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ABB tf42-24 thermal overload relay 20a – 24a
ABB TF42-24 thermal overload relay with adjustable current range from 20 to 24 A, designed for industrial motor protection and automation systems.
£64.06
Why Choose the ABB TF42-24 Thermal Overload Relay?
The ABB TF42-24 Thermal Overload Relay (1SAZ721201R1051) 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 TF42-24 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 20 to 24 A, trip class 10 protection and a compact panel-mounted design, the TF42-24 is ideal for protecting industrial motors used in conveyors, pumps, compressors, fans and general production machinery.
Key Advantages
- Compact thermal overload relay for industrial motor protection.
- Adjustable overload current range of 20 to 24 A.
- Reliable trip class 10 overload and phase failure protection.
- Integrated 1 NO + 1 NC auxiliary contacts.
- Selectable manual or automatic reset.
- Direct mounting onto compatible ABB AF09 to AF38 block contactors.
Key Features
- ABB TF42 thermal overload relay series.
- 20 to 24 A adjustable current range.
- Trip class 10 motor protection.
- 3-pole electromechanical overload relay.
- Integrated 1 normally open and 1 normally closed auxiliary contacts.
- Temperature-compensated operation.
- Trip-free mechanism with STOP and TEST function.
- Compact direct-mount design for ABB contactors.
Reliable Motor Protection for Industrial Applications
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 TF42-24 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.
Typical Applications
- Motor starter assemblies.
- Industrial conveyors.
- Pumps and booster systems.
- Fans and ventilation equipment.
- Compressors.
- OEM machinery and industrial automation panels.
Technical Specifications
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| Compatible With | AF09–AF38 | |
|---|---|---|
| Current | 24 A | |
| Mounting Type | Direct mount on contactor | |
| Device Type | Thermal Overload Relay | |
| Current Range | 20–24 A | |
| Trip Class | Class 10 | |
| Reset Type | Manual / Automatic | |
| Phase | Three Phase | |
| IP Rating | IP20 | |
| Poles | 3-pole | |
| Current adjustment range | 20 to 24 A | |
| Rated operational current | 24 A | |
| Series | TF42 Thermal Overload Relays | |
| Product code | 1SAZ721201R1051 | |
| Product type | Thermal overload relay | |
| 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 | |
| Operating temperature | approx. -25 °C to +60 °C | |
| Weight | approx. 0.13 kg |
Frequently Asked Questions
What is the ABB TF42-24 used for?
The TF42-24 protects three-phase electric motors against overload and phase failure in industrial motor control applications.
What current range does this overload relay support?
The relay features an adjustable overload setting from 20 to 24 A.
Does the relay support manual and automatic reset?
Yes. The TF42-24 allows users to select either manual or automatic reset depending on the application.
Which contactors is this relay compatible with?
The TF42-24 is designed for direct mounting onto compatible ABB AF09 to AF38 block contactors.
What auxiliary contacts are included?
The relay includes 1 normally open (NO) and 1 normally closed (NC) auxiliary contacts for control and signalling functions.
Trusted for Industrial Motor Protection
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.
