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1SAZ741201R1023 ABB TF42-1.0B Thermal Overload Relay 0.74 … 1.0 A
ABB 1SAZ741201R1023 TF42-1.0B thermal overload relay with 0.74–1.0 A adjustable motor protection range and Class 10 trip protection.
£50.81
Why Choose the ABB 1SAZ741201R1023 TF42-1.0B Thermal Overload Relay?
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.
Key Advantages
- Reliable ABB thermal overload relay for motor protection applications.
- 0.74–1.0 A adjustable overload protection range for accurate motor protection.
- Class 10 thermal trip characteristic suitable for standard motor starting applications.
- Protection against motor overload and phase failure conditions.
- Temperature compensation ensures reliable operation across changing environments.
- Suitable for direct mounting with compatible ABB contactors.
Key Features
- ABB TF42-B thermal overload relay series.
- 0.74–1.0 A adjustable current setting range.
- 1 A rated operational current.
- 3-pole motor protection design.
- Class 10 trip protection.
- 1 normally closed auxiliary contact.
- 1 normally open auxiliary contact.
- Manual or automatic reset selection.
- Integrated TEST and STOP functions.
- Trip indication for fast fault identification.
Reliable Motor Protection for Industrial 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.
Typical Applications
- Industrial motor control panels.
- Pumps and fan systems.
- Machine building and OEM equipment.
- Conveyor and material handling systems.
- Industrial automation installations.
- Railway and transport-related motor applications.
Technical Specifications
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| Compatible With | AF09–AF38 | |
|---|---|---|
| Mounting Type | Direct mount on contactor | |
| Device Type | Thermal Overload Relay | |
| Current Range | 0.74–1 A | |
| Trip Class | Class 10 | |
| Reset Type | Manual / Automatic | |
| Poles | 3-pole | |
| 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 |
Frequently Asked Questions
What is the ABB 1SAZ741201R1023 used for?
The ABB 1SAZ741201R1023 TF42-1.0B is a thermal overload relay used to protect motors against overload and phase failure conditions in industrial applications.
What is the adjustable current range of this overload relay?
The ABB TF42-1.0B provides an adjustable protection range of 0.74–1.0 A.
What trip class does this motor protection relay use?
The ABB 1SAZ741201R1023 uses a Class 10 thermal trip characteristic for reliable motor protection.
What auxiliary contacts are included?
The overload relay includes 1 normally closed and 1 normally open auxiliary contact for signalling and control functions.
Where is the ABB 1SAZ741201R1023 typically installed?
The TF42-1.0B is typically installed in industrial control panels and mounted directly with compatible ABB contactors.
Trusted by Industrial Automation Professionals
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.
