Why Choose the ABB TF42-3.1 Thermal Overload Relay?
The ABB TF42-3.1 Thermal Overload Relay (1SAZ721201R1033) is a compact and dependable thermal overload protection relay designed to safeguard three-phase motors against overload and phase failure. As part of the trusted ABB TF42 thermal overload relay series, it delivers reliable motor protection for industrial control panels, motor starters and automation systems.
Designed for direct mounting onto compatible ABB block contactors, the TF42-3.1 helps maximise motor reliability while reducing costly downtime caused by overload conditions. Temperature compensation, selectable manual or automatic reset and integrated auxiliary contacts make installation and operation simple while ensuring dependable performance in demanding industrial environments.
With an adjustable current setting of 2.3 to 3.1 A, trip class 10 protection and a compact panel-mounted design, the TF42-3.1 is ideal for protecting small industrial motors used in conveyors, pumps, compressors, fans and general production machinery.
Key Advantages
- Compact thermal overload relay for industrial motor protection.
- Adjustable overload current range of 2.3 to 3.1 A.
- Reliable trip class 10 overload and phase failure protection.
- Integrated 1 NO + 1 NC auxiliary contacts.
- Selectable manual or automatic reset.
- Direct mounting onto compatible ABB AF09 to AF38 block contactors.
Key Features
- ABB TF42 thermal overload relay series.
- 2.3 to 3.1 A adjustable current range.
- Trip class 10 motor protection.
- 3-pole electromechanical overload relay.
- Integrated 1 normally open and 1 normally closed auxiliary contacts.
- Temperature-compensated operation.
- Trip-free mechanism with STOP and TEST function.
- Compact direct-mount design for ABB contactors.
Reliable Motor Protection for Industrial Applications
Thermal overload relays continuously monitor motor current and disconnect the circuit when overload conditions occur, helping prevent overheating and extending motor service life. The ABB TF42 series provides dependable protection against overloads and phase failure, improving the reliability of industrial motor control systems.
Designed for machine builders, panel manufacturers and maintenance engineers, the TF42-3.1 combines straightforward installation with proven ABB reliability. Its integrated signalling contacts and flexible reset options make it suitable for a wide range of industrial automation and motor starter applications.
Typical Applications
- Motor starter assemblies.
- Industrial conveyors.
- Pumps and booster systems.
- Fans and ventilation equipment.
- Compressors.
- OEM machinery and industrial automation panels.
