Littelfuse Fuses

Littelfuse Fuses: Industry-Leading Overcurrent Protection

When it comes to protecting your vehicle's electrical circuits, few names carry as much authority as Littelfuse. Littelfuse invented automotive fuses and perfected resettable PPTC devices, giving them a foundational role in the history of automotive circuit protection. Today, that legacy translates into a lineup of fuses trusted by OEM engineers and DIY mechanics alike. Browse the full selection of Fuses to find the right fit for your application.

A Comprehensive Fuse Portfolio

Littelfuse offers the industry's most extensive selection of automotive fuses, providing reliable protection against overcurrent, short circuits, and overtemperature conditions. Their portfolio includes OEM and aftermarket solutions such as blade fuses, cable fuses, cartridge fuses, surface-mount fuses, high-current fuses, and high-voltage fuses. Whether you're doing a routine fuse swap or upgrading a high-current electrical system, there's a Littelfuse product engineered for the task.

Iconic Blade Fuse Product Lines

Littelfuse's blade fuse lineup is built around several well-established series. Automakers around the world consider 32 V ATO fuses standard equipment for protecting low-voltage circuits. The ATO/ATOF® series features fast-acting performance with ampere ratings from 1 A to 40 A, see-through housings that make it easier to spot a blown fuse, and color-coding to indicate the ampere rating.

For heavier-duty needs, the MAXI® series steps up. MAXI® fuses employ diffusion pill technology, allowing them to deliver predictable time-delayed SLO-BLO® performance and low heat dissipation, and they often replace fusible wires or fusible links that protect high-current segments of the wiring harness. On the compact end of the spectrum, MINI® 32V automotive blade fuses boast a miniature design that allows automakers to pack more circuit protection into less space, yet they perform reliably in adverse environments and at extreme temperatures.

OEM and aftermarket automotive blade fuses are available in the MINI, MAXI, MAXI+, MICRO2, MICRO3, and LP MINI product lines for overcurrent and short circuit protection.

Specialty Technologies: SLO-BLO® and Inline Cable Fuses

Beyond standard blade fuses, Littelfuse brings patented innovation to inline applications. Cable and inline fuses provide overcurrent protection along wiring harnesses in passenger and commercial vehicles, and the CablePRO® and BF Inline fuses employ Littelfuse's patented SLO-BLO® technology to ensure reliable time-delayed performance. For cartridge-style protection, MCASE+® and JCASE® cartridge fuses provide time-delayed overcurrent protection to circuits in commercial and passenger vehicles.

OEM Quality in Aftermarket Form

Littelfuse offers a wide range of car fuse replacement options and high-quality automotive aftermarket products designed to match OEM performance standards, including replacement blade, bolt-down, and cartridge fuses under trusted names like ATO/ATOF®, MAXI®, MEGA®, MIDI®, and MINI®. For technicians who want a quick visual alert, Littelfuse also offers indicator fuses equipped with LEDs that switch on when their elements burn out, exactly matching the performance and specifications of the standard ATO, MAXI, and MINI fuses.

Whether you're maintaining a daily driver, a commercial fleet vehicle, or a classic car, Littelfuse fuses deliver the protection your electrical system demands — engineered by the company that started it all.