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ABB tf42-1.0 thermal overload relay 0.74a - 1.0a
MPN: 1SAZ721201R1023
Alt. SKU: TF42-1.0
Special Price
£44.21
£36.84
Regular Price
£68.02
Why Choose the TF42-1.0 [1SAZ721201R1023]
The TF42-1.0 thermal overload relay provides cost-effective electromechanical protection for motor main circuits. Designed to deliver reliable and rapid response to overload conditions and phase failure, it features a trip class 10 rating. Key technical attributes 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 compatible with direct mounting on block contactors, with single mounting kits available separately to facilitate installation.
Technical Specification
- Function: Thermal overload relay providing reliable motor protection against overload and phase failure with trip class 10.
- Rated Operational Voltage: Main Circuit 690 V AC / 600 V DC; Auxiliary Circuit 600 V AC/DC.
- Rated Operational Current: 1 A.
- Contact Configuration: 3 poles; 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 (main and auxiliary circuits).
- Degree of Protection: IP20.
- Terminal Type and Size Range: Terminals accept flexible or rigid cables with ferrules from 0.75 to 4 mm².
- Tightening Torque: Auxiliary circuit 1–1.2 N·m; main circuit 1.5–2.5 N·m.
- Mechanical Features: Trip-free mechanism, selectable automatic or manual reset, STOP function, and trip indication.
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"Specified by UK panel builders for dependable control." Controls Engineer, UK
Frequently Asked Questions
What is the function of the TF42-1.0 thermal overload relay?
The TF42-1.0 thermal overload relay provides reliable protection for motors against overload and phase failure, with a trip class of 10.
What is the rated operational voltage for this relay?
The rated operational voltage is 690 V AC for the main circuit and 600 V DC; for the auxiliary circuit, it is 600 V AC/DC.
What is the cable capacity for the terminals?
The terminals accept flexible or rigid cables with ferrules from 0.75 to 4 mm².
Can the relay be reset manually?
Yes, the TF42-1.0 thermal overload relay has a selectable automatic or manual reset feature.
What is the degree of protection for this relay?
The degree of protection is IP20.
How is the relay mounted?
The relay can be connected directly to block contactors, and single mounting kits are available as an accessory.
What should I refer to for standards and approvals?
See the manufacturer's data sheet for standards and approvals.
| Manufacturer Part Number | 1SAZ721201R1023 |
|---|---|
| Amp Range | 0.74A - 1.0A |
| HS Code | 85364900 |
| Country of Manufacture | Germany |
| Manufacturer | ABB |
| Alternative Product SKU | TF42-1.0 |
| Barcode | 4013614398049 |
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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
