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ABB tf42-0.55 thermal overload relay 0.41a - 0.55a
MPN: 1SAZ721201R1017
Alt. SKU: TF42-0.55
Special Price
£45.98
£38.32
Regular Price
£70.74
Why Choose the TF42-0.55 [1SAZ721201R1017]
The TF42-0.55 thermal overload relay provides cost-effective electromechanical protection for motor circuits, ensuring reliable and rapid response to overloads and phase failures. Rated with a trip class 10, it incorporates temperature compensation for accurate operation under varying conditions. Key features include a normally closed trip contact, a normally open signal contact, selectable automatic or manual reset, a trip-free mechanism, a dedicated STOP function, and clear trip indication. Designed for direct mounting onto compatible block contactors, the relay can be installed efficiently with available single mounting kits as accessories.
Technical Specification
- Function: Thermal overload relay providing fast and reliable motor protection against overload and phase failure.
- Setting Range: 0.41 to 0.55 A.
- Voltage Ratings: Main circuit 690 V AC / 600 V DC; Auxiliary circuit 600 V AC/DC.
- Current Rating: Rated operational current 0.55 A.
- Contact Configuration: 3 poles; 1 NC (normally closed) trip contact; 1 NO (normally open) signal contact.
- Insulation & Impulse Withstand Voltage: Rated insulation voltage 690 V; Rated impulse withstand voltage 6 kV (main and auxiliary circuits).
- Degree of Protection: IP20.
- Terminal Type and Capacity: Flexible and rigid cables; main circuit 0.75–4 mm²; auxiliary circuit 0.75–2.5 mm².
- Tightening Torque: Main circuit 1.5–2.5 N·m; Auxiliary circuit 1–1.2 N·m.
- Mechanical Features: Trip-free mechanism with selectable automatic or manual reset, 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 function of the TF42-0.55 thermal overload relay?
The TF42-0.55 thermal overload relay provides fast and reliable protection for motors against overload and phase failure.
What is the current setting range for this relay?
The setting range for the TF42-0.55 thermal overload relay is 0.41 to 0.55 A.
What are the voltage ratings for the main and auxiliary circuits?
The main circuit voltage rating is 690 V AC / 600 V DC, and the auxiliary circuit voltage rating is 600 V AC/DC.
What is the degree of protection for this relay?
The TF42-0.55 has a degree of protection rated at IP20.
What type of cables can be connected to the relay?
The relay can accommodate flexible and rigid cables; main circuit cables from 0.75 to 4 mm² and auxiliary circuit cables from 0.75 to 2.5 mm².
Is there a manual reset option available?
Yes, the TF42-0.55 features a selectable automatic or manual reset option.
What standards and approvals does this relay conform to?
See the manufacturer's data sheet for standards and approvals.
| Manufacturer Part Number | 1SAZ721201R1017 |
|---|---|
| Amp Range | 0.41A - 0.55A |
| HS Code | 85364900 |
| Country of Manufacture | Germany |
| Manufacturer | ABB |
| Alternative Product SKU | TF42-0.55 |
| Barcode | 4013614398025 |
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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
