SUGON T21 Soldering Iron

Two technicians sharing a bench often grab the wrong iron. The SUGON T21 comes in red or phantom black, so each person can have their own, and it's rated 120 W with a range of 100 to 450°C (212 to 842°F).

The listing describes a digital display with real-time temperature, a lightweight heat-resistant handle, interchangeable tips and an auto-sleep function. It doesn't list voltage, plug, tip system or contents.

Where it fits

• Damaged charge connectors with mixed pin sizes.

• Shorted parts on a ground plane.

• Loose wires in battery or speaker leads.

• Broken traces needing a jumper.

Tips

Set a moderate temperature and let the 120 W hold it, rather than turning it up. Clean the tip on brass wool and tin it before it sleeps. Match the tip to the job: a broad chisel for ground pads and connector anchors, a finer point for jumpers and small leads.

Compared with the 75 W T16 it recovers faster on heavy joints, while the 150 W T1602 goes further still. Check the voltage before you order, and ask which tips ship with it.