Littelfuse TLS020 is a compact current-limiting telecommunications fuse designed to provide reliable overcurrent protection in low-voltage applications. This 20A cartridge fuse features a 170V voltage rating and delivers exceptional 100kA interrupting capacity at rated voltage for robust fault protection. The single-barrel construction measures 0.56 inches in diameter and weighs 5.19 lb, engineered for space-constrained telecommunications environments. Compliant with industry standards for telecommunications equipment protection, this fuse is specifically suited for safeguarding sensitive electronic circuits and telecommunications infrastructure where high-interrupting capacity and current-limiting characteristics are essential.