The Optifuse FSF-2A is a two-ampere, 250 Volt AC fuse with a glass body that measures 3.6 x 10 mm in size and is finished with a brass-plated nickel casing. Its form factor is that of a cylindrical glass body with two metal caps—one on each end. The maximum interrupt current of this fuse is 10,000 amperes. It features Inrush Current Limiting and Built-in Surge Protection. The FSF-2A is designed for use in high-voltage, high-current applications, such as power supplies, telecommunications, industrial equipment, and other machinery. The FSF-2A meets UL, CSA, and CE requirements.