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ABB tf42-5.7 thermal overload relay 4.2a - 5.7a
MPN: 1SAZ721201R1038
Alt. SKU: TF42-5.7
Special Price
£44.21
£36.84
Regular Price
£68.02
Why Choose the TF42-5.7 [1SAZ721201R1038]
The TF42-5.7 thermal overload relay provides cost-effective electromechanical protection for motor main circuits. It delivers dependable and rapid response to overload conditions and phase failure, with a trip class 10 rating ensuring timely disconnection. Key features include temperature compensation, normally closed trip contacts, normally open signal contacts, and selectable automatic or manual reset options. The device incorporates a trip-free mechanism, integrated STOP function, and clear trip indication for straightforward diagnostics. Designed for direct mounting onto block contactors, compatible single mounting kits are available as accessories to facilitate installation.
Technical Specification
- Function: Thermal overload relay with trip class 10 for motor protection against overload and phase failure.
- Rated Operational Voltage: Main circuit 690 V AC / 600 V DC; Auxiliary circuit 600 V AC/DC.
- Setting Range: 4.2 to 5.7 A.
- Contact Configuration: 3 poles protected; 1 normally closed (NC) trip contact; 1 normally open (NO) signal contact.
- Insulation & Impulse Withstand Voltage: Rated insulation voltage 690 V; impulse withstand voltage 6 kV for both main and auxiliary circuits.
- Degree of Protection: IP20.
- Terminal Types & Sizes: Flexible or rigid cables, 0.75 to 4 mm² with ferrule or insulated ferrule options.
- Tightening Torque: Auxiliary circuit 1–1.2 N·m; main circuit 1.5–2.5 N·m.
- Additional Features: Selectable automatic/manual reset, trip-free mechanism, STOP function, and trip indication.
Trusted By Customers Worldwide
"Specified by UK panel builders for dependable control." Controls Engineer, UK
Frequently Asked Questions
What is the primary function of the TF42-5.7 thermal overload relay?
The TF42-5.7 thermal overload relay provides protection for motors against overload and phase failure.
What is the rated operational voltage for the TF42-5.7?
The rated operational voltage is 690 V AC / 600 V DC for the main circuit and 600 V AC/DC for the auxiliary circuit.
What is the setting range for the current on the TF42-5.7?
The setting range for the current is 4.2 to 5.7 A.
What types of cables can be used with the TF42-5.7?
Flexible or rigid cables from 0.75 to 4 mm² can be used, with options for ferrule or insulated ferrule connections.
How is the TF42-5.7 mounted?
The overload relay can be mounted directly to block contactors, with single mounting kits available as accessories.
What is the degree of protection for the TF42-5.7?
The degree of protection is IP20.
What safety standards does the TF42-5.7 comply with?
See the manufacturer's data sheet for standards and approvals.
| Manufacturer Part Number | 1SAZ721201R1038 |
|---|---|
| Amp Range | 4.2A - 5.7A |
| HS Code | 85364900 |
| Country of Manufacture | Germany |
| Manufacturer | ABB |
| Alternative Product SKU | TF42-5.7 |
| Barcode | 4013614398100 |
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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
