Eaton's Bussmann business has developed a new line of modular ferrule fuse block products for Class CC and supplemental fuse applications. The new fuse blocks are fully modular with a snap together design for tool-less assembly of multiple-pole blocks at point-of-use while reducing inventory and assembly time. Each block has provisions for DIN rail or panel mounting that permit the same block to be used for multiple applications. The new blocks also feature optional covers that enhance electrical safety with IP20 finger safe ratings for the full wire size range of each block. Safety is further improved with an enhanced lockout/tagout feature, compatible with a broad array of lock designs. Covers are available with open circuit indication to speed troubleshooting and have provisions for an optional snap-in marker label for easy circuit identification.