This 32 A/415 V porcelain Kit-Kat fuse unit is designed for industrial or large commercial electrical installations where a robust fuse device is required. The porcelain body provides excellent insulation, heat resistance and mechanical durability. The conductive parts (typically brass or copper) allow for strong electrical connection, and the rating means it can interrupt circuits up to 32 amps at ~415 volts AC (commonly a three-phase supply voltage in many countries).