Mersen A4J30 600V 30A Class J Fuse, UL Power Fuse, Class J, Fast Acting Characteristics, 600 Vac/300 Vdc, 30 Ampere, Interrupting Rating 200 Kiloampere (Ac), 20 Kiloampere (Dc), Ferrule Terminal, Diameter 13/16 Inch, Length 2-1/4 Inch, Approval Ul 198L, Ul 248-8, Csa C22.2, Amp-Trap[R] Brand, A4J Model