DB - High Energy Industrial Varistor Series

Series: DB Questions? Contact Littelfuse Support
DB
The DA and DB Series transient surge suppressors are heavy-duty industrial metal-oxide varistors designed to provide surge protection for motor controls and power supplies used in oil-drilling, mining, and transportation equipment.
  • These UL-recognized varistors have identical ratings and specifications but differ in case construction to provide flexibility in equipment designs.
  • DA series devices feature rigid terminals to insure secure wire contacts.
  • Both the DA and DB series feature improved creep and strike distance capability to minimize breakdown along the package surface design that provides complete electrical isolation of the disc subassembly.

Features:
  • High energy absorption capability
    WTM up to 1050J
  • Wide operating voltage range
    VM(AC)RMS 130V to 750V
  • Screw terminals (DA Series),quick connect push-on connectors (DB Series)
  • Case design provides complete electrical isolation of disc subassembly
  • 40mm diameter disc
  • No derating up to 85ºC ambient
  • RoHS compliant

Access specifications, certifications, check availability and order parts below

Catalog #CertificatesSizeVMAX AC (V)VMAX DC (V)WTM (J)(ITM 1xAmps (A)VNDC
(V)		VNDC MIN
(V)		VNDC MAX (V)Vc (V)StockSamples
V131DB4040mm13017527040000200184228345CheckOrder
V151DB4040mm15020030040000240212268405CheckOrder
V251DB4040mm25033037040000390354429650CheckOrder
V271DB4040mm27536940040000430389473730CheckOrder
V321DB4040mm32042046040000510462561830CheckOrder
V421DB4040mm420560600400006806107481130CheckOrder
V481DB4040mm480640650400007506708251240CheckOrder
V511DB4040mm510675700400008207359101350CheckOrder
V571DB4040mm5757307704000091080510001480CheckOrder
V661DB4040mm66085090040000105094011601720CheckOrder
V751DB4040mm7509701050400001200108013202000CheckOrder
ICPTest_DADB_Series_12 24 2010 pdf

Littelfuse_Dongguan BeiCe MOV_ISO TS16949icon Dongguan BeiCe ISO TS16949

Littelfuse_Dongguan BeiCe MOV_ISO14001 2004icon Dongguan BeiCe ISO 14001 2004

MOV Factory
Littelfuse_Dongguan BeiCe MOV_ISO9001 2000icon Dongguan BeiCe ISO 9001 2000

MOV/MLV Factory
an9311icon 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.
an9768icon 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.
an9769icon 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.
an9773icon 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.
ec608icon EC608 Considerations for Selecting Littelfuse MOVs and Fuses for Industrial Motor Applications

This application note discusses the first level considerations for applying both Littelfuse Industrial AC Line Metal Oxide Varistors and associated AC line Fuses with a motor protection example.
EC638icon 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.
EC640icon EC640 Combining GDTs and MOVs for Surge Protection of AC Lines

This application note illustrates how to design high performance, cost-effective surge protection for equipment connected to AC power lines. The role of gas discharge tube (GDT) surge arresters specifically designed for AC power line protection is also be discussed.
Littelfuse_app note_an9767icon 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.
DADB Data Sheet

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