Electric soldering iron is better to use with internal heat or external heat
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.
In terms of usage
The tip of an external heating electric soldering iron is inside the heating element, also known as a regular electric soldering iron. For welding ordinary products, there are no temperature requirements and an external heating electric soldering iron is used. Due to the fact that the heating resistor wire is located outside the soldering iron tip, most of the heat is dissipated to the external space, resulting in low heating efficiency and slow heating speed. Generally, preheating takes 6-7 minutes before welding. Its large volume makes it inconvenient to solder small components. But it has the advantages of longer usage time and higher power of the soldering iron tip.
Internal heating electric soldering iron, the shape of the soldering iron tip used for internal heating electric soldering iron is a hollow cylinder, and the heating element is covered by the soldering iron tip, so that its heat is not easily dissipated into the air, so the heat utilization efficiency is high, the preheating time is short, and the power generally does not need to be too large to meet the requirements. Generally, the internal heating power is below 50W, and the common internal heating electric soldering iron is around 20W~30W. There are both single handle and soldering station options. The 936 soldering station is a typical internal heating soldering iron, but it is also temperature controlled. Now they are all lead-free soldering irons (lead-free soldering stations), which are better to use than the previous two.
