LITTELFUSE RANKS #81 ON THE 2009 INFORMATIONWEEK 500

CHICAGO, September 23, 2009 – Littelfuse, Inc. (NASDAQ:LFUS) today announced the company has been ranked #81 on the 2009 InformationWeek 500 annual listing, which recognizes the nation’s 500 most innovative users of business and information technology. Littelfuse jumped to the 81st position from its 2008 ranking of #156, surpassing some of the largest and most well-known U.S. companies.

Littelfuse’s information technology team was recognized for its noteworthy support of the organization’s lean initiatives, as well as its efforts to reduce complexity, while simultaneously improving capabilities and remaining cost neutral.

“This award is an affirmation of our global team’s hard work and Littelfuse’s continued commitment towards delivering technology solutions for the circuit-protection industry,” said Ed Earl, Chief Information Officer. “It is a pleasure and an honor to be in the top 100,” added Earl.

Selection for the InformationWeek 500 is a rigorous process that includes quantitative and qualitative assessments of business technology innovation. Companies must have revenues of $250 million or more and must complete a rigorous application on their technology strategies. More information on the annual listing program can be found online at www.informationweek.com/iw500.

As the worldwide leader in circuit protection products and solutions with annual sales of $530.9 million in 2008, the Littelfuse portfolio is backed by industry-leading technical support, design and manufacturing expertise. Littelfuse products are vital components in virtually every product that uses electrical energy, including automobiles, computers, consumer electronics, handheld devices, industrial equipment and telecom/datacom circuits. Littelfuse offers Teccor®, Wickmann® and Pudenz® brand circuit protection products. In addition to its Chicago, Illinois, world headquarters, Littelfuse has sales, distribution, manufacturing and engineering facilities in Brazil, Canada, China, England, Germany, Hong Kong, India, Japan, Korea, Mexico, the Netherlands, the Philippines, Singapore, Taiwan and the U.S.

For more information, please visit Littelfuse’s Web site at www.littelfuse.com.