While circuit breakers are becoming more prominent in 12-volt system design, the fuse remains a common, and useful, technology. If you're not up on your fuses, here's an overview of where they fit into automotive circuit protection.
ATO blade fuses have been an original equipment circuit protection standard in the automotive, truck industry for many years. Recently, Littelfuse upgraded their ATO fuses being made from polycarbonate, polyethersulfone, polysulfone to ATOF fuses made with nylon material. The change in material improves the durability of the fuse and ease of use for original equipment manufacturers and maintenance professionals.