What guidelines should you follow while selecting an electric soldering iron?
1. The shape of the soldering iron head can adapt to the surface requirements of the weldment and the assembly density of the product.
2. The temperature of the tip of the soldering iron tip needs to be compatible with the melting point of the solder, which generally needs to be 30-80°C higher than the melting point of the solder (excluding the temperature drop when the soldering iron tip touches the soldering point).
3. The heat capacity of the soldering iron must be appropriate, and the temperature recovery time of the soldering iron tip must be compatible with the requirements of the surface of the welded object.
The temperature recovery time refers to the time required for the temperature at the tip of the soldering iron tip to return to the highest temperature after it decreases due to heat loss during the soldering cycle. It is related to the power of the electric soldering iron, heat capacity, and the shape and length of the soldering iron tip.
Principles for choosing the power of an electric soldering iron
1. When soldering integrated circuits, transistors and other components that are vulnerable to heat, consider using a 20W internal heating or 25W external heating electric soldering iron.
2. When welding thicker wires and 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 of 100W or more should be selected.
