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ABB tf42-4.2 thermal overload relay 3.1a - 4.2a
MPN: 1SAZ721201R1035
Alt. SKU: TF42-4.2
Special Price
£44.21
£36.84
Regular Price
£68.02
Why Choose the TF42-4.2 [1SAZ721201R1035]
The TF42-4.2 thermal overload relay provides cost-effective electromechanical protection for motor circuits, ensuring dependable and rapid response to overloads and phase failures. Rated with a trip class 10, it incorporates temperature compensation for accurate operation. Key features include a normally closed trip contact, a normally open signal contact, selectable automatic or manual reset, a trip-free mechanism, a STOP function, and clear trip indication. Designed for direct mounting onto corresponding block contactors, the relay is supported by available single mounting kits for straightforward installation.
Technical Specification
- Function: Thermal overload relay with trip class 10 for motor protection against overload and phase failure.
- Rated Operational Current: 4.2 A, setting range 3.1 to 4.2 A.
- Voltage Ratings: Main circuit 690 V AC / 600 V DC; Auxiliary circuit 600 V AC/DC.
- Contact Configuration: 3 poles protected; 1 normally closed (NC) trip contact; 1 normally open (NO) signal contact.
- Insulation and Impulse Withstand Voltage: Rated insulation voltage 690 V; impulse withstand voltage 6 kV for main and auxiliary circuits.
- Degree of Protection: IP20.
- Terminal Type and Size Range: Flexible and rigid cables from 0.75 to 4 mm²; suitable for ferrules; tightens to 1–2.5 N·m torque.
- Key Mechanical Features: Trip-free mechanism, selectable automatic or manual reset, with trip indication and STOP function.
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"Specified by UK panel builders for dependable control." Controls Engineer, UK
Frequently Asked Questions
What is the function of the TF42-4.2 thermal overload relay?
The TF42-4.2 thermal overload relay provides protection for motors against overload and phase failure, featuring a trip class of 10.
What is the rated operational current for this relay?
The rated operational current is 4.2 A, with a setting range from 3.1 to 4.2 A.
What voltage ratings does the TF42-4.2 support?
The relay supports a main circuit voltage of 690 V AC / 600 V DC and an auxiliary circuit voltage of 600 V AC/DC.
What is the degree of protection for this relay?
The TF42-4.2 has a degree of protection rated at IP20.
What type of cables can be used with the TF42-4.2?
The relay is suitable for flexible and rigid cables ranging from 0.75 to 4 mm² and can accommodate ferrules.
Can the relay be reset automatically?
Yes, the TF42-4.2 features a selectable automatic or manual reset function.
What should I refer to for standards and approvals?
See the manufacturer's data sheet for standards and approvals.
| Manufacturer Part Number | 1SAZ721201R1035 |
|---|---|
| Amp Range | 3.1A - 4.2A |
| HS Code | 85364900 |
| Country of Manufacture | Germany |
| Manufacturer | ABB |
| Alternative Product SKU | TF42-4.2 |
| Barcode | 4013614398094 |
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Motor protection for overload and phase failure
Thermal overload relays are economic electromechanical protection devices for the main circuit. They offer reliable protection for motors in the event of overload or phase failure. The thermal overload relay can make up a compact starting solution together with contactors.
Main Benefits:
- Reliable protection for motors
- Easy to create starters
- Optimized match to ABB contactors
- Single mounting kits and wire reset for
remote control available for specific applications
Main Features:
- Adjustable current setting ranges
- Overload protection with phase loss sensitivity
- Temperature compensation up to +60°C
- Automatic or manual reset, sealable
- Stop and test function
