ATC blade fuses are standard size and the most common type of fuse for automotive and marine applications but can be used in other electrical applications that require circuit protection. Common fuses for cars, trucks, boats, and RVs. Special blade fuses for automobile lighting, audio, UPS, auto headlights, taillights, stoplights, electronic circuit boards, or other electronic products with low-voltage circuits. ATC/ATO blade fuses (also called spade or plug-in fuse) comes with a high-temperature, impact-resistant plastic casing and two prongs that fit into the sockets that are mostly used in automobiles. Each fuse is a printer with the rated current amperage on the top of the fuse.