Esd Suppression Design Guide Page 2 ESD Suppression Design Guide

Electrostatic Discharge (ESD) is an electrical transient that poses a serious threat to electronic circuits. The most common cause is friction between two dissimilar materials, causing a buildup of electric charges on their surfaces. Typically, one of the surfaces is the human body, and it is not uncommon for this static charge to reach a potential as high as 15,000 volts. At 6,000 static volts, an ESD event will be painful to a person. Lower voltage discharges may go unnoticed, but can still cause catastrophic damage to electronic components and circuits. ABOUT THIS GUIDE Choosing the most appropriate suppressor technology requires a balance between equipment protection needs and operating requirements, taking into account the anticipated threat level. In addition to the electrical characteristics of suppression devices, the form factor/package style must also be considered. This guide is designed to summarize some of the comprehensive ESD solutions that Littelfuse offers, and help designers narrow to technologies appropriate to their end application: ESD Electrostatic Discharge (ESD) Suppression Design Guide Table of Contents Page ESD Suppression Technologies 2 ESD Damage, Suppression Requirements and Considerations 3 ESD Data Protocol, Application and Product Selection 4 Port Protection Examples 5-10 ESD Suppressor Product Selection Guide Polymer ESD Suppressors Multilayer Varistors (MLVs) TVS Diode Arrays ( SPA Diodes) 11-17 Legal Disclaimers 18 Specifications descriptions and illustrative material in this literature are as accurate as known at the time of publication, but are subject to changes without notice. Visit for more information. 2014 Littelfuse, Inc.

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