Polymer ESD Suppressors

Polymer ESD Suppressors

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 circuit.

Littelfuse plants for PolySwitch devices are ISO/TS 16949:2009 and ISO 9001:2008 certified.

PULSE-GUARD® ESD Suppressors

Littelfuse PulseGuard® ESD Suppressors offer extremely low capacitance which makes them ideal for use in high-speed data circuits (IEEE 1394, USB 2.0, HDMI, DVI, etc.). Available in single-line and multi-line packages, they provide ESD protection while ensuring that signal integrity is maintained.

When to Choose PULSE-GUARD® ESD Suppressors versus other ESD protection technologies:

  • The application tolerates very little added capacitance (high speed data lines or RF circuits)
  • ESD is the only transient threat
  • Protection is required on data, signal, and control lines (not power supply lines)

Additional information about ESD and suppression technologies.


XTREME-GUARD™ ESD Suppressors protect sensitive electronic equipment against extreme ESD conditions, in very small 0402 and 0603 footprints. This series product is specifically designed to suppress fast-rising ESD transients up to 30kV while adding virtually no capacitance to the circuit, which helps preserve signal integrity and minimize data loss. It is designed as RoHS compliant, halogen free, and Pb free.

Why choose XTREME-GUARD™ ESD Suppressors versus other ESD suppression technologies:

  • The XGD Series XTREME-GUARD™ ESD Suppressor protects sensitive electronics against electrostatic discharges as high as 30kV and is suitable for high voltage applications up to 32VDC
  • When correctly integrated into a circuit design, the XGD Series can safely absorb repetitive ESD strikes nearly four times the maximum level specified in the IEC61000-4-2 international standard without performance degradation
  • Even after multiple ESD strikes, it exhibits ultra-low current leakage (<1nA), ensuring minimal power losses, so it’s well-suited for protecting battery-powered electronics like wearables

Protecting Intelligent Outlets in Smart Homes

pdf icon ESD Suppression Design Guide

Littelfuse ESD suppression portfolio highlights the key selection parameters an engineer must address while designing-in ESD suppression products.

pdf icon Littelfuse Selecting an Appropriate ESD Device Application Note

Board designers today are confronted with a multitude of choices for ESD protection...

pdf icon Capacitance and Signal Integrity Application Note

This technical brief includes an introduction to capacitance to show that the capacitance characteristic is an important criterion when choosing an ESD suppressor. The effectiveness of ESD suppression technologies is not questioned here, rather it is noted that signal integrity can be compromised if capacitance is not taken into account...

pdf icon ESD Suppression Technologies Application Note

This technical brief discusses the three distinct Littelfuse product families that can be used for ESD suppression. These include the electroceramic MLV (MultiLayer Varistor), silicon (SP72x and SP050x) and polymer-based PulseGuard™ suppressor products...

pdf icon Protecting Electronic Devices Against ESD - Electronic Design

pdf icon Automotive Devices Quick Reference Application Guide


pdf icon Light Emitting Diode LED Lighting Applications Quick Reference Application Guide

pdf icon Circuit Protection Portfolio Quick Reference for Connectors and Protection Application Guide

pdf icon MSL Classification Product Brochure


pdf icon The Birth of a Safety Standard The IEC 62368_1 Technical Paper