Is it better to use a high-power soldering iron or a low-power one?
There are many kinds of power of electric irons, the smaller ones are 15 watts and 20 watts, the larger ones are 200 watts and 300 watts, and there are also pistol-type 500 watts. When performing welding work, the power of the soldering iron must be determined according to the welding object, and sometimes the power of the electric iron must be selected according to the climate season (winter, summer). When welding electronic components, just use 15 to 20 watts. If you use 500 watts, once the soldering iron is put down, it will be a black hole, which is of course not good.
Whether the power selection is appropriate mainly depends on the melting and flow of solder. This process does not take more than three seconds. If it is too long, it will damage the electronic components. If it is too short, the welding will not be reliable and the solder joints will not be smooth.
Generally, when welding small components such as resistors, capacitors, transistors, and manifolds, it is advisable to use a 20-watt soldering iron. In winter, increase the power level by 25 watts. When welding large-foot components such as heat sinks, transformers, shields, or grounding large-area copper plates, 35 watts to 40 watts should be used. Therefore, the power of the soldering iron must be appropriately selected according to the object being welded. There is no such thing as high power or low power.
Introduction to the principles of electric soldering iron
Welding is a condition where only a small amount of tin is soldered at the solder joint, resulting in poor contact and occasional on and off. False welding means that it seems to be welded on the surface, but in fact it is not. Sometimes the lead can be pulled out from the solder joint by pulling it out by hand. These two situations will bring great difficulties to the debugging and maintenance of electronic production. Both of these situations can only be avoided with extensive, careful welding practice. When welding circuit boards, be sure to control the time. If it is too long, the circuit board will be burned or the copper foil will fall off. When removing components from the circuit board, you can stick the soldering iron tip on the solder joint and pull out the component after the tin on the solder joint melts. The temperature of the soldering iron has a certain relationship with the volume, shape, length, etc. of the soldering iron tip. When the volume of the soldering iron tip is relatively large, the holding time will be longer. In addition, in order to adapt to the requirements of different welding objects, the shapes of soldering iron tips are different. Common ones include cone, chisel, circular bevel, etc.
