4 points for choosing an electric soldering iron
(1) When soldering integrated circuits, transistors and components that are vulnerable to heat, consider using a 20W internal heating or 25W external heating electric soldering iron.
(2) When welding thicker wires or coaxial cables, consider using a 50W internal heating type or a 45-75W external heating type electric soldering iron.
(3) When soldering larger components, such as metal chassis grounding pads, an electric soldering iron above 100W should be used.
(4) The shape of the soldering iron tip should adapt to the surface requirements of the welded parts and the assembly density of the product.
To put it simply, the power and type of the soldering iron should be reasonably selected according to the welding object. If the weldment is larger, the power of the soldering iron used should be higher. If the power is small, the soldering temperature will be too low and the solder will melt slowly. The flux is not easy to volatilize, and the solder joints are not smooth and firm, which will inevitably lead to unqualified appearance quality and welding strength, and even the solder cannot be melted, and the welding cannot be carried out. However, the power of the electric soldering iron should not be too large. If it is too large, too much heat will be transferred to the workpiece to be welded, and the solder joints of the components will be overheated, which may cause damage to the components, and the copper foil of the printed circuit board will fall off and the solder will be damaged. The flow on the welding surface is too fast and cannot be controlled, etc.
