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New Surface Mount and Axial Lead Products Offer Complete
Silicon Avalanche Diode Solution in RoHS Compliant Packaging

DES PLAINES, Illinois, January 17, 2005 – Littelfuse, Inc. (NASDAQ/NMS:LFUS) today announced the expansion of its TVS Diode product lines to include the new 400 Watt and 1500 Watt products. The new 400W parts are available in both an axial leaded package P4KE, (DO-41) and surface mount package SMA, (DO-214AC). A new 1500W version in a surface mount package SMC, (DO-214AB) is also available.

TVS Diodes are specifically designed to protect electronic equipment from high voltage/high energy transients. They have excellent voltage clamping levels and are ideally suited for many applications including computer equipment, control modules, automotive system and industrial products.

The new product lines include the P4KE Series 400W axial leaded product, the SMAJ Series and P4SMA Series 400W surface mount products, and the SMCJ Series and 1.5SMC Series 1500W surface mount products. All series are available in voltage ranges from 5.0 to 550 volts. Consistent with the Littelfuse’s existing TVS Diodes product offering, all of these new products are both RoHS compliant and are recognized under the Components Program of Underwriters Laboratories.

Products are available for ordering now. Full electrical parameters and performance characteristics along with related Application Notes are available via datasheets at www.Littelfuse.com. Customers can obtain more information or receive samples by contacting a Littelfuse Applications Engineer at 1-800-999-9445 (phone), or 847-391-0459 (FAX) or contact your local Littelfuse sales representative or distributor.


About Littelfuse
Littelfuse is a global company offering the broadest line of circuit protection solutions in the industry supporting applications across a wide range of market segments, including automotive, computer, handheld devices, digital game and consumer electronics, as well as industrial and wired telecom equipment. In addition to its Des Plaines world headquarters, Littelfuse has manufacturing facilities in England, Ireland, Switzerland, Mexico, China and the Philippines, Irving, Texas as well as in Centralia, Des Plaines and Arcola, Illinois. It also has sales, engineering and distribution facilities in Germany, the Netherlands, Singapore, Hong Kong, Korea, Taiwan, Japan and Brazil.

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

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Any forward looking statements contained herein involve risks and uncertainties, including, but not limited to, product demand and market acceptance risks, the effect of economic conditions, the impact of competitive products and pricing, product development and patent protection, commercialization and technological difficulties, capacity and supply constraints or difficulties, exchange rate fluctuations, actual purchases under agreements, the effect of the company’s accounting policies, labor disputes, restructuring costs in excess of expectations and other risks which may be detailed in the company’s Securities and Exchange Commission filings.