There are various types of power for electric iron, with smaller ones ranging from 15 watts to 20 watts, larger ones ranging from 200 watts to 300 watts, and pistol style ones ranging from 500 watts. When carrying out welding work, the power of the soldering iron must be determined based on the welding object, and sometimes the power of the electric iron must be selected according to the climate season (winter, summer). Welding electronic components, using 15 to 20 watts is good, using 500 watts, one soldering iron will create a black hole, of course not good.

For general welding of small foot components such as resistors, capacitors, transistors, and integrated blocks, it is recommended to use a 20 watt soldering iron. In winter, it should be increased by one level and a 25 watt soldering iron should be used. When welding large foot components such as heat sinks, transformers, and shielding shields, or grounding large areas with copper plates, it is recommended to use 35 watts to 40 watts. So, it is important to choose the appropriate power of the soldering iron based on the welding object, and there is no distinction between high power and low power.

The power of an electric soldering iron should be determined by the size of the solder joint. The area of the solder joint is large, and the heat dissipation speed of the solder joint is also fast. Therefore, the power of the selected electric soldering iron should also be higher. The power of a general electric soldering iron is 20W, 25W, 30W, 35W, 50W, and so on. Choosing a power of around 30W during the production process is more appropriate.