The JKS-30 is a 30A advanced protection class J current-limiting Fast-acting Fuse provides 10X better current limitation to help prevent equipment damage caused by short-circuit events. 200kA interrupting rating complies with NEC® Section 110.9 for today's large capacity systems. Fast-acting fuse helps prevent equipment damage caused by short-circuit events. Current limitation for non-inductive circuits provides Class J current-limiting response to maximum ground fault and short-circuit conditions.