Littelfuse Announces Acquisition of SurgX Corporation

DES PLAINES, Illinois, February 3, 2006 – Littelfuse, Inc. (Nasdaq/NMS: LFUS) today announced that it has acquired SurgX Corporation, of San Jose, California, for $2.5 million in cash. SurgX Corporation licenses the SurgX™ brand of proprietary surge protection technology for over-voltage circuit protection. Littelfuse will incorporate the SurgX™ technology into its circuit protection product portfolio and will receive future royalties on SurgX’s existing license agreements.

The acquisition expands Littelfuse’s offerings for the electronic market with complementary polymer technology used in electrostatic discharge (ESD) protection devices. Littelfuse PulseGuard® polymer ESD devices are used in high-definition TVs, computers, cell phones and many other electronic applications that move large amounts of data at high speeds.

“The addition of the SurgX™ technology further solidifies our position as the market leader in polymer ESD circuit protection and will further enhance the value we bring to our customers,” said Gordon Hunter, Chief Executive Officer of Littelfuse.

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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