Edison's UL Class J fuse products are offered in both Dual-Element Time-Delay (JDL) and Fast-Acting (JFL) types. Both types have 200,000 amp interrupting rating at 600Vac RMS Sym amps. Their small physical size and high performance characteristics makes Class J fuses ideal for any space-limited applications. Edison's JFL fuses are best suited for the protection of non-inductive loads such as resistive heating and lighting circuits.