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Littelfuse Press Release - November 12, 2008

Littelfuse Logo

FOR IMMEDIATE RELEASE
Contact:

Dan Stanek
Director of Marketing & Corporate Marcom
Littelfuse, Inc.
Tel: 847-391-0714
dstanek@littelfuse.com

For High Resolution Image:
http://www.littelfuse.com/data/en/Product_Photos/Littelfuse_Fuse_477_HiRes.jpg

New Littelfuse 477 Series Offers Highest AC/DC Fuse Ratings in 5x20mm Size

The Littelfuse 477 Series is the first and only 5x20mm fuse with ampere ratings up to 16A at 400VDC that are also rated for 500VAC usage, making them well suited for protection of both high-energy/power-efficient DC applications and AC power supplies.

DES PLAINES, Illinois, November 12, 2008 - Littelfuse, Inc. (NASDAQ/NGS:LFUS) today announced its new 477 Series of 5x20mm ceramic-body, time-lag cartridge fuses designed for a wide range of industrial and consumer product applications.

These fuses will be of particular interest to OEMs because of their suitability for both primary and secondary protection, which simplifies sourcing and inventory management.

They are available in ampere ratings from 0.5A to 16A, with an interrupting capability of up to 1500A at 400VDC. The compact 5x20 package of the 477 Series, available in cartridge and axial lead configurations, also provides greater design and installation flexibility.

In comparison, for ampere ratings of 8A and above, the nearest competitor to the 477 Series has an AC voltage rating that is 20 percent lower, and yet a cartridge length that is 60 percent longer.

The 477 Series fuses are RoHS-compliant/lead-free, and are recognized under the component programs of the UL, CSA, and SEMKO agencies. They were designed for protection of equipment such as 3-phase power supplies, uninterruptable power systems (UPS), motor control circuits, air conditioning units, and other high-energy applications.

Electronic designers will appreciate the ability to use these fuses in power supply circuits both before and after the PFC (power factor correction) capacitor banks. The 477 Series DC rating also makes them ideal for individual component and secondary circuit protection. Their high interrupting capacity ensures that these fuses will open safely to protect the equipment under very high-current DC short-circuit conditions.

Availability.
OEM samples and production quantities are available now. For initial orders, lead times are approximately eight weeks ARO; for subsequent orders, six weeks ARO or less. For more information about Littelfuse and our circuit protection products, please visit the Littelfuse web site at www.littelfuse.com or contact the Littelfuse Technical Support line at 1-800-999-9445
Click here for 477 series fuse product specifications
For circuit protection application design ideas, please visit the new Application Design Center section of the Littelfuse web site.

If you have questions or require technical support please contact the Littelfuse technical support hotline at 1-800-999-9445.

About Littelfuse
As the worldwide leader in circuit protection products and solutions with annual sales of $536.1 million in 2007, 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 Des Plaines, Illinois, world headquarters, Littelfuse has sales, distribution, manufacturing and engineering facilities in Brazil, China, England, Germany, Hong Kong, India, Ireland, 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.

"Safe Harbor" Statement under the Private Securities Litigation Reform Act of 1995. 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, and other risks which may be detailed in the company's Securities and Exchange Commission filings.
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