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Technical Resources

• Application Notes

  	AN9108 - Littelfuse "ML" Multilayer Surface Mount Surge Suppressors  This application note focuses on the ML version multilayer suppressor. Littelfuse produces four families of multilayer suppressor, including the ML, MLE, MLN and AUML. Much of the information presented here is generic to all four. an9108.pdf (148 K)
  	AN9211 - Soldering Recommendations for Surface Mount and Multilayer Metal Oxide Varistors  This application note discusses recommendations for soldering surfacemount. MMOVcomponents. Surface mount technology has the advantages of lower costs, increased reliability and the reduction in the size and weight of components used. With these advantages, surface mount technology is fast becoming the norm in circuit design. an9211.pdf (96 K)
  	AN9311 - The ABCs of MOVs  The material in this application guide has been arranged in 3 parts for easy reference; Section A provides general guidelines on what types of MOV products are best suited for particular environments. Section B explains what Metal Oxide Varistors are and the basic function they perform. And section C helps clarify important information about MOVs for the design engineer, and answers questions that are asked most often. an9311.pdf (67 K)
  	AN9671 - The ABCs of Littelfuse Multilayer Suppressors  This application guide is similar to The ABCs of MOVs', offering specific information on Multilayer suppressor device technology and is intended to be a supplement to the Littelfuse Multilayer data sheets. Applications are covered, giving general examples of where these products are used. The Basics, describes the fundamental fabrication, operation and functions. And Common Questions addresses frequently asked questions from Production Engineers, and Designers. an9671.pdf (59 K)
  	AN9767 - Littelfuse Varistors: Basic Properties, Terminology and Theory  This application note describes the basic properties of varistors. Varistors are voltage dependent, nonlinear devices which have an electrical behavior similar to back-to-back zener diodes. The symmetrical, sharp breakdown characteristics enable the varistor to provide excellent transient suppression performance. Littelfuse_app-note_an9767.pdf (1,094 K)
  	AN9768 - Transient Suppression Devices and Principles  This application note discusses the two major categories of transient suppressors: a) those that attenuate transients, thus preventing their propagation into the sensitive circuit; and b) those that divert transients away from sensitive loads and so limit the residual voltages. an9768.pdf (125 K)
  	AN9769 - An Overview of Electromagnetic and Lightning Induced Voltage Transients  This application note is an overview of the sources and nature of various transient overvoltages, and the problems that may result. an9769.pdf (180 K)
  	AN9773 - Varistor Testing  This application note details the common tests of varistor parameters and describes suitable test methods using simplified test circuits. All tests are performed at 25° C, unless otherwise specified. The test circuits and methods given are intended as a general guide. Since the tests frequently entail high voltages and currents, users must exercise appropriate safety precautions. an9773.pdf (274 K)
  	EC638 - Littelfuse Varistor Design Examples  This application note is a guide for selecting a varistor by describing common application examples, and illustrating the solution process to determine the appropriate varistor. The note also describes series/parallel connection rules. EC638.pdf (356 K)

• Plant Certifications

  	Dongguan, BeiCe ISO 14001-2004  MOV Factory Littelfuse_Dongguan-BeiCe-MOV_ISO14001-2004.pdf (103 K)
  	Dongguan, BeiCe ISO 9001-2000  MOV/MLV Factory Littelfuse_Dongguan-BeiCe-MOV_ISO9001-2000.pdf (339 K)
  	Dongguan, BeiCe ISO TS16949  Littelfuse_Dongguan-BeiCe-MOV_ISO-TS16949.pdf (209 K)

• PSPICE Models

  	CH8 Series OLB Graphic File  CH8SERIES.OLB (15 K)
  	CH8 Series PSpice lib File  CH8series.lib (3 K)
  	CH8 Series slb File  CH8series.slb (8 K)

• Reliability Reports

  CH Series Reliability Data Summary  CHSeries.html (10 K)

Environmental Data

• Environmental Info
  
  
  
• ICP Test Reports
   ICPTest VxxCHxx.pdf
  
• China RoHS Reports
   ChinaRoHS VxxxCHxx.pdf