What should be paid attention to when purchasing electric soldering iron
According to the choice of electric soldering iron heating form
1. Choice of internal heating and external heating: Under the same wattage, the temperature of the internal heating soldering iron is higher than that of the external heating soldering iron.
2. When low-temperature soldering is required, use a voltage regulator to control the temperature of the electric soldering iron. The temperature of the electric soldering iron is closely related to the power supply voltage. In actual use, the temperature of the electric soldering iron is often lowered by lowering the power supply voltage.
3. Control the temperature by adjusting the extension length of the soldering iron tip.
4. There are mainly the following methods to stabilize the temperature of the electric soldering iron: install a stabilized power supply to prevent changes in the power supply network; maintain a certain volume, length and shape of the soldering iron head; use a constant temperature electric soldering iron; keep the indoor temperature constant; avoid natural wind or Electric fan etc.
According to the choice of soldering iron power
1. When soldering small wattage resistance-capacitance components, transistors, integrated circuits, pads of printed circuit boards or plastic wires, it is advisable to use a 30-45W external heating type or a 20W internal heating type electric soldering iron. It is best to use a 20W internal heating type electric soldering iron in the application.
2. When welding the welding points of general structural products, such as wire rings, wire claws, heat sinks, grounding soldering pieces, etc., it is advisable to use a 75~100W electric soldering iron.
3. For large solder joints, such as welding metal rack tabs, solder tabs, etc., it is advisable to use a 100~200W electric soldering iron.
