These fuses are found in the electrical Fuse Boxes in Cinder Hills Coal Mine. To get out of Pleasant Valley, they need to be removed and replaced with intact Replacement Fuses to power up the elevator. They always have a Condition of around 20-24% when taken out, and serve no other gameplay purpose than to be replaced.
While the model for this item can be found inside the Transmitters in Survival Mode, there's no way to actually obtain the item.