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ABB tf140du-90 thermal overload relay 66a – 90a
ABB TF140DU-90 thermal overload relay with adjustable current range from 66 to 90 A, designed for industrial motor protection and automation systems.
£160.58
Why Choose the ABB TF140DU-90 Thermal Overload Relay?
The ABB TF140DU-90 Thermal Overload Relay (1SAZ431201R1001) is a heavy-duty electromechanical motor protection relay designed to provide reliable overload and phase failure protection for larger three-phase motors in demanding industrial applications. As part of the proven ABB TF140DU thermal overload relay series, it is engineered for direct mounting onto compatible ABB contactors, making it an ideal solution for industrial motor starters, machinery and control panels.
Designed to maximise motor reliability while reducing costly downtime, the TF140DU-90 features temperature compensation, phase loss sensitivity and a Trip Class 10 characteristic for dependable overload protection. Integrated auxiliary contacts, manual or automatic reset selection and a clear trip indication simplify commissioning and maintenance in demanding industrial environments.
With an adjustable current setting range of 66 to 90 A, the TF140DU-90 is ideal for protecting larger industrial motors used in pumps, compressors, conveyors, fans and heavy manufacturing equipment. Its robust construction ensures dependable performance in continuous industrial operation.
Key Advantages
- Reliable thermal overload and phase failure protection for three-phase motors.
- 66 to 90 A adjustable current range for flexible motor protection.
- Trip Class 10 overload protection.
- Integrated 1 NO and 1 NC auxiliary contacts.
- Selectable manual or automatic reset.
- Temperature compensated for improved protection accuracy.
- Visual trip indication and TEST/STOP functions.
- Designed for industrial motor starter assemblies.
Key Features
- ABB TF140DU thermal overload relay series.
- 66 to 90 A adjustable overload setting.
- Trip Class 10.
- Protection against overload and phase failure.
- Integrated 1 normally open and 1 normally closed auxiliary contact.
- Manual or automatic reset selection.
- Temperature compensated operation.
- TEST and STOP 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 protects valuable equipment from overheating, extends motor service life and helps reduce unexpected downtime in industrial installations.
The ABB TF140DU series is trusted by OEMs, panel builders and maintenance engineers for dependable motor protection, straightforward installation and long-term reliability in demanding industrial applications.
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.
Technical Specifications
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| Compatible With | AF116–AF146 | |
|---|---|---|
| Mounting Type | Direct mount on contactor | |
| Current Range | 66–90 A | |
| Trip Class | Class 10A | |
| Reset Type | Manual / Automatic | |
| Device Type | Thermal Overload Relay | |
| Current | 90 A | |
| Phase | Three Phase | |
| IP Rating | IP20 | |
| Poles | 3-pole | |
| Series | TF140DU Thermal Overload Relays | |
| Product code | 1SAZ431201R1001 | |
| Product type | Thermal overload relay | |
| Current adjustment range | 66 to 90 A | |
| Rated operational current | 90 A | |
| Trip class | Class 10A | |
| Number of poles | 3P | |
| Auxiliary contacts | 1 NO + 1 NC | |
| Rated insulation voltage | 690 V AC | |
| Rated operational voltage | Main circuit 690 V AC / 440 V DC | |
| Rated impulse withstand voltage | Auxiliary circuit 6 kV, main circuit 8 kV | |
| Protection rating | Housing IP20, terminals IP10 | |
| Reset method | Automatic or manual | |
| Mounting type | Direct attachment to contactor | |
| Suitable contactors | ABB AF116, AF140 | |
| Terminal type | Screw terminals | |
| Dimensions (H × W × D) | approx. 140 × 89 × 126 mm | |
| Weight | approx. 0.82 kg | |
| Operating temperature | approx. -25 °C to +55 °C | |
| Standards | IEC/EN 60947-1, IEC/EN 60947-4-1, UL 60947-4-1 |
Frequently Asked Questions
What is the ABB TF140DU-90 used for?
The TF140DU-90 protects three-phase motors against overload conditions and phase failure in industrial motor control applications.
What current range does this overload relay support?
The relay provides an adjustable overload current setting from 66 to 90 A.
Can the relay be manually reset?
Yes. The TF140DU-90 supports both manual and automatic reset to suit different installation requirements.
What protection does the relay provide?
It provides reliable thermal overload and phase failure protection for three-phase industrial motors.
Where is the TF140DU-90 typically installed?
It is typically installed as part of industrial motor starter assemblies and electrical control panels protecting larger AC motors.
Trusted by Industrial Control Professionals
ABB TF140DU thermal overload relays are trusted worldwide by machine builders, electrical contractors and maintenance engineers for reliable motor protection, long service life and dependable operation in demanding industrial environments.
