Fuse 125M09 Brush 80A BS88:Part 2 660V ac 80KA 400V dc 40KA Q1 This fuse is 125M09 model from BS88: Part 2 series. Its rated current is 80 amperes and its rated voltage is 660 volts alternating and 400 volts direct. Its breaking capacity is 80 kA for alternating current and 40 kA for direct current. This fuse is supplied as new.