Why Choose the ABB TF42-1.7 Thermal Overload Relay?
The ABB TF42-1.7 Thermal Overload Relay (1SAZ721201R1028) 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 provides reliable motor protection for industrial control panels, motor starters and automation systems.
Designed for direct mounting onto compatible ABB block contactors, the TF42-1.7 helps maximise motor reliability while reducing downtime caused by excessive current conditions. Integrated temperature compensation, selectable automatic or manual reset and built-in auxiliary contacts make installation and operation straightforward in demanding industrial environments.
With an adjustable current setting of 1.3 to 1.7 A, trip class 10 protection and a compact panel-mounted design, the TF42-1.7 is ideal for protecting small motors used in conveyors, pumps, fans, compressors and general industrial machinery.
Key Advantages
- Compact thermal overload relay for industrial motor protection.
- Adjustable overload current range of 1.3 to 1.7 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 ABB block contactors for fast installation.
Key Features
- ABB TF42 thermal overload relay series.
- 1.3 to 1.7 A adjustable current range.
- Trip class 10 motor protection.
- 3-pole electromechanical overload relay.
- Integrated 1 normally open and 1 normally closed auxiliary contact.
- 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 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 both sustained overloads and phase failure, improving the reliability of industrial motor control systems.
Designed for machine builders, panel manufacturers and maintenance engineers, the TF42-1.7 combines simple 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.
