Universal fuse engine with modular end fittings

Fuse assemblies, system and kits and methods for assembling fuses include a fuse body that may be universally and interchangeably used with a plurality of different end fittings providing various fuse configurations for connection to electrical circuits. The highly adaptable fuse construction allows fuses to be manufactured and assembled using a reduced number of parts that need to be stocked in order to manufacture a complete line of fuses, and further to more quickly provide replacement fuses to customers.