Littelfuse ATO20BP 20 Amp ATO Blade Fuse (Pack of 5)

Littelfuse

<h3>About Littelfuse: A Century of Circuit Protection Innovation</h3><p><strong>Littelfuse</strong> has been engineering circuit protection solutions since 1927, when founder Edward V. Sundt developed the company's first small protective fuse in Chicago, Illinois. Nearly a century later, <a href="/1650-littelfuse">Littelfuse</a> has grown into a global leader whose products are trusted across automotive and commercial vehicles, industrial machinery, telecommunications, medical devices, and consumer electronics.</p><p>One of the brand's most consequential milestones came in 1976, when Littelfuse invented the AutoFuse — the world's first blade-type automotive fuse. That compact, reliable design became the industry standard and remains the foundation of modern vehicle electrical systems to this day. It's a testament to the engineering-first culture that has driven the company for nearly 100 years.</p><h3>Automotive Expertise Across Every Circuit</h3><p>In the automotive world, Littelfuse is perhaps best known for its extensive lineup of <a href="/1650-littelfuse-fuse-2676">fuses</a>. The portfolio spans blade fuses, cartridge fuses, high-current bolt-down fuses, and high-voltage fuses for EV and hybrid applications, covering both OEM fitment and aftermarket replacement needs. Whether you're replacing a blown fuse or upgrading the electrical system on a truck or SUV, Littelfuse offers solutions engineered to match or exceed original equipment performance.</p><p>Beyond individual fuses, the brand makes it easy to keep a full supply on hand with convenient <a href="/1650-littelfuse-fuse-kit-10140">fuse kits</a> that cover the most common amperage ratings — a practical choice for any glove box or garage toolbox. And for those building out custom electrical systems or consolidating power distribution, Littelfuse <a href="/1650-littelfuse-fuse-blocks-202018">fuse blocks</a> provide a clean, organized solution that accepts a wide range of fuse types and relay configurations.</p><p>Rounding out the brand's electrical control offerings is its robust selection of <a href="/1650-littelfuse-fuses-200461">fuses</a> for both light-duty and heavy-duty applications, as well as a full line of <a href="/1650-littelfuse-starter-motor-control-relay-3812">starter motor control relays</a>. Littelfuse solenoid relays act as on-off switches for starters, motors, lights, and accessory systems in commercial vehicles, with both intermittent-duty and continuous-duty models available to match the demands of the application.</p><h3>Why Technicians and Enthusiasts Trust Littelfuse</h3><ul><li><strong>Pioneer of the blade fuse:</strong> Littelfuse invented the AutoFuse format that every modern vehicle relies on.</li><li><strong>OEM and aftermarket coverage:</strong> Products are designed to fit and function as direct replacements in a vast range of makes and models.</li><li><strong>Broad product depth:</strong> From micro blade fuses to high-voltage EV fuses and heavy-duty starter relays, the catalog covers virtually every automotive electrical need.</li><li><strong>Proven reliability:</strong> Used by OEM manufacturers and relied upon by professional technicians worldwide.</li><li><strong>Innovation across industries:</strong> Engineering expertise developed across automotive, industrial, and electronics markets translates into components built to demanding standards.</li></ul><p>Whether you're a DIY enthusiast troubleshooting an electrical fault or a fleet manager sourcing commercial vehicle components, Littelfuse delivers the depth, quality, and reliability your electrical systems demand.</p>