[Terry C]

Originally Posted by j4c11

It is basically a transistor. Instead of putting all the amperage through the points, the transistor takes over the job of collapsing the field and instead you just run a few milliamps through the points which now have the single job of telling the transistor when to open and close. By reducing the amperage at the points by a factor of thousands, it prevents arcing and corrosion thus "saving" the points.

Thanks for the explaination.