The power of the soldering iron has little to do with the temperature. The greater the power, the larger the solder joints that can be soldered. Some soldering parts with faster heat conduction also need to use a high-power soldering iron. According to the formula: heat=power * time, the greater the power, the better. It is said that the shorter the time to make the weldment reach equal heat, it has nothing to do with the set temperature of the soldering iron. At present, electric soldering irons are mainly divided into two types: external heating type and internal heating type. Under these two categories, there are also many specifications of electric soldering irons according to different powers. For the external heating type, the higher the power, the higher the temperature of the electric iron tip, and the power of the internal heating type is different from that of the external heating type.

There are two types of electric soldering irons: internal heating type and external heating type. There are mainly 20, 30, 35, 45, 50, 75W types of internal heating electric soldering irons. In addition to all the wattages of the internal heating type soldering iron, there are several types of 100, 150, 300W and so on. Choice of internal heating and external heating: Under the same wattage, the temperature of the internal heating soldering iron is higher than that of the external heating soldering iron.

30W: suitable for mobile phones, MP3, and other products with small solder joints

40W: Suitable for Xiaobawang game controllers, handheld game consoles, etc.

60W: Suitable for home appliances such as TVs, stereos, keyboards, tape recorders, radios, electric fans, and game joysticks. At the same time, it covers all electrical appliances suitable for 30W and 40W. It can be used for maintenance of all household appliances.

Some high-current solder joints need to be tinned more, too low power will cause too fast heat dissipation, and the solder joints are not easy to tin or appear semi-liquid. The disadvantage of high-power soldering iron is that it has a short service life and cannot be powered on for a long time. It is relatively troublesome to maintain, and it is easy to burn components and boards if the technology is not good. So choose a soldering iron with the right power according to your own requirements.