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This document guides the reader about the typical steps involved with selecting a Littelfuse varistor to serve most applications....

This note details the common tests of varistor parameters and describes suitable test methods using simplified test circuits. All tests are performed at 25 o C, unless otherwise specified. The test circuits and methods given herein are intended as a general guide. Since the tests frequently entail...

This note is meant to be a guide for the user in selecting a varistor by describing common application examples, and illustrating the solution process to determine the appropriate varisor. The note also describes series/parallel connection rules. It is desired to prevent failure of the power supply...

The CA and NA series of MOV varistor discs with silver electrodes are specifically designed for custom assembly and packaging. To take advantage of the excellent performance and reliability of Littelfuse varistor technology, it is important that the correct materials and processes be used when...

...with an additional function, that of transient protection. Built using Multilayer Varistor Planar Arrays, Transient Protection Filter Connectors are about to become an affordable commodity....

...they are forecast to comprise some 23% of the total component count. Another approach towards increases in circuit compression is that of multi-functionality. Varistors were single function products - their only purpose was to suppress transient voltages. Now, available in a multilayer construction...

Varistors are voltage dependent, nonlinear devices which have an electrical behavior similar to back-to-back zener diodes. The symmetrical, sharp breakdown characteristics shown in Figure 1 enable the varistor to provide excellent transient suppression performance. When exposed to high voltage...

...or minimum) for operation of a device. It is determined for specified values of environment and operation. The ratings indicate a level of stress which may be applied to the device without causing degradation or failure. Varistor symbols are defined on the linear V-I graph illustrated in Figure 1. At high...

Littelfuse offers three device technologies for the suppression of ESD events and other EMC-related transients. These are the MultiLayer Metal Oxide Varistor, silicon (SCR/Diode Array and TVS Avalanche Diode Arrays) and Polymeric Voltage Variable Material technologies. Though these products have...

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