This is a great question, and one most beginners have. If you need a soldering iron specifically for use on electronics, then you’ll want to shop around and look for one that offers twenty watts to sixty watts. However, it’s also common to use models that offer fifty watts, which will provide the type of heat that’s needed to solder on circuit boards. Keep in mind, for this specific type of application, a model with a higher wattage in the forty-watt to sixty-watt range will be the best choice.