1. Introduction
The ALIENTEK T90C is a smart electric soldering iron designed for precision soldering tasks, offering adjustable temperature control, a digital display, and advanced features like automatic sleep and adaptive power. Its compact design and high power output make it suitable for various electronic repair and hobbyist applications.

Image: Smart and Portable T90C Soldering Iron features.
2. Safety Information
- Always wear appropriate eye protection when soldering.
- Ensure adequate ventilation in your workspace to avoid inhaling fumes.
- Do not touch the soldering iron tip when it is hot. It can cause severe burns.
- Place the soldering iron in a stable, heat-resistant stand when not in use.
- Keep out of reach of children and pets.
- Disconnect power when changing tips or performing maintenance.
- Use only compatible power supplies and accessories.
3. Package Contents
The standard package for the ALIENTEK T90C includes the following items:
- ALIENTEK T90C Soldering Iron
- KR Soldering Tip
- Type-C Cable
- Soldering Iron Stand
- Cleaning Sponge

Image: T90C Standard package contents.
Note: Other packages may include additional soldering tips (BC2, B2, ILS, BC3, K65) and a 140W power supply (EU, US, or UK specific).
4. Specifications
| Feature | Specification |
|---|---|
| Model Number | ALIENTEK T90C Soldering Iron |
| Input Voltage | PD3.1 9-28V |
| Output Temperature Range | 80-450℃ |
| Temperature Stability | +-2% |
| Output Power | 130W (MAX) |
| Display | IPS Color screen |
| Power Supply Interface | Type-C |
| Power Supply Method | Plug-in |
| Automatic Sleep | Yes |
| Automatic Shut-down | Yes |
| Adaptive Power | Yes |
| Certification | CE |
| Origin | Mainland China |
Image: Key features of the ALIENTEK T90C Smart Soldering Iron.
5. Setup
- Insert Soldering Tip: Carefully insert the desired soldering tip into the front end of the soldering iron handle. Ensure it is fully seated.
- Connect Power: Connect the Type-C cable to the soldering iron and then to a compatible PD3.1 power supply (9-28V). The power supply can be a PD fast charging head, power bank, or DC power adapter.
- Power On: Once connected, the soldering iron will power on and display the current status on its IPS color screen.

Image: Soldering tip insertion and display interface.

Image: PD Power Supply compatibility and performance table.
Setup Demonstration Video
Video: Unboxing and initial power-on of the ALIENTEK T90C Soldering Iron.
6. Operating Instructions
Temperature Adjustment
To adjust the temperature, click button A or B to enter the temperature adjustment UI. Release the button first, then click or long press to adjust the temperature. The setting will automatically return to the main UI after 3 seconds.
Manual Shutdown
Long press button B to enter the standby UI. The temperature will drop to 50 degrees Celsius, and then the machine will shut down.
Menu Operation
Click buttons A and B at the same time to enter the menu. Click A and B to slide through the menu options. Long press A to exit the menu, and long press B to enter the next menu item.
Parameter Setting
When in parameter setting mode, click A and B to increase or decrease the parameter value. Long press B to save the parameters and exit. Long press A will exit without saving changes.

Image: Detailed operating instructions for temperature, shutdown, and menu.
Automatic Features
- Automatic Sleep: The soldering iron features an inductive sleep mode, which activates after 30 minutes of inactivity to conserve energy and prolong tip life.
- Automatic Shut-down: After a period in sleep mode, the device will automatically shut down.
- Adaptive Power: The device intelligently adapts its power output based on the connected power supply to optimize heating performance.
7. Maintenance
- Tip Cleaning: Regularly clean the soldering tip using a damp sponge or brass wool to remove excess solder and oxidation. This ensures efficient heat transfer and extends tip lifespan.
- Tinning the Tip: After cleaning, always re-tin the tip with a small amount of fresh solder to prevent oxidation.
- Storage: When not in use, ensure the soldering iron is cooled down and stored in a dry, safe place. Use the protective cap if provided.
- General Cleaning: Wipe the body of the soldering iron with a soft, dry cloth. Do not use abrasive cleaners or solvents.
8. Troubleshooting
The T90C features a warning interface to indicate potential issues:

Image: Warning interface and error descriptions.
- NO Tip: Device failed to detect soldering iron tip.
- Ensure the soldering tip is correctly and fully inserted.
- Check for any damage to the tip or the iron's connection point.
- Vol low: Input voltage below 9V, heating function disabled.
- Verify that your power supply provides at least 9V.
- Ensure the Type-C cable is securely connected and not damaged.
- Use a PD3.1 compatible power supply.
- Tip res-Err: Abnormal resistance of iron tips.
- This indicates a potential issue with the soldering tip itself. Try replacing the tip with a new one.
- If the issue persists with multiple tips, contact customer support.
9. User Tips
- Pre-tinning Wires: Always pre-tin the ends of wires before attempting to solder them to components or PCBs. This helps create stronger, more reliable joints.
- Proper Temperature: Use the lowest effective temperature for your solder and components. Too high a temperature can damage components, while too low can result in cold solder joints.
- Cleanliness is Key: A clean soldering tip and clean work area are essential for good soldering results. Regularly clean your tip and remove any debris from your workspace.
- Practice Makes Perfect: If you're new to soldering, practice on scrap components or practice boards before working on important projects.
10. Warranty and Support
The ALIENTEK T90C Electric Soldering Iron comes with a commitment to quality and customer satisfaction.
- Free Returns: Enjoy free returns within 90 days of purchase.
- Fast Delivery Guarantee: In case of delayed delivery, a coupon code may be provided. Refunds are available if the package is lost or items are damaged during transit, or if no delivery occurs within 30 days.
For any technical assistance, warranty claims, or product inquiries, please contact the seller directly through the platform where you purchased the product. Provide your order details and a clear description of the issue for prompt support.






