Why Choose the ABB TF140DU-135 Thermal Overload Relay?
The ABB TF140DU-135 Thermal Overload Relay (1SAZ431201R1003) is a heavy-duty electromechanical motor protection relay designed to provide dependable overload and phase failure protection for larger three-phase motors operating in demanding industrial environments. As part of the proven ABB TF140DU thermal overload relay series, it is designed for direct mounting onto compatible ABB AF116 and AF140 contactors, making it an ideal solution for industrial motor starters, machinery and electrical control panels.
Designed to maximise motor reliability while reducing costly downtime, the TF140DU-135 features temperature compensation, phase loss sensitivity and a Trip Class 10A characteristic for accurate overload protection. Integrated auxiliary contacts, selectable manual or automatic reset and built-in STOP and TEST functions simplify installation, commissioning and ongoing maintenance.
With an adjustable current setting range of 100 to 135 A, the TF140DU-135 is ideally suited for protecting larger industrial motors used in pumps, compressors, conveyors, fans and heavy manufacturing equipment. Its rugged construction ensures dependable long-term performance in continuous industrial service.
Key Advantages
- Reliable thermal overload and phase failure protection for three-phase motors.
- 100 to 135 A adjustable current range for flexible motor protection.
- Trip Class 10A overload protection.
- Integrated 1 NO and 1 NC auxiliary contacts.
- Selectable manual or automatic reset.
- Direct mounting onto compatible ABB AF116 and AF140 contactors.
- Temperature compensated for improved protection accuracy.
- Built-in STOP and TEST functions with visual trip indication.
Key Features
- ABB TF140DU thermal overload relay series.
- 100 to 135 A adjustable overload setting.
- Trip Class 10A.
- Protection against overload and phase failure.
- Integrated 1 normally open and 1 normally closed auxiliary contact.
- Manual or automatic reset selection.
- Temperature compensated operation.
- Trip-free mechanism with STOP and TEST functions.
- Three-pole motor protection.
- Heavy-duty industrial construction.
Reliable Motor Protection for Industrial Applications
Thermal overload relays continuously monitor motor current and disconnect the motor whenever prolonged overload conditions or phase failure occur. This helps prevent overheating, extend motor service life and minimise unexpected downtime across industrial installations.
The ABB TF140DU series is trusted by OEMs, panel builders and maintenance engineers for dependable motor protection, straightforward installation and seamless compatibility with ABB AF contactors. Its robust construction ensures long service life in demanding industrial environments.
Typical Applications
- Industrial motor starters.
- Heavy-duty conveyor systems.
- Pumps and water treatment equipment.
- Compressors.
- Industrial fans and ventilation systems.
- Manufacturing and process machinery.
- OEM machinery.
- Industrial control panels.
