Fuse, 500 A, 600V AC, 300V DC, Class RK1, LPS-RK-SPI Series, Indicating, Time Delay, Body Style Blade, Rejection, Interrupt Rating 100kA at 300V DC, 300kA at 600V AC, Fuse Size 13-3/8 in L x 2-7/8 in dia, Length 13 3/8 in, Diameter 2 7/8 in, Equivalent Brand and Series Bussmann LPS-RK-SPI, Littelfuse LLSRK-ID, Mersen A6D-R, Equivalent Series A6D-R, LLSRK-ID, LPS-RK-SPI, Compatible Fuse Block Series 1BR, R600, Body Material Melamine, Dual Element