ABB TF140DU-90 thermal overload relay with adjustable current range from 66 to 90 A, designed for industrial motor protection and automation systems.
£247.04
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.
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.
| Current | 90 A |
|---|---|
| Phase | Three Phase |
| IP Rating | IP20 |
| 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 |
The TF140DU-90 protects three-phase motors against overload conditions and phase failure in industrial motor control applications.
The relay provides an adjustable overload current setting from 66 to 90 A.
Yes. The TF140DU-90 supports both manual and automatic reset to suit different installation requirements.
It provides reliable thermal overload and phase failure protection for three-phase industrial motors.
It is typically installed as part of industrial motor starter assemblies and electrical control panels protecting larger AC motors.
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.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...