Littelfuse JLS Series Littelfuse JLS fuses provide space saving, fast-acting overload and short-circuit protection for vital industrial and power conversion applications. Superior performance in a space saving package. Other Names: JLS500, JLS 500 Amp, JLS-500, JLS 500A, JLS500A, JLS500.X Product specifications Ampere 500 A Voltage rating 600 VAC Interrupt rating 200 kA at 600 VAC Speed Fast Blow Class Class J Fuse Shape Cartridge Blade Fuses Approvals CE, CSA, QPL, UL Substitute parts Bussmann JKS, Mersen A4J Datasheet Littelfuse JLS Datasheet Dimensions 2.5" Dia x 3.752" L (63.5x95.3mm) Item weight 3.2 lbs Other names JLS500, JLS 500 Amp, JLS-500, JLS 500A, JLS500A, JLS500.X WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.