Bussmann fwp 690v700v 20 100a 58mm high speed fuses with striker bussmann fwp 40a22fi this high speed fuse from bussmann is a ferrule style fuse with indicating striker designed with excellent cycling capability and dc performance the fuse also offers low arc voltage and low energy let through i2t plus low watts loss in a compact size bussmann fwp 40a22fi 690v700v 40a high speed fuse