Is it better to heat the soldering iron from the inside or from the outside?
Firstly, it cannot be absolutely said that it is good, it depends on what your purpose is: welding small parts, such as electronic components, with good internal heating; 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 external heating 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: low-power soldering irons are generally internally heated and suitable for soldering small parts. The power for soldering semiconductor devices and integrated circuits shall not exceed 30W. High power soldering irons are usually externally heated and used for soldering larger parts. The larger the metal area, the greater the power of the soldering iron used.
Fourth, the heating speed is different: the internal heating type heats up faster, has a larger head, shorter lifespan, and is usually small in capacity; External heating system heats up slower, has a smaller head, longer lifespan, and can be used for larger capacities.
Definition of Internal Heating Electric Soldering Iron
The thermal element is located inside the soldering copper head "or explained as" its soldering iron head is placed outside the heating element ", allowing heat to be transferred 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 soldering iron tip, it is prone to oxidation and blackening, and the soldering iron core is easily broken. Moreover, the power is low, with only a few specifications such as 20W, 35W, and 50W.
Definition of External Heating Electric Soldering Iron
External heat refers to the heat generated outside, named after the heating resistor located outside the soldering iron tip. It is suitable for welding both large and small components. There are 25W, 30W, 50W, 75W, 100W, 150W, 300W, etc.
