Littelfuse, Inc., founded in 1927 and headquartered in Chicago, Illinois, is a leading global provider of technologies that protect, control, and sense electrical energy. The company serves a broad customer base across automotive, industrial, data centre, consumer electronics, and telecom markets, delivering products that improve safety, reliability, and energy efficiency in modern electronic systems.

Best known for its pioneering work in circuit protection, Littelfuse has expanded its portfolio through both internal development and acquisitions to include a wide range of complementary technologies. Today, its offerings cover fuses, resettable protection devices, TVS diodes, and surge protection components, alongside power semiconductors, relays, sensors, and magnetic solutions. This diversity enables the company to address entire application needs, from overcurrent and overvoltage protection to power distribution and sensing.

Automotive is one of Littelfuse’s largest markets. Its products support electric vehicles, advanced driver-assistance systems, infotainment, and battery management, with technologies that ensure safety and system resilience. In the industrial sector, Littelfuse provides components for energy, automation, HVAC, and lighting, while in electronics it is a key supplier of protection and control solutions for consumer devices and computing equipment.

The company is also known for its strong focus on engineering support. Littelfuse provides extensive technical resources, including design guides, simulation tools, and reference designs, to help engineers integrate protection and control solutions effectively. Its global footprint includes manufacturing, R&D, and distribution facilities across North America, Europe, and Asia, ensuring responsiveness to local markets.

With a long history of innovation, strategic acquisitions, and customer-focused engineering, Littelfuse has positioned itself as a trusted partner for companies looking to make their systems safer, more efficient, and more reliable. Its solutions are found everywhere from vehicles and factories to consumer electronics, reflecting the company’s mission to enable a sustainable, connected, and electrified world.