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This document guides the reader about the typical steps involved with selecting a Littelfuse varistor to serve most applications. an9771 Selecting a Littelfuse Varistor. Application Note. July 1999. AN9771.1. Introduction. The varistor must operate under both a continuous operating. VM(DC...

...dissipation ratings of the selected varistor type. Where suitable equipment is available, these ratings may be verified. an9773 Varistor Testing. Application Note. January 1998. AN9773. Introduction. Field Maintenance. This note details the common tests of varistor parameters and. Field maintenance...

APPLICATION. NOTES. Littelfuse. Varistor Design Examples. This note is meant to be a guide for the. so some suppression must be added. It is. 3000. UL1449 CORD CONNECTED. user in selecting a varistor by describing. desirable to use the built-in impedance of. AND DIRECT PLUG-IN. 2000. CATEGORY. common...

...to be integrated. frequency transformers, they are frequency (typically up to 1 MHz) An overvoltage component, usually. more efficient and offer smaller enables the use of small, highly a metal-oxide varistor and an. footprints. This high efficiency efficient transformers. Lastly, the overcurrent...

...conditions such as. transient voltage type, magnitude and frequency are required to identify. matching ratings of the Varistor. Visit www.littelfuse.com/varistors.html for. technical application articles and reference. designs serving a wide range of applications....

...characteristics. These boundaries are responsible for blocking conduction at low voltages and are the source of the nonlinear electrical conduction at higher voltages. an9767. Littelfuse Varistors - Basic Properties,. Terminology and Theory. Application Note. July 1999. AN9767.1. What Is A Littelfuse Varistor...

Voltage. Peak voltage across the varistor measured under conditions of a specified peak VC pulse current and specified. VC. waveform. NOTE: Peak voltage and peak currents are not necessarily coincidental in time. Rated Peak Single Pulse Transient Currents (Varistor). Maximum peak current which...

Most commonly selected components. devices such as Transzorbs or Zener diodes; this solution. for this purpose are «Metal Oxyde Varistor» (MOV), which. guarantees that the MOV will provide the high energy. offers the unique feature of being very good conductors. handling capability while the avalanche...

Most commonly selected components. devices such as Transzorbs or Zener diodes; this solution. for this purpose are «Metal Oxyde Varistor» (MOV), which. guarantees that the MOV will provide the high energy. offers the unique feature of being very good conductors. handling capability while the avalanche...

...the operating characteristics can be estimated as follows: battery. Several Times. <75V. Assume VC = 40V, then IP = (80 -40V)/R1 = 40A. disconnected. in Vehicle Life. The energy W dissipated in the varistor may be estimated. 1ms. Mutual coupling. <1J. Often. by: W = 1.4V. in harness. CIPτ (see AN9771 on Energy...

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