Genuine ABB TF42-4.2, order code 1SAZ721201R1035: Thermal Overload Relay 3.1-4.2 A, Class 10, 1NO+1NC.
The TF range is the overload relay series designed for ABB AF contactors; the setting dial covers a current band, so the replacement must have the band that contains the motor full-load current.
More ABB contactors, overload relays and control parts: ABB range.
Technical data
| ABB type | TF42-4.2 |
|---|---|
| ABB order code | 1SAZ721201R1035 |
| Product Name | Thermal Overload Relay |
| Rated Operational Current AC-3 | 4.2 A |
| Number of Auxiliary Contacts NO | 1 |
| Number of Auxiliary Contacts NC | 1 |
| Setting Range | 3.1 … 4.2 A |
| Rated Operational Current | 4.2 A |
| Trip Class | class 10 |
| Rated Operational Voltage | Auxiliary Circuit 600 V AC / DC Main Circuit 690 V AC |
| Rated Insulation Voltage | 690 V |
| Rated Impulse Withstand Voltage | Auxiliary Circuit 6 kV Main Circuit 6 kV |
| Number of Poles | 3 |
| Number of Protected Poles | 3 |
| Suitable For | AF09 AF12 AF16 AF26 AF30 AF38 |
| Conventional Free-air Thermal Current | Auxiliary Circuit NC 6 A Auxiliary Circuit NO 4 A |
| Rated Frequency | Auxiliary Circuit 50 Hz Auxiliary Circuit 60 Hz Auxiliary Circuit DC Main Circuit 50Hz Main Circuit 60 Hz |
| Degree of Protection | IP20 |
| Wire Stripping Length | Auxiliary Circuit 9 mm Main Circuit 12 mm |
| Tightening Torque | Auxiliary Circuit 1 … 1.5 N·m Main Circuit 1.5 … 2.5 N·m |
| Mounting Position | Position 1 to 5 |
| Power Loss | at Rated Operating Conditions per Pole 1.1 … 2.0 W |
At a glance
- Setting Range: 3.1 … 4.2 A
- Trip Class: class 10
- Suitable For: AF09 AF12 AF16 AF26 AF30 AF38
- Rated Operational Current AC-3: 4.2 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 TF42-4.2 or the order code 1SAZ721201R1035; 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.
All values in the table are from ABB’s official product data; if your old unit differs, send a photo of its label and we will check it.
What to check first
- Trip class
- Reset mode (manual/automatic)
- Setting range versus the motor full-load current
Frequently asked questions
What trip class does it have?
Class 10, according to ABB’s product data.
What ambient temperature is allowed?
Operation -25 … +60 °C Operation Compensated -25 … +60 °C Storage -50 … +80 °C, according to ABB’s product data.
What is the setting range?
3.1 … 4.2 A, according to ABB’s product data.
Can I get the datasheet?
The official manufacturer data is the source of the technical values above; we can send the datasheet with the quotation on request.
Do you ship to my country, and what is the warranty?
Yes. RendatSP ships worldwide from Yiwu, China, by air in 5 to 7 days once the part is ready, and every part carries a 1-year warranty. Send the order number and quantity on WhatsApp and we will reply with a quotation.
Before you order
Compare the complete order number on the old unit with this page, including the suffix: in most ranges the last characters set the coil voltage, current range or version. If the label is worn, send us a photo and we will identify the part.
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.
