Littelfuse, Inc., founded in 1927 and headquartered in Chicago, Illinois, USA, is a global leader in circuit protection, power control, and sensing technologies. The company serves virtually every market that uses electrical energy, including automotive, industrial equipment, consumer electronics, and commercial vehicles. Its core product portfolio features the industry’s broadest and deepest range of circuit protection devices, such as automotive blade fuses (ATO, Mini, Maxi series), resettable polymeric positive temperature coefficient (PPTC) devices (PolySwitch series), metal oxide varistors (MOVs), transient voltage suppression (TVS) diodes (SPA and SMBJ families), and electrostatic discharge (ESD) protection arrays. Littelfuse also offers a growing lineup of power semiconductors including silicon carbide (SiC) MOSFETs, rectifiers, and gate drivers, alongside electromechanical sensors like reed switches and Hall effect speed sensors for automotive applications. The company has expanded into heavy-duty switches for commercial vehicles, power distribution centers for mining, and generator control and protection equipment for marine applications. With decades of proven technical expertise and sustained R&D investment, Littelfuse holds a top-tier position in the global circuit protection market, recognized for its reliability and innovation. Its products are critical to ensuring safety and performance in demanding environments, from high-voltage industrial systems to miniature consumer gadgets. Littelfuse operates manufacturing, sales, and engineering facilities worldwide, supporting a diverse customer base with localized solutions. The company is publicly traded on the NASDAQ under the symbol LFUS and continues to strengthen its position through strategic acquisitions and portfolio expansion.