0000889331 2022-02-01 2022-02-01 0000889331 false LITTELFUSE INC /DE 8-K 2022-02-01 DE 0-20388 36-3795742 8755 W. Higgins Road Suite 500 Chicago IL 60631 773 628-1000 false false false false Common Stock, par value $0.01 per share LFUS NASDAQ false