The ABB TF140DU-142 is a thermal overload relay of the TF range – Thermal Overload Relay 110-142 A, Class 10A, 1NO+1NC. ABB order code: 1SAZ431201R1004.
TF thermal overload relays protect motors against overload and phase failure: bimetal strips heated by the motor current trip the auxiliary contact, which opens the contactor coil circuit. They mount directly under AF contactors.
More ABB contactors, overload relays and control parts: ABB range.
Technical data
| ABB type | TF140DU-142 |
|---|---|
| ABB order code | 1SAZ431201R1004 |
| Product Name | Thermal Overload Relay |
| Rated Operational Current AC-3 | 140 A |
| Number of Auxiliary Contacts NO | 1 |
| Number of Auxiliary Contacts NC | 1 |
| Setting Range | 110 … 142 A |
| Rated Operational Current | 140 A |
| Trip Class | class 10A |
| Rated Operational Voltage | Auxiliary Circuit 440/500 V DC/V AC Main Circuit 690 V AC |
| Rated Insulation Voltage | 690 V |
| Rated Impulse Withstand Voltage | Auxiliary Circuit 6 kV Main Circuit 8 kV |
| Number of Poles | 3 |
| Number of Protected Poles | 3 |
| Suitable For | AF116 AF140 |
| Conventional Free-air Thermal Current | Auxiliary Circuit NC 10 A Auxiliary Circuit NO 6 A |
| Rated Frequency | Auxiliary Circuit 50 Hz Auxiliary Circuit 60 Hz Auxiliary Circuit DC Main Circuit 60 Hz Main Circuit 50Hz Main Circuit DC |
| Degree of Protection | Housing IP20 Main Circuit Terminals IP10 |
| Wire Stripping Length | Auxiliary Circuit 9 mm Main Circuit 25 mm |
| Tightening Torque | Auxiliary Circuit 0.8 … 1.2 N·m Main Circuit 8 … 10 N·m |
| Mounting Position | Position 1 to 5 |
| Power Loss | at Rated Operating Conditions per Pole 3.1 … 5.1 W |
Key data (per ABB)
- Setting Range: 110 … 142 A
- Trip Class: class 10A
- Suitable For: AF116 AF140
- Rated Operational Current AC-3: 140 A
- Ambient Air Temperature Compensation: Yes
Typical applications
- Conveyors and machine motors
- Pumps, fans and compressors
- Star-delta starters
- Replacement of a failed overload relay
- Direct-on-line motor starters with AF contactors
Compatibility and replacement
Order with the full type TF140DU-142 or the order code 1SAZ431201R1004; in ABB type designations the last digits select the current range or the coil voltage, so a part with a different suffix is not always a drop-in replacement.
If the old label is worn, send us a photo and we will confirm the matching ABB type before quoting.
What to check first
- Trip class
- Contactor size it mounts on
- Setting range versus the motor full-load current
Frequently asked questions
Which standards does it meet?
IEC/EN 60947-1 IEC/EN 60947-4-1 IEC/EN 60947-5-1 UL 60947-1 UL 60947-4-1, according to ABB’s product data.
What ambient temperature is allowed?
Operation -25 … +55 °C Operation Compensated -25 … +55 °C Storage -40 … +70 °C, according to ABB’s product data.
What is the AC-3 rating?
140 A, according to ABB’s product data.
Can you help me identify the right replacement?
Yes. Send us a photo of the label of the old part, or its full order code, and we will confirm the exact match or the official successor before quoting.
How fast can you deliver, and is there a warranty?
Air shipping usually takes 5 to 7 days once the part is ready, to almost any country. Each part is new and original with a 1-year warranty. Message us on WhatsApp with the order number for a quotation.
Ordering tips
Send us the full order number from the label of the old part, or a clear photo of the label, together with the quantity you need. We check the number against the current manufacturer data before we quote and tell you if there is a newer replacement.
RendatSP ships from Yiwu, China, to factories worldwide; air delivery usually takes 5 to 7 days once the part is ready. The part is new and original with a 1-year warranty (shipping, payment and warranty). For a quotation, message us on WhatsApp with the order number and quantity. We also have agents in Saudi Arabia, Iraq, the UAE, Egypt, Oman, Libya, Morocco, Mauritania, Yemen, Algeria and Jordan.
