ABB TF42-35 thermal overload relay with adjustable current range from 29 to 35 A, designed for industrial motor protection and automation systems.
£110.02
The ABB TF42-35 Thermal Overload Relay (1SAZ721201R1053) is a compact and dependable thermal overload protection relay designed to protect three-phase motors against overload and phase failure. As part of the proven ABB TF42 thermal overload relay series, it delivers reliable motor protection for industrial control panels, motor starters and automation systems.
Designed for direct mounting onto compatible ABB block contactors, the TF42-35 helps maximise motor reliability while reducing costly downtime caused by overload conditions. Integrated temperature compensation, selectable manual or automatic reset, trip indication and built-in auxiliary contacts make installation and operation straightforward in demanding industrial environments.
With an adjustable current setting of 29 to 35 A, trip class 10 protection and a compact panel-mounted design, the TF42-35 is ideal for protecting industrial motors used in conveyors, pumps, compressors, fans and general production machinery.
Thermal overload relays continuously 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 overloads and phase failure, improving the reliability of industrial motor control systems.
Designed for machine builders, panel manufacturers and maintenance engineers, the TF42-35 combines straightforward installation with proven ABB reliability. Its integrated signalling contacts, trip indication and flexible reset options make it suitable for a wide range of industrial automation and motor starter applications.
| Current | 35 A |
|---|---|
| Phase | Three Phase |
| IP Rating | IP20 |
| Series | TF42 Thermal Overload Relays |
| Product code | 1SAZ721201R1053 |
| Product type | Thermal overload relay |
| Current adjustment range | 29 to 35 A |
| Rated operational current | 35 A |
| Trip class | Class 10 |
| Number of poles | 3 |
| Auxiliary contacts | 1 NO + 1 NC |
| Rated insulation voltage | 690 V AC |
| Rated operational voltage | Auxiliary circuit 600 V AC/DC |
| Rated impulse withstand voltage | 6 kV |
| Protection rating | IP20 |
| Reset method | Automatic or manual |
| Mounting type | Direct attachment to contactor |
| Terminal type | Screw terminals |
| Dimensions (H × W × D) | approx. 88.3 × 45 × 70.5 mm |
| Weight | approx. 0.145 kg |
| Operating temperature | approx. -25 °C to +60 °C |
| Standards | IEC/EN 60947-1, IEC/EN 60947-4-1, UL 60947-4-1 |
The TF42-35 protects three-phase electric motors against overload and phase failure in industrial motor control applications.
The relay features an adjustable overload setting from 29 to 35 A.
Yes. The TF42-35 allows users to select either manual or automatic reset depending on the application.
The TF42-35 is designed for direct mounting onto compatible ABB AF09 to AF38 block contactors.
The relay includes 1 normally open (NO) and 1 normally closed (NC) auxiliary contacts for control and signalling functions.
ABB TF42 thermal overload relays are trusted by panel builders, OEMs and industrial maintenance engineers to provide dependable overload protection, helping maximise motor reliability and minimise unplanned downtime.
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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...