Bussmann JKS-30 Fast Acting Fuse Brand: Bussmann. Part Number: JKS-30. Bussmann Limitron Fuse, Current Limiting Fast Acting, Series: JKS, Indicating/Non-Indicating: Non-Indicating, Rejection/Non-Rejection: Non-Rejection, 30 A, 600 V, 200 kAIC Interrupt, Class: J, Ferrule End Terminal, Holder Mount, Cylindrical Body Type, Single Element, Melamine, 0.81 in Dia x 2.25 in L Body Size. Additional Description: BUSS-JKS-30 (N) LIMITRON FAST ACTING FUSE CLASS J. Catalog Description: Eaton Bussmann Series Class J fuse, JKS, fast-acting, current limiting fuse, 30 A, rejection style fuse, interrupting rating of 200kA at 600Vac..