Fuse Holders

Littelfuse/Commercial Vehicle Products' comprehensive line of fuse blocks, holders, and accessories for automotive, electronic, and industrial applications enable easy fuse installation and replacement.

Every fuse requires a fuse holder for installation. That is because fuse holders perform two essential functions. The first is to mount the fuse or fuses in a convenient or easily accessible location, whether for integration in assembly or applications requiring frequent serviceability. The second job of a fuse holder is to shield the critical circuit protection elements in an application against environmental conditions, whether safeguarding against debris interfering with the connections or providing full waterproof and dust-tight protection.

Fuse holders are designed to work with specific fuses. However, application requirements dictate the type of fuse and fuse holder needed. Users must consider the application's electrical load requirements, number of circuits, and mounting location when selecting a fuse and fuse holder. Littelfuse offers a large portfolio of in-line and bolt-down fuse and fuse blocks for high-current and low-current applications as well as options that are waterproof or splashproof or come with an ignition protection rating.

In-line fuse holders offer a flexible, quick solution for placing fuses in cramped spaces or adding overflow or accessory circuits for low-current applications, such as electronics, panel displays, blower motors, air conditioners, and lighting. Littlefuse's portfolio includes in-line fuse holders for ATO®, MINI®, MAXI®, JCASE®, MIDI®, and glass fuses with various wire lead sizes, colors, and lengths to accommodate industry guidelines and applications with and without covers and with and without waterproof ratings.

For high-current applications, such as battery and alternator connections and starter fusing, requirements dictate using larger fuses like MEGA®, MIDI, and ZCASE®. Because of their larger size and placement requirements, these fuses typically need a bolt-down fuse holder or multi-fuse block to house and protect them from harsh conditions. For these applications, Littelfuse offers battery mount, stud mount, and bolt-down fuse holders with and without waterproof and ignition protection ratings. Littelfuse also offers fuse blocks and boxes for high-amperage fuses, such as MEGA and MIDI, and low-amperage fuses, such as ATO and MINI, designed for efficient multi-fuse installation and power distribution.

While the fuse is what users typically think of as providing circuit protection because it is the weak link that breaks when there is a circuit fault, the fuse holder is an essential part of circuit protection that helps prevent vehicle injuries and damage. Though fuse holders are designed to work with specific fuse types, it is important to look for the fuse holder's electrical ratings, such as maximum voltage and maximum current, to ensure it can support the intended fuse.