Vishay's New 250-V N-Channel TrenchFET® Power MOSFETs Offer Up to 50% Improved On-Resistance in SO-8 and D2PAK Footprints

SANTA CLARA, CALIFORNIA — January 28, 2004 — Siliconix incorporated (NASDAQ: SILI), an 80.4%-owned subsidiary of Vishay Intertechnology, Inc. (NYSE: VSH), today released a trio of 250-V n-channel TrenchFET® power MOSFETs that offer the lowest on-resistance available in the SO-8, PowerPAK® SO-8, and D2PAK packages for this voltage rating.

The Si4434DY (LITTLE FOOT® SO-8), Si7434DP (PowerPAK SO-8), and SUM45N25-58 (D²PAK) are designed to serve as primary switches in dc to dc converters, including forward converters and half-bridge converters, as well as in ac-to-dc converters and inverters, for telecom power supplies, distributed architectures, and miniature power modules.

The new devices offer greatly improved on-resistance values compared with competing devices of the same size. The Si4434DY and Si7434DP both feature a maximum on-resistance value of 155 mΩ at a 10-V gate drive and typical gate charge value of 34 nC. In the low-thermal-resistance D²PAK package, the SUM45N25-58 features on-resistance on 58 mΩ, a gate charge value of 95 nC, and a maximum junction temperature rating of 175 °C.

Samples and production quantities of the 250 V Si4434DY, Si7434DP, and SUM45N25-58 n-channel power MOSFETs are available now, with lead times of 10 to 12 weeks for larger orders.

Siliconix is a leading manufacturer of power MOSFETs, power ICs, analog switches, and multiplexers for computers, cell phones, fixed communications networks, automobiles, and other consumer and industrial electronic systems. With 2002 worldwide sales of $372.9 million, the Company's facilities include a Class 1 wafer fab dedicated to the manufacture of power products in Santa Clara, California, and an affiliated Class 1 wafer fab located in Itzehoe, Germany. The Company's products are also fabricated by subcontractors in Japan, Germany, China, and Taiwan. Assembly and test facilities include a company-owned facility in Taiwan, a joint venture in Shanghai, China, and subcontractors in the Philippines, China, Taiwan, Israel, and the United States.

Vishay Intertechnology, Inc., a Fortune 1,000 Company listed on the NYSE (VSH), is one of the world's largest manufacturers of discrete semiconductors (diodes, rectifiers, transistors, and optoelectronics and selected ICs) and passive electronic components (resistors, capacitors, inductors, sensors, and transducers). These components are used in virtually all types of electronic devices and equipment, in the industrial, computing, automotive, consumer, telecommunications, military, aerospace, and medical markets. Its product innovations, successful acquisition strategy, and ability to provide "one-stop shop" service have made Vishay a global industry leader. Vishay can be found on the Internet at http://www.vishay.com.

LITTLE FOOT, TrenchFET and PowerPAK are registered trademarks of Siliconix incorporated.