ABB TF42-3.1 1SAZ721201R1033 Thermal Overload Relay 2.3-3.1A

The ABB TF42-3.1 (article 1SAZ721201R1033) is a thermal overload relay for main circuit motor protection. It covers a current setting range of 2.3 - 3.1 A with trip class 10, and mounts directly to block contactors for a compact, economical installation. It guards motors against overload conditions and phase failure through electromechanical operation.

Technical specifications:

• Series: TF42-3.1
• ABB article number: 1SAZ721201R1033
• EAN: 4013614398087
• Type: Thermal overload relay
• Current setting range: 2.3 - 3.1 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 ensures fast disconnection when motor current exceeds the set threshold
• Phase failure detection cuts power before single-phasing causes motor winding damage
• Temperature compensation keeps tripping behavior consistent regardless of ambient temperature changes
• Selectable automatic or manual reset gives operators control over restart behavior after a trip
• Trip-free mechanism, STOP function, and built-in trip indication support safe and transparent operation

Applications:

• Overload protection for small motors in industrial machinery and automation systems
• Safeguarding pump and fan motor circuits rated within the 2.3 - 3.1 A range
• Direct-mount protection in motor control panels equipped with block contactors
• Low-current motor circuits where phase failure detection is required

Also known as: ABB TF42-3.1, TF42-3.1 1SAZ721201R1033, ABB thermal overload relay 2.3-3.1 A, ABB motor protection relay, 1SAZ721201R1033.