Logo
  • Resources
    • COTS for Space WEBINARS
    • ACCEDE 2022 Workshop on COTS
    • EEE COMPONENTS
    • SPECIFICATIONS / QPLs
    • EVENTS / WEBINARS
    • SPACE TALKS
    • TECH ARTICLES
    • MANUFACTURERS NOTIFICATIONS
  • Laboratory Services
    • LABORATORY STANDARD TESTING
    • NON STANDARD TESTING
    • SILICON CARBIDE -SiC- DIODES
    • CROWDTESTING
    • OPTOELECTRONICS
    • SMALL SATS
    • REPRESENTATIVE PROJECTS / PAPERS
  • Additional Services
    • INDUSTRY 4.0 CYBERSECURITY (IEC 62443)
    • PENETRATION TEST
    • CYBERSECURITY CERTIFIED (CSC)
    • CODE SCORE MATRIX
    • LONG-TERM STORAGE OF WAFERS
    • ELECTRONIC DESIGN
  • Tools
    • COMPARATOR
    • MY DCLs/BOMs
    • STOCKPLACE
  • About Us
  • My Request
  • Sign In
  • Resources
    • COTS for Space WEBINARS
    • ACCEDE 2022 Workshop on COTS
    • EEE COMPONENTS
    • SPECIFICATIONS / QPLs
    • EVENTS / WEBINARS
    • SPACE TALKS
    • TECH ARTICLES
    • MANUFACTURERS NOTIFICATIONS
  • Laboratory Services
    • LABORATORY STANDARD TESTING
    • NON STANDARD TESTING
    • SILICON CARBIDE -SiC- DIODES
    • CROWDTESTING
    • OPTOELECTRONICS
    • SMALL SATS
    • REPRESENTATIVE PROJECTS / PAPERS
  • Additional Services
    • INDUSTRY 4.0 CYBERSECURITY (IEC 62443)
    • PENETRATION TEST
    • CYBERSECURITY CERTIFIED (CSC)
    • CODE SCORE MATRIX
    • LONG-TERM STORAGE OF WAFERS
    • ELECTRONIC DESIGN
  • Tools
    • COMPARATOR
    • MY DCLs/BOMs
    • STOCKPLACE
  • About Us
  • My Request
  • Sign In
Blog Image
ACTIVES, EEE Components, PASSIVES

Optimal Applications for Chip Varistors for ESD

  • Posted by doEEEt Media Group
  • On November 18, 2020
  • 3

Characteristics of chip varistors

Chip varistors have both surge absorption capabilities and noise suppressing effects.

The following figure shows the equivalent circuit of a chip varistor. The chip varistor is equal to the one where the capacitor is connected parallelly to the two Zener diode elements that are connected opposite to each other.

The equivalent circuit of a chip varistor

Figure 1: The equivalent circuit of a chip varistor

Equivalent to the circuit where the two Zener diode elements are connected opposite to each other and the capacitor is connected parallelly. The current-voltage characteristics are symmetric and have no polarity.

Figure 2: A comparison between the noise level and frequency characteristic example

Chip varistors achieve both noise suppression and ESD suppression.

Optimal applications for chip varistors

The following figure shows the application field of the various components for ESD countermeasures. This article introduces excellent applications especially for chip varistors.

The optimal applications for chip varistors are in the blue region.

Figure 3: The optimal applications for components for ESD countermeasures

Get a quick price/delivery estimation of your components, being the first in front of your customer

Click over the components to navigate in our databse in Capacitors and Discretes⇒ 

Niobium

CAPACITORS

DISCRETES

Optimal applications for multilayer chip varistors

Audio circuits (Headphone, Mic, Speaker)

TVS diodes are sources of noise in audio lines, and increasing output to raise volume degrades sound quality. Chip varistors are the optimal solution in audio lines.

Solution Guide “Audio line solutions for smartphones using chip varistors”

Figure 5: Range of multilayer chip varistors suitable for audio circuits (headphones, mics, speakers)

Figure 4: Result of THD+N measurement for each ESD protection component

Countermeasures against counter electromotive force (Solenoid valve, Motor, etc.)

TDK’s chip varistors feature excellent resistance to repeated surges, and products with characteristics that compare well with zener diodes are also available as automotive grade AVR series.

Application Note “Chip Varistors that Excel in Resisting Repeated Surges”

Figure 6: Effects on varistor voltage due to repeated applications of surges

Figure 7: Range of multilayer chip varistors suitable for countermeasures against counter electromotive force (solenoid valves, motors, etc.)

Comparison between chip varistors and MLCCs as ESD protection

When the capacitance of the protection components is in the 100pF range, the ESD protection capacity of chip varistors becomes extremely high compared to multilayer chip capacitors.

Application Note “Comparison between chip varistors and MLCCs as ESD protection”

Figure 8: The ESD absorption waveforms of a multilayer ceramic chip capacitor and a multilayer chip varistor with the same capacitance

Figure 9: Applications where the capacitance of components for ESD countermeasures is about 100pF

Recommended chip varistors by application

Selection Guide

The chip varistors in the table below for the applications other than those shown above are recommended products. The optimal products for applications according to size and circuit voltage can be selected from the table below. All products have shown good performance with each application.

  • ESD Protection Devices Selection Guide (Commercial Grade)
  • ESD Protection Devices Selection Guide (Automotive Grade)

source: TDK TechNote
TDK has released today a technical article on The Optimal Applications for Chip Varistors for ESD Countermeasures.

  • Author
  • Recent Posts
doEEEt Media Group
doEEEt Media Group
doEEEt media is the group behind every post on this blog.
A team of experts that brings you the latest and most important news about the EEE Part and Space market.
doEEEt Media Group
Latest posts by doEEEt Media Group (see all)
  • Miniature RF Connectors - April 29, 2025
  • Miniature RF Connectors for high-performance testing - April 24, 2025
  • Space-Grade components available for immediate delivery - April 10, 2025
TAGS: Capacitors DC DC Switching Regulator EEE PARTS ESD Linear Regulator TDK VARISTOR Zener

Previous Post

High Vibration Acceleration-Resistant Coil

Next Post

Panasonic Releases Low Profile 6A Relay
3 comments on Optimal Applications for Chip Varistors for ESD
nexa electrical supplies
  • Feb 17 2020
thanks for sharing useful information on Optimal Applications For Chip Varistors For ESD
    Elena Vallejo
    • Feb 17 2020
    Thank you for reading to us. We will continue to share information on many more topics.
      Elena Vallejo
      • Feb 17 2020
      Thank you for reading to us. We will continue to share information on many more topics.
Recent Posts
  • Miniature RF Connectors
  • Miniature RF Connectors for high-performance testing
  • Space-Grade components available for immediate delivery
  • Introduction to RD ALFA Microelectronics: Components and Capabilities
  • Managing EEE components for LEO and lower cost space missions
Scroll

doEEEt.com

DoEEEt: Electrical Electronic Electromechanical (EEE) parts database. Find (EEE) components/parts products and datasheets from hundreds of manufacturers.

Privacy Policy and Legal Notice

Copyright

Cookie Policy

Copyright © 2021 ALTER TECHNOLOGY TÜV NORD S.A.U

Company

About us

Contact us

How does doEEEt works? – FAQ

ALTER Laboratory Services

Microwave and RF Testing

Small Sats Testing

COTS components Testing

Authenticity Test