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ABB tf42-20 thermal overload relay 16a - 20a
MPN: 1SAZ721201R1049
Alt. SKU: TF42-20
Special Price
£59.40
£49.50
Regular Price
£91.39
Why Choose the TF42-20 [1SAZ721201R1049]
The TF42-20 thermal overload relay provides cost-effective electromechanical protection for main motor circuits. It delivers dependable and rapid response to overload conditions and phase failure, with a trip class 10 rating. Key features include temperature compensation, 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 on corresponding contactor blocks, compatible single mounting kits are available as accessories.
Technical Specification
- Function: Thermal overload relay for motor protection against overload and phase failure with trip class 10.
- Voltage Ratings: Main circuit up to 690 V AC, 600 V DC; Auxiliary circuit up to 600 V AC/DC.
- Current Setting Range: 16 to 20 A, rated operational current 20 A.
- Contact Configuration: 1 normally closed (NC) trip contact and 1 normally open (NO) signal contact.
- Insulation Voltage (Ui): 690 V, Rated impulse withstand voltage (Uimp): 6 kV for auxiliary and main circuits.
- Degree of Protection: IP20.
- Terminal Type and Size Range: Flexible and rigid cables, 0.75 to 4 mm²; ferrules supported.
- Tightening Torque: Auxiliary circuit 1-1.2 N·m, Main circuit 1.5-2.5 N·m.
- Compatibility: Suitable for AF09, AF12, AF16, AF26, AF30, AF38 contactors.
Trusted By Customers Worldwide
"Specified by UK panel builders for dependable control." Controls Engineer, UK
Frequently Asked Questions
What is the function of the TF42-20 thermal overload relay?
The TF42-20 thermal overload relay provides protection for motors against overload and phase failure, featuring a trip class of 10.
What is the current setting range for the TF42-20?
The current setting range for the TF42-20 is 16 to 20 A, with a rated operational current of 20 A.
What voltage ratings does the TF42-20 support?
The TF42-20 supports main circuit voltage ratings up to 690 V AC and 600 V DC, and auxiliary circuit ratings up to 600 V AC/DC.
What type of contacts does the TF42-20 have?
The TF42-20 features 1 normally closed (NC) trip contact and 1 normally open (NO) signal contact.
Is the TF42-20 compatible with other contactors?
Yes, the TF42-20 is compatible with AF09, AF12, AF16, AF26, AF30, and AF38 contactors.
What is the degree of protection for the TF42-20?
The TF42-20 has a degree of protection rated at IP20.
What is the tightening torque for the terminals of the TF42-20?
The tightening torque for the auxiliary circuit is 1-1.2 N·m, and for the main circuit, it is 1.5-2.5 N·m.
| Manufacturer Part Number | 1SAZ721201R1049 |
|---|---|
| Amp Range | 16A - 20A |
| HS Code | 85364900 |
| Country of Manufacture | Germany |
| Manufacturer | ABB |
| Alternative Product SKU | TF42-20 |
| Barcode | 4016779764971 |
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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
