As electronic equipment becomes smaller, the circuits and components become more delicate and easily damaged. Fuses are the preferred method of protection due To their accuracy, small size and reliability. Fuses are available in a Wide variety of ampere ratings to provide precise protection. Generally, two sizes of user-replaceable fuses are found the 1/4 inch x 1-1/4 inch and 5 x 20 millimeter. Each is available in a variety of volt and amp ratings.