Metal Oxide Varistor for Surge Avaristorrrester

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Product Name:

Metal Oxide Varistor for Surge Avaristorrrester

Model NO.:

D31

Type:

Varistor

Package Type:

Surface Mount

Technology:

Metal Oxide

Trademark:

YONG'DE

Transport Package:

Carton

Origin:

Zhejiang, China (Mainland)

HS Code:

85353000

Product Details

Product About

Key Specification/special feature

Brand: YONGDE

Type:D31H24

Material: Zinc oxide

Demensions: diameter 31 mm , height 24mm

D.C reference voltage: 5.3KV

Leakage current at 0.75 time D.C reference voltage: <30μA

Rated voltage: 3.75KV

Continuous operating current: 3KV

Long durationg(2ms rectangular) current impulse withstand:250A

4/10μs high current impulse withstand:65KA

Residual voltage at nominal disscharge current:

9.1KV/5KA

10.3KV/10KA

11.3KV/20KA

Accelerating aging coefficicent:<1.0

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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