SANTA CLARA, CALIFORNIA — February 25, 2004 — Siliconix incorporated (NASDAQ: SILI), an 80.4%-owned subsidiary of Vishay Intertechnology, Inc. (NYSE: VSH), today announced a new family of TrenchFET® power MOSFETs in a reverse-lead TO-252 DPAK package.

The reverse-formed leads of the "SUR"-packaged TrenchFETs allow the device to be mounted inversely on the PCB with a heat sink on top, enabling cooler operation. Because heat generated from power can be dissipated to the air rather than to the PCB, each of these power MOSFETs features a lower effective on-resistance value and higher current capability than DPAK power MOSFETs with conventional lead-outs. Cooler operation also takes thermal stress off the board, contributing to better overall reliability.

Used for desktop computer core dc-to-dc conversion applications, the SUR power MOSFETs enable the design of "greener" VRM modules and PC motherboards that use power more efficiently and require fewer components.

The 20-V SUR70N02-04P and 30 V SUR50N03-06P, SUR50N03-09P, SUR50N03-12P, and SUR50N03-16P power MOSFETs offer a range of on-resistance values from 4 mΩ to 16 mΩ and can serve as both synchronous and control FETs in dc-to-dc converters.

SUR TrenchFET Power MOSFET Family: Summary Table

Device	rDS(on) (Ω at 10 V)	Qg (nC at 4.5 V)	rDS(on) x Qg	QGS (nC)	QGD (nC)
SUR70N02-04P	0.0037	34	125.8	11	10
SUR50N03-06P	0.0065	21	136.5	10	7.5
SUR50N03-09P	0.0095	11	104.5	7.5	5.0
SUR50N03-12P	0.012	13	156.0	6.0	5.0
SUR50N03-16P	0.016	8.5	136.0	5.0	2.5

Samples and production quantities of SUR family reverse-lead TrenchFET power MOSFETs are available now, with lead times of 10 to 12 weeks for larger orders.

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, MOSFETs, and infrared optoelectronics) and passive electronic components (resistors, inductors, and capacitors). These components are used in virtually all types of electronic devices and equipment, in the industrial, computing, automotive, consumer, telecommunications, military, aerospace, power supplies, and medical markets. Vishay's product innovations, successful acquisition strategy, and "one-stop shop" service have made it a global industry leader. Vishay can be found on the Internet at http://www.vishay.com.

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TrenchFET is a registered trademark of Siliconix incorporated.