ABB TF96-51 thermal overload relay with adjustable current range from 40 to 51 A, designed for industrial motor protection and automation systems.
£134.47
The ABB TF96-51 Thermal Overload Relay (1SAZ911201R1001) is a dependable electromechanical motor protection relay designed to safeguard three-phase motors against overload conditions and phase failure. As part of the proven ABB TF96 thermal overload relay series, it is engineered for direct mounting onto compatible ABB AF80 and AF96 contactors, making it an ideal solution for industrial motor starters and control panels.
Designed to maximise motor reliability and minimise unplanned downtime, the TF96-51 incorporates temperature compensation, phase loss sensitivity and a Trip Class 10 characteristic for accurate overload protection. Integrated auxiliary contacts, selectable manual or automatic reset and a clear trip indication simplify maintenance while ensuring safe and reliable operation in demanding industrial environments.
With an adjustable current setting range of 40 to 51 A, the TF96-51 is ideal for protecting industrial motors used in conveyors, pumps, compressors, fans and manufacturing equipment. Its compact design enables straightforward installation directly beneath compatible ABB AF80 and AF96 contactors.
Thermal overload relays protect electric motors by monitoring motor current and disconnecting the supply whenever prolonged overload conditions occur. This helps prevent overheating, extends motor service life and reduces costly downtime in industrial installations.
The ABB TF96 series is trusted by machine builders, panel manufacturers and maintenance engineers for its dependable protection, simple installation and seamless compatibility with ABB AF contactors. Integrated safety features and robust construction ensure reliable long-term performance in demanding industrial environments.
| Current | 51 A |
|---|---|
| Phase | Three Phase |
| IP Rating | IP20 |
| Series | TF96 Thermal Overload Relays |
| Product code | 1SAZ911201R1001 |
| Product type | Thermal overload relay |
| Current adjustment range | 40 to 51 A |
| Rated operational current | 51 A |
| Trip class | Class 10 |
| Number of poles | 3 |
| 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 AF80, AF96 |
| Terminal type | Screw terminals |
| Dimensions (H × W × D) | approx. 106.9 × 69.9 × 106.3 mm |
| Weight | approx. 0.52 kg |
| Operating temperature | approx. -40 °C to +70 °C |
| Standards | IEC/EN 60947-1, IEC/EN 60947-4-1, UL 60947-4-1 |
The TF96-51 protects three-phase motors against overload conditions and phase failure in industrial motor control applications.
The relay provides an adjustable overload current setting from 40 to 51 A.
Yes. The TF96-51 supports both manual and automatic reset to suit different installation requirements.
It is designed for direct mounting onto compatible ABB AF80 and AF96 contactors.
The relay includes one normally open (NO) and one normally closed (NC) auxiliary contact for signalling and control functions.
ABB TF96 thermal overload relays are trusted worldwide by machine builders, panel builders and maintenance engineers to provide reliable motor protection, long service life and seamless integration into industrial motor starter assemblies.
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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...