The effectiveness of our soldering iron tips in electronic lead-free soldering can be greatly increased by selecting a suitable electric soldering iron, but in general, the choice should be made based on the actual situation of the object to be soldered, generally focusing on heating form, power size, soldering iron tip shape, etc.
Depending on the electric soldering iron's chosen heating method
1. When comparing internal and external heating, interior heating produces a higher temperature than external heating does at the same wattage.
2. A voltage regulator should be used to regulate the temperature of the electric soldering iron when low temperature welding is necessary. The voltage of the power source has a direct impact on the temperature of the electric soldering iron. In practical operation, lowering the power supply voltage frequently results in a decrease in the temperature of the electric soldering iron.
3. Adjust the soldering iron tip's extension length to control the temperature.
4. The following are the major techniques for maintaining the soldering iron's temperature: use a constant temperature soldering iron; maintain a consistent interior temperature; eliminate natural wind or fans; establish a controlled power supply to prevent variations in the power supply network.
Depending on the soldering iron's selected power
1. It is recommended to use an electric soldering iron with an external heating range of 30 to 45 W or an internal heating range of 20 W when joining small wattage resistance-capacitance components, transistors, integrated circuits, pads, or plastic wires of printed circuit boards. It is advisable to utilize a 20W internal heating electric soldering iron for the purpose.
2. A 75–100W electric soldering iron should be used to weld the welding points of general structural items including wire loops, wire claws, heat sinks, grounding pads, etc.
3. A 100–200W electric soldering iron should be used for big solder joints, such as welding metal frame tabs, solder tabs, etc.
