0000889331 2026-05-14 2026-05-14 false LITTELFUSE INC /DE 0000889331 NASDAQ 8-K 2026-05-14 DE 0-20388 36-3795742 6133 N. River Rd. Suite 500 Rosemont IL 60018 773 628-1000 false false false false Common Stock, par value $0.01 per share LFUS false