SMT Ceramic Fuse withstands temperatures up to 150°C.

Press Release Summary:

Operating in -55 to 150°C temperature range and quickly responding to over-currents without tripping, 437 Series surface-mount 1206-size ceramic fuse provides dc circuit protection in wide range of electronic applications. Available in current ratings from 250 mA to 8 A, it provides maximum fault current rating of 50 A and l2t nominal melting rating. RoHS compliant and UL and CSA approved unit is 100% lead- and halide-free.

Original Press Release:

Littelfuse Introduces 437 Series Surface-Mount Fuse with High Temperature Capability

The 437 Series is the only 1206-size fast-acting surface-mount fuse to provide reliable protection at working temperatures up to 150ºC

DES PLAINES, IL - July 10, 2008 - Littelfuse, Inc. (NASDAQ/NGS:LFUS), introduced the 437 Series surface-mount 1206-size fuse for reliable DC circuit protection in electronics applications with high ambient operating temperatures. Unlike comparable fuses, the 0437 Series operates effectively in temperatures ranging from -55ºC up to 150ºC without nuisance tripping. The 437 Series ceramic fuse has a temperature rating 20 percent higher than its closest competitor, and it has the ability to respond quickly to overcurrents without nuisance tripping caused by high inrush currents.

There is a growing need for protection in electronic applications in which high ambient operating temperatures are common. For example, LCD inverters, LCD TVs, LCD monitors, notebook computers, hard disk drives, XDSL modems, set-top boxes, and gaming consoles may experience temperature extremes. The 437 Series fuse provides a robust load rating up to 6.4A2s (8A current rating), which coupled with a high nominal melting rating (l2t), enables the 0437 to operate reliably over a wide temperature range, minimizing nuisance trips during momentary overload conditions.

The 437 Series includes UL and CSA agency approval and is available in current ratings from 250mA to 8A allowing this series of fuses to be used in a variety of applications. Each fuse has a maximum fault current rating (Interrupt Rating) of 50A and is 100 percent lead-free, halide-free, and compliant with RoHS requirements.

Littelfuse, the leader in fuse technology, provides a comprehensive range of products and solutions that provide over-current protection for any electronic application. With 80 years of experience in building and supplying over-current protection products, Littelfuse is dedicated to providing application expertise and support that meets customers' needs.


437 Series fuse samples are available now for order and sample request through authorized Littelfuse distributors worldwide. For a listing of Littelfuse distributors, please visit

For more information about Littelfuse and our circuit protection products, please visit the Littelfuse web site at or contact the Littelfuse Technical Support line 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 the Littelfuse web site at

Fiona Lui
Regional Marcom Manager
Asia Littelfuse HK Ltd.
Littelfuse, Inc.
Tel: +852-28105099

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