Description
The ABB TF42-1.0 Thermal Overload Relay (1SAZ721201R1023) is an electromechanical motor protection device designed to protect three-phase motors against overload conditions and phase failure. Featuring an adjustable current setting range of 0.74 to 1.0 A and a Class 10 trip characteristic, it provides reliable protection for compatible motor starter applications.
Part of ABB’s TF42 series, this thermal overload relay features ambient temperature compensation to maintain consistent protection across its specified operating temperature range. It includes one normally closed (NC) trip contact and one normally open (NO) signal contact, along with selectable manual or automatic reset, a trip-free mechanism, a STOP function, and trip indication.
The TF42-1.0 mounts directly onto compatible ABB AF series contactors, including AF09, AF12, AF16, AF26, AF30, and AF38 models. For installations requiring separate mounting, compatible single-mounting kits are available as accessories. Its compact design makes it suitable for industrial motor control panels, machinery, and electrical automation systems.
Key Features
- Adjustable Current Range: Offers overload protection settings from 0.74 to 1.0 A for compatible motor applications.
- Class 10 Trip Characteristic: Provides a Class 10 overload response for suitable motor protection applications.
- Overload and Phase Failure Protection: Helps protect motors against sustained excessive current and phase failure.
- Ambient Temperature Compensation: Maintains protection performance across the specified operating temperature range.
- Auxiliary Contacts: Includes one normally closed (NC) trip contact and one normally open (NO) signal contact for control and signaling applications.
- Selectable Reset: Supports manual or automatic reset depending on the selected configuration.
- Trip-Free Mechanism: Helps ensure the relay trips under fault conditions regardless of manual reset or operating action.
- STOP Function and Trip Indication: Supports convenient operation, status monitoring, and troubleshooting.
- AF Series Contactor Compatibility: Designed for direct mounting on compatible ABB AF09, AF12, AF16, AF26, AF30, and AF38 contactors.
- Separate Mounting Option: Compatible single-mounting kits are available for installations where the relay must be mounted separately.
Specifications
| Technical Specification | Detail |
|---|---|
| Product Model | TF42-1.0 |
| Product ID (SKU) | 1SAZ721201R1023 |
| Brand / Manufacturer | ABB |
| Product Series | TF42 |
| Product Type | Thermal Overload Relay |
| Setting Range | 0.74–1.0 A |
| Rated Current | 1 A |
| Number of Poles | 3 |
| Trip Class | Class 10 |
| Auxiliary Contact Configuration | 1 NC + 1 NO |
| Rated Operational Voltage, Main Circuit | 690 V AC |
| Rated Operational Voltage, Auxiliary Circuit | 600 V AC/DC |
| Maximum Operating Voltage (UL/CSA), Main Circuit | 600 V AC |
| Rated Insulation Voltage | 690 V |
| Rated Impulse Withstand Voltage | 6 kV |
| Mounting Type | Direct Contactor Mounting |
| Compatible Contactors | ABB AF09, AF12, AF16, AF26, AF30, and AF38 |
| Reset Options | Manual or Automatic, Selectable |
| Ambient Temperature Compensation | Yes |
| Operating Temperature | -25°C to +60°C |
| Storage Temperature | -50°C to +80°C |
| Degree of Protection | IP20 |
| Main Circuit Conductor Capacity | 0.75–4 mm² |
| Auxiliary Circuit Conductor Capacity | Up to 4 mm², depending on conductor type and configuration |
| Recommended Maximum gG Fuse Rating | 6 A |
| Product Width | 45 mm |
| Product Height | 88.3 mm |
| Product Depth | 70.5 mm |
| Net Weight | 0.13 kg |
| Applicable Standards | IEC/EN 60947-1, IEC/EN 60947-4-1, IEC/EN 60947-5-1, UL 60947-1, UL 60947-4-1 |
| EAN | 4013614398049 |
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