Why is a low power soldering iron suitable for electronics work?

When working on PC boards or any electronic equipment, heat is the biggest enemy. A low wattage soldering iron is the best because it will generate only enough heat to melt the solder and not heat up other adjacent components that are near to the point that you are soldering. Also when working on electronic equipment use a solder with a low melting point. There is a special low temperature solder with a rosin core that is made especially for PC boards. Never use acid core solder on any electrical soldering jobs.