Littelfuse Fuses, Relays & Circuit Protection

Littelfuse, founded in 1927 and headquartered in Chicago, is the world's #1 brand in circuit protection. Offering the industry's broadest portfolio—including fuses, relays, switches, TVS diodes, and power distribution products—Littelfuse protects electrical systems across automotive, industrial, and electronics markets. With more than 30 manufacturing and engineering facilities worldwide, Littelfuse delivers reliable, innovative solutions that safeguard vehicles, equipment, and infrastructure across virtually every market that uses electrical energy.