DC (automotive) fuses are classified into two types: Blade and Bolt Down.
Blade - may be put by hand into a fuse holder. These fuses offer protection for a wide range of amperage values up to 70A. They are ideal for protecting little to medium diameter cables that are often located some distance from the battery. Because they are spliced into the cabling, single blade fuse holders are sometimes referred to as 'In-Line' fuse holders. Keep the fuse holder as close to the battery as possible and as far away from the load as possible. Littelfuse blade fuses are available in the following sizes: Micro 2, Micro 3, mini, LP mini, ATO, Maxi, mCase, mCase +, J Case, and LP JCase. Fuse holders are available for several of these fuses.
Bolt Down - requires a screw or nut/bolt to be fastened to the fuse holder. These fuses offer protection ranging from 30A to 500A. They are ideal for protecting medium to large diameter cables that are often located closer to the battery. Ring terminals are crimped onto wires that are spliced into the circuit and linked to these holders. Keep the fuse holder as close to the battery as possible and as far away from the load as possible. The following Littelfuse bolt-down fuses are available: MIDI, MEGA, CF8, and Z-Case. Fuse holders are available for several of these fuses. Furthermore, glass tube fuses are still used in a wide range of applications. These are typically lower current levels that are declining popularity in most automotive applications.
It glows when it blows! SmartGlow fuse technology makes it simple to detect an open circuit. It might be difficult to determine which fuse in an array has blown inside a fuse box. The SmartGlow is easily identified since it illuminates, signaling the need for replacement. MINI®, ATO®, and MAXI® blade fuses are available.
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