DB Series - High Energy Industrial Varistor Series

Series: DB
Questions? Contact Littelfuse Support
Varistor DA DB Image
Roll Over to Zoom
Disclaimer Notice

Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse. "Littelfuse" includes Littelfuse, Inc., and all of its affiliate entities.

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 #VMAX AC (V)VMAX DC (V)WTM (J)(ITM 1xAmps (A)VNDC
(V)		VNDC MIN
(V)		VNDC MAX (V)Vc (V)PolarityCo Typ
(pF)		StockSamplesCompare
V131DB4013017527040000200184228345Bi-directional10000CheckOrder
V151DB4015020030040000240212268405Bi-directional8000CheckOrder
V251DB4025033037040000390354429650Bi-directional5000CheckOrder
V271DB4027536940040000430389473730Bi-directional4500CheckOrder
V321DB4032042046040000510462561830Bi-directional3800CheckOrder
V421DB40420560600400006806107481130Bi-directional3000CheckOrder
V481DB40480640650400007506708251240Bi-directional2700CheckOrder
V511DB40510675700400008207359101350Bi-directional2500CheckOrder
V571DB405757307704000091080510001480Bi-directional2200CheckOrder
V661DB4066085090040000105094011601720Bi-directional2000CheckOrder
V751DB407509701050400001200108013202000Bi-directional1800CheckOrder
Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s) IPC-Material Declaration
V131DB40 DB VARISTOR 40MM RoHS No 08/12/2006 PbFree No 08/12/2006 No
V151DB40 DB VARISTOR 40MM RoHS No 08/12/2006 PbFree No 08/12/2006 CoC_RoHS10_V151DB40 REACH191_Declaration_V151DB40 No
Does not Contain
V251DB40 DB VARISTOR 40MM RoHS No 08/12/2006 PbFree No 08/12/2006 No
V271DB40 DB VARISTOR 40MM RoHS No 08/12/2006 PbFree No 08/12/2006 CoC_RoHS10_V271DB40
V321DB40 DB VARISTOR 40MM RoHS No 08/12/2006 PbFree No 08/12/2006 CoC_RoHS10_V321DB40 REACH211_Declaration_V321DB40
Does not Contain
V421DB40 DB VARISTOR 40MM RoHS No 08/12/2006 PbFree No 08/12/2006 CoC_RoHS10_V421DB40 REACH211_Declaration_V421DB40 No
Does not Contain
V481DB40 DB VARISTOR 40MM RoHS No 08/12/2006 PbFree No 08/12/2006 No
V511DB40 DB VARISTOR 40MM RoHS No 08/12/2006 PbFree No 08/12/2006 No
V571DB40 DB VARISTOR 40MM RoHS No 08/12/2006 PbFree No 08/12/2006 No
V661DB40 DB VARISTOR 40MM RoHS No 08/12/2006 PbFree No 08/12/2006 No
V751DB40 DB VARISTOR 40MM RoHS No 08/12/2006 PbFree No 08/12/2006 No
If the product environmental information that you are looking for does not appear in this tab,
please complete the Product Environmental Information Request Form.

pdficon Varistors DA and DB Datasheet

pdficon Circuit Protection Technology Application Matrix

Littelfuse is the world leader in the design and manufacturing of fuses for the automotive industrial handheld computer and telecom markets...
pdficon 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.
pdficon 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.
pdficon Varistors Catalog

Catalog with varistors metal oxide varistors multilayer varistors MLVs surface mount varistors radial lead varistors disc varistors industrial varistors high energy varistors...
pdficon 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.
pdficon Circuit Protection Products Selection Guide