ABB 1SAZ741201R1023 TF42-1.0B thermal overload relay with 0.74–1.0 A adjustable motor protection range and Class 10 trip protection.
£78.17
The ABB 1SAZ741201R1023 is a reliable TF42-1.0B thermal overload relay designed to provide effective motor protection against overload conditions and phase failure in industrial automation, motor control panels and railway applications. As part of the ABB TF42-B thermal overload relay range, it delivers dependable electromechanical protection with compact installation and proven performance.
This overload relay protects motors by monitoring current flow through its three-pole bimetallic elements and tripping when overload conditions occur. The device includes adjustable overload settings, temperature compensation, phase-loss sensitivity, selectable manual or automatic reset, TEST and STOP functions and clear trip indication for efficient maintenance and fault diagnosis.
With an adjustable current range of 0.74–1.0 A, a 1 A rated operational current and Class 10 trip protection, the ABB 1SAZ741201R1023 TF42-1.0B is suitable for protecting small industrial motors used in machinery, pumps, fans and automation systems.
Thermal overload relays such as the ABB TF42-1.0B provide essential protection for electric motors by disconnecting control circuits when excessive current causes overheating. This helps prevent motor damage, improves equipment reliability and supports safe operation of industrial machinery.
The ABB TF42-B range is designed for machine builders, automation engineers and industrial electricians requiring compact motor protection devices with accurate adjustment, reliable fault detection and straightforward integration with ABB contactor systems.
| Manufacturer | ABB |
|---|---|
| Series | TF42-B Thermal Overload Relays |
| Model | 1SAZ741201R1023 |
| Product type | Thermal overload relay |
| Alternative designation | TF42-1.0B |
| Setting range | 0.74–1.0 A |
| Rated operational current | 1 A |
| Number of poles | 3 |
| Trip class | Class 10 |
| Main circuit rated voltage | 690 V AC |
| Auxiliary circuit rated voltage | 600 V AC/DC |
| Auxiliary contacts | 1 NC + 1 NO |
| Rated impulse withstand voltage | 6 kV |
| Mounting type | Direct mounting / rail mounting |
| Connection type | Screw terminals |
| Protection rating | IP20 |
| Dimensions (H × W × D) | approx. 88.3 × 45 × 70.5 mm |
| Weight | approx. 0.13 kg |
The ABB 1SAZ741201R1023 TF42-1.0B is a thermal overload relay used to protect motors against overload and phase failure conditions in industrial applications.
The ABB TF42-1.0B provides an adjustable protection range of 0.74–1.0 A.
The ABB 1SAZ741201R1023 uses a Class 10 thermal trip characteristic for reliable motor protection.
The overload relay includes 1 normally closed and 1 normally open auxiliary contact for signalling and control functions.
The TF42-1.0B is typically installed in industrial control panels and mounted directly with compatible ABB contactors.
ABB TF42-B thermal overload relays are widely used by machine builders and automation engineers to provide dependable motor protection, accurate overload monitoring and reliable operation in industrial systems.
● Service Agreements
Credit Accounts
Our service agreements are built to support long term procurement relationships. By working closely with engineering teams and procurement departments, we help streamline purchasing processes while ensuring consistent access to critical components and sourcing support when it matters most.
● frequently asked questions
At Led Controls Ltd we help engineers source the right automation and control gear with confidence. below are quick answers to what we are asked most often.
We supply all leading manfacturers in our industry. we offer next day delivery on most poplour products.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
● latest blog
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...