Littelfuse Announces Acquisition of Shock Block, Inc.

DES PLAINES, Illinois, March 3, 2008 – Littelfuse, Inc. (NASDAQ/NGS:LFUS) today announced that it has completed the acquisition of Shock Block, Inc, and its K-Tec branded line of ground-fault protection products. The company, which operates a facility in Dallas, Texas, is a leading supplier of specialty high-current ground-fault protection devices for use in a wide variety of industrial applications.

"Shock Block's line of K-Tec branded ground-fault protection devices is an excellent fit for Littelfuse and provides a strong base for further expansion of our electrical business,” said Dal Ferbert, Vice President and General Manager of the Littelfuse POWR-Gard Electrical Business Unit. “The acquisition adds ground-fault protection relays and industrial ground-fault circuit interrupters to our product line and broadens our capabilities in helping industrial customers reduce electrical hazards.”

“We plan to invest in the continued growth of this operation as we add new customers and further expand our industrial safety services,” said Gordon Hunter, Chief Executive Officer of Littelfuse.

Terms of the transaction were not disclosed.

About Littelfuse Founded in 1927, Littelfuse, Inc., the worldwide leader in circuit protection, offers the industry’s broadest and deepest portfolio of circuit protection products and solutions. Littelfuse devices protect products in virtually every market that uses electrical energy, from consumer electronics to automobiles to industrial equipment. In addition to its Chicago, Illinois, world headquarters, Littelfuse has more than 20 sales, distribution, manufacturing and engineering facilities in the Americas, Europe and Asia. Technologies offered by Littelfuse include Fuses; Gas Discharge Tubes (GDTs); Positive Temperature Coefficient Devices (PTCs); Relays, Controls, and Systems; PulseGuard® ESD Suppressors; SIDACtor® Protection Thyristors; TVS Diode Arrays (SPA™ Family of Products); Switching Thyristors; TVS Diodes and Varistors. The company also offers a comprehensive line of highly reliable Electromechanical and Electronic Switch and Control Devices for commercial and specialty vehicles, as well as underground Power Distribution.

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