DB Series - 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 #SizeVMAX AC (V)VMAX DC (V)WTM (J)(ITM 1xAmps (A)VNDC
(V)
VNDC MIN
(V)
VNDC MAX (V)Vc (V)PolarityStockSamplesCompare
V131DB4040mm13017527040000200184228345Bi-directionalCheckOrder
V151DB4040mm15020030040000240212268405Bi-directionalCheckOrder
V251DB4040mm25033037040000390354429650Bi-directionalCheckOrder
V271DB4040mm27536940040000430389473730Bi-directionalCheckOrder
V321DB4040mm32042046040000510462561830Bi-directionalCheckOrder
V421DB4040mm420560600400006806107481130Bi-directionalCheckOrder
V481DB4040mm480640650400007506708251240Bi-directionalCheckOrder
V511DB4040mm510675700400008207359101350Bi-directionalCheckOrder
V571DB4040mm5757307704000091080510001480Bi-directionalCheckOrder
V661DB4040mm66085090040000105094011601720Bi-directionalCheckOrder
V751DB4040mm7509701050400001200108013202000Bi-directionalCheckOrder

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

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.

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.

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.

pdf icon Combining GDTs and MOVs for Surge Protection of AC Power Lines Application Note

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.

DADB Data Sheet

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