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Product name: Surge protection zinc oxide varistor

Item: 25D series

Details:
Zinc Oxide Varistor 25D series

Brief Introduction:
Varistors are nonlinear resistors mainly composed of zinc oxide as the main material of metal oxide semiconductor components,and they can be divided into symmetric (non-polarity) and asymmetric (with polarity) according to the voltage-ampere characteristic. The nonlinear resistors are more sensitive to voltage, when voltage reached one set value, resistance conducts rapidly.Due to characteristics of high effective nonlinear coefficient,large through-flow capacity,fast action and no continued flow,they are mainly used for the absorption of various operating surge & lightning wave voltage and lightning protection of electronic equipments,which can prevent such voltage interfering with the normal operation or damaging the various circuit elements.

Product Application:
Widely applied in surge protection of different Electronic Engineering areas:
1.Telecommunications
2.Electricity
3.Home appliances
Example: telephones,converter,power meter, power distribution cabinets, socket box, distribution box, power switch, power lightning protection box, voltage regulator, lightning arrester (SPD surge protection special).

Working principle:
When varistor in a rest state, relative to the protected electronic components, has a very high impedance (number megohm) without changing circuit characteristics of the original design.When achieve the momentary surge voltage (more than breakdown voltage of the varistor), the zinc oxide varistor impedance will be low (only a few ohms.) and caused the original short circuit.In other words, electronic products or components are thus protected.

Advantages:
1.Wide voltage range
2.Large capacitance and energy tolerance
3.High effective nonlinear coefficient
4.Little leakage current
5.Symmetrical volt-ampere characteristic
6.Low residual voltage
7.Fast action
8.No continued flow
9.Excellent voltage ratio
10.Strong surge absorption ability
11.High surge current handling capability
12.Stable voltage Inhibition execution ability
13.Excellent material
14.Reliable operation
15.Long service life
16.Wide application

Zinc oxide varistor Specifications
1. Oxide varistor voltage: 18~1600V
2. Max. allowable voltage: 10~1000V(AC) 14~1280V(DC)
3. Capacitance(reference)@1KHz:450-45000pf
 

N(Standard) Series

Diameter:25mm

This series products have passed safety approval as below:
CUL  UL 1449 3rd version
VDE  IEC 60950-1 Annex Q
Remarks:Except for the reference size and parameter above,different electrical parameter and encapsulation mode can be custom made per client's requirement.
You can send us required specifications to info@dxmht.com or provide reference samples to our factory office:
        SHENZHEN DXM TECHNOLOGY CO., LTD
        FLOOR 2,BLOCK C,SANHE INTERNATIONAL SCIENCE AND TECHNOLOGY ZONE DALANG STREET,BAOAN DISTRICT
        SHENZHEN,GUANGDONG 518109 CHINA 
        Attention:Ivan Wong
And then samples&orders can be custom made per your requirement.