 24 - 29 A
• Trip class: 10
• Trip contact: NC
• Signal contact: NO
• Reset mode: Automatic or manual (selectable)
• Mounting: Direct connection to block contactors; single mounting kits available as accessory

Features and benefits:

• Trip class 10 delivers fast disconnection when a motor draws excessive current during overload
• Phase failure detection guards motors from damage caused by loss of a supply phase
• Temperature compensation maintains consistent tripping behaviour across varying ambient temperatures
• Selectable automatic or manual reset gives the installer direct control over fault-recovery behaviour
• Trip-free mechanism with STOP function and trip indication supports safe fault response and rapid diagnosis

Applications:

• Overload and phase failure protection for three-phase motors in industrial equipment
• Motor control centers using block contactors requiring coverage in the 24 - 29 A range
• Pumps, compressors, and conveyor drives where motor protection is required
• Light to medium industrial machinery calling for an economic electromechanical protection device

Also known as: ABB TF42-29, TF42-29 1SAZ721201R1052, thermal overload relay 29 A, motor overload relay 24-29A, TF42 series overload relay.