Is an electric soldering iron better for internal heating or external heating
Firstly, it cannot be absolutely said that it is good, it depends on your purpose: welding small parts, such as electronic components, with good internal heat; Welding large parts, easy to use with external heat.
Secondly, the structure is different: the internal heating element is located inside the copper head, and its thermal efficiency is relatively high; The externally heated electric wire is located outside the copper head, and the power of the soldering iron is related to the area of the metal being welded.
Thirdly, in terms of power: Small power soldering irons are generally internally heated and suitable for welding small parts. The power required for soldering semiconductor devices and integrated circuits shall not exceed 30W. High power soldering irons are generally externally heated for welding larger components. The larger the metal area, the greater the power of the soldering iron used.
Fourthly, the heating speed is different: the internal heating type heats up quickly, has a large head, a short lifespan, and is usually small in capacity; External heating has a slower heating speed, smaller head, longer lifespan, and can be used for larger capacity.
Definition of internally heated electric soldering iron
The thermal element is located inside the solder copper head, or is explained as "its soldering iron head is placed outside the heating element," which transfers heat from the inside to the soldering iron head. It has the advantages of fast heating, high heating efficiency, small size, light weight, low power consumption, and flexible use. Suitable for soldering small components. However, due to the high temperature of the electric soldering iron head, it is prone to oxidation and blackening, and the soldering iron core is easily broken. Moreover, the power is small, with only a few specifications such as 20W, 35W, 50W, etc.
Definition of externally heated electric soldering iron
External heating refers to heating outside, which is named after the heating resistance outside the soldering iron head. It is suitable for welding both large components and small components. There are 25W, 30W, 50W, 75W, 100W, 150W, 300W, etc.
