D85 Metal Oxide Varistor for Surge Arrester

China 
                        D85 Metal Oxide Varistor for Surge Arrester
                      manufacture and supplier

D85 Metal Oxide Varistor for Surge Arrester image

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D85 Metal Oxide Varistor for Surge Arrester

D85 Varistor

Varistor

Standard

5% 10%

Standard

Standard

Surface Mount

0.25W

Metal Oxide

YongDe

Carton

Zhejiang, China (Mainland)

85353000

Product Details

Key Specification/special feature

Brand: YONGDE

Type:D85H22.5

Material: Zinc oxide

Demensions: diameter 85 mm , height 22.5mm

D.C reference voltage: 4.7±0.25 KV

Leakage current at 0.75 time D.C reference voltage:  <50μA

Rated voltage: 3.32&plusmn;0.2KV

Continuous operating current: 2.66KV

Long durationg(2ms rectangular) current impulse withstand:1600A

4/10μs high current impulse withstand:100KA

Residual voltage at nominal disscharge current:

6.8&plusmn;0.1KV/5KA

7.4&plusmn;0.1KV/10KA

8.4&plusmn;0.1KV/20KA

9.2&plusmn;0.1KV/40KA

Accelerating aging coefficicent:<1.0

 

Zinc oxide varistor:

Description: Zinc oxide varistor is the core of the arrester,which main component is Zinc Oxide and with a small quantity of bismuth oxide, fluoride oxide, manganous carbonate, antimony oxide and other gleam of additive and made with high temperature.

Metal oxide Varistors microsturcture mainly constitute of Zinc Oxide grain, grain boundary layer and chienship phase. And its electric conduction principle lies that Zinc Oxide grain has good electro conductibility, and the voltage to the Zinc Oxide is almost act on high resistant grain boundary layer. Varistors nonlinearity mainly comes from grain boundary layer(the main ingredient is bismuth oxide) chienship phase scattered throughout the grain boundary layer which is the multiple oxide of Zinc Oxide and bismuth oxide. Its function lies in restraining the growing of Zinc Oxide grain to make the better nonlinearity.
 

Features:
large 2000μs rectangular impulse absorption capacity
Large 4/10μs high current impulse withstand

 

 

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