Vishay was founded in 1962 by Dr. Felix Zandman with funds raised from his cousin, Alfred P. Slaner, and was named after Dr. Zandman's ancestral village in Lithuania in honor of the family members who died in the war. The company's initial products included foil resistors and foil resistance strain gages.

By 1985, the company had grown to become a leading global manufacturer of these products and began a series of strategic acquisitions to become a manufacturer of electronic components with a wide range of products. Today, Vishay produces one of the world's largest portfolios of discrete semiconductors and passive electronic components that are critical to innovative designs in the automotive, industrial, computing, consumer electronics, telecommunications, military, aerospace and medical markets.

Major product lines: capacitors, resistors, inductors, diodes, transistors, transformers, MOS, power supply chips.

TVS (TRANSIENT VOLTAGE SUPPRESSOR) or transient voltage suppression diode is a new product developed on the basis of the voltage regulator process, its circuit symbols and ordinary voltage regulator diodes are the same, the shape is also no different from ordinary diodes, when the ends of the TVS tube is subjected to instantaneous high-energy shocks, it can be a very high speed (up to 1 * 10^-12 When the TVS tube is subjected to an instantaneous high-energy shock, it can suddenly reduce its impedance at a very high speed (up to 1*10^-12 seconds), while absorbing a large current and clamping the voltage between its two ends at a predetermined value, thus ensuring that the circuit components behind it are protected from transient high-energy shocks and damage. TVS reaction speed than the RC circuit faster than 10E-12s, can not take into account the TVS breakdown voltage VBR, reverse critical voltage VWM, the maximum peak pulse current IPP and the maximum clamping voltage VC and the peak pulse power PP. Select the VWM is equal to or greater than the circuit operating voltage, VC is less than the protection of the device's withstand voltage value, can be measured the best (IPP), or to estimate the power of the pulse. Select a TVS with higher power.

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