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ABB tf42-0.74 thermal overload relay 0.55a - 0.74a
MPN: 1SAZ721201R1021
Alt. SKU: TF42-0.74
Special Price
£45.98
£38.32
Regular Price
£70.74
Why Choose the TF42-0.74 [1SAZ721201R1021]
The TF42-0.74 thermal overload relay provides cost-effective electromechanical protection for motor control circuits. Designed to deliver reliable and rapid response to motor overloads and phase failure, it features a trip class 10 rating for standard industrial applications. Key functions include temperature compensation, a normally closed trip contact, a normally open signal contact, and selectable automatic or manual reset options. The device incorporates a trip-free mechanism, a dedicated STOP function, and clear trip indication for straightforward diagnostics. It is designed for direct mounting on matching block contactors, with single mounting kits available as optional accessories to ensure secure and compatible installation.
Technical Specification
- Function: Thermal overload relay with trip class 10, providing motor protection against overload and phase failure.
- Rated Operational Voltage: Main circuit 690 V AC, 600 V DC; auxiliary circuit 600 V AC/DC.
- Rated Operational Current: 0.74 A.
- Contact Configuration: 3-pole with 1 normally closed (NC) trip contact and 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, 0.75 to 4 mm² with ferrules; recommended screwdriver Pozidriv 2.
- Tightening Torque: Auxiliary circuit 1–1.2 N·m; main circuit 1.5–2.5 N·m.
- Mounting Compatibility: Suitable for contactors AF09, AF12, AF16, AF26, AF30, and AF38.
Trusted By Customers Worldwide
"Specified by UK panel builders for dependable control." Controls Engineer, UK
Frequently Asked Questions
What is the function of the TF42-0.74 thermal overload relay?
The TF42-0.74 thermal overload relay provides motor protection against overload and phase failure, featuring a trip class of 10.
What is the rated operational current of the TF42-0.74?
The rated operational current is 0.74 A.
What types of cables can be connected to the TF42-0.74?
The relay can accommodate flexible and rigid cables ranging from 0.75 to 4 mm² with ferrules.
Which contactors are compatible with the TF42-0.74?
The TF42-0.74 is suitable for contactors AF09, AF12, AF16, AF26, AF30, and AF38.
What is the degree of protection for the TF42-0.74?
The degree of protection is IP20.
What is the tightening torque for the terminals?
The tightening torque is 1–1.2 N·m for the auxiliary circuit and 1.5–2.5 N·m for the main circuit.
What standards and approvals does the TF42-0.74 comply with?
See the manufacturer's data sheet for standards and approvals.
| Manufacturer Part Number | 1SAZ721201R1021 |
|---|---|
| Amp Range | 0.55A - 0.74A |
| HS Code | 85364900 |
| Country of Manufacture | Germany |
| Manufacturer | ABB |
| Alternative Product SKU | TF42-0.74 |
| Barcode | 4013614398032 |
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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
