Vishay’s New SMR1DZ and SMR3DZ Ultra-High-Precision Z-Foil Molded Surface-Mount Resistors Combine Typical TCR of ±0.05 ppm/°C, PCR of ±5 ppm at Rated Power, Tight Tolerance to ± 0.01 %, and Electrostatic Discharge (ESD) Rating Above 25,000 V

Devices Feature Load Life Stability of ±0.005 % With Flexible Terminations and Wide 5-Ω to 80-kΩ Resistance Range

MALVERN, Pa. — October 17, 2007 — Vishay Intertechnology, Inc. (NYSE: VSH) today announced the new SMR1DZ and SMR3DZ ultra-high-precision Z-Foil molded surface-mount resistors, which provide a low typical TCR of ±0.05 ppm/°C from 0 °C to +60 °C and ±0.2 ppm/°C from −55 °C to +125 °C, an excellent PCR (“ΔR due to self heating”) of ±5 ppm at rated power, tolerances to ±0.01 %, and a load life ratio stability of 0.005 %.

The new resistors are built on Vishay’s breakthrough “Z- foil” technology, which provides a significant reduction of the resistive component’s sensitivity to ambient temperature variations (TCR) and applied power changes (PCR). Z-Foil improves stability by an order of magnitude compared to any other resistor technology, allowing designers to guarantee a high degree of accuracy in fixed-resistor applications.

Featuring flexible terminations to ensure minimal stress transference from the PCB due to a difference in thermal coefficient of expansion (CTE), the devices offer a wide resistance range of 5 Ω to 80 kΩ, with any value at any tolerance available to designers for their specific application requirements.

Applications for the new devices include precision amplifiers; high-precision instrumentation; medical and automatic test equipment; high-end stereo equipment; electron beam scanning and recording equipment; and military, aerospace, and down-hole equipment and instrumentation.

The SMR1DZ features a power rating of 250 mW at 70 °C, while the SMR3DZ offers a power rating of 600 mW at 70 °C. Both devices have a load-life stability of ±0.005 % for 2000 hours at 70 °C; a low voltage coefficient of <0.1 PPM/°C; current noise less than -40 dB; and low thermal EMF of 0.05 µv/°C. They offer a fast rise time of 1.0 ns without ringing and feature a non-inductive (<0.08 µH), non-hot-spot design. The resistors offer the utmost in ESD immunity, withstanding electrostatic discharges exceeding 25 kV, for increased reliability.

Samples and production quantities of the new Z-Foil resistors are available now, with lead times of four to six 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, 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.

Bulk Metal is a registered trademark of Vishay Intertechnology, Inc.