Zinc oxide varistor

 

1.Uses

Zinc oxide varistor is a sort of sensitive component which resistance value can vary with the applied voltage , it is widely used in electrical and electronic equipments to protect them from damage of transient overvoltage and for surge absorption .

 

 

2.Features

Broad varistor voltage range :18V to 1.8KV

Fast response to transient voltage (ns)

High great withstanding surge current

Excellent non-linearity voltage

Symmetric V-I characteristic

No following-on current

Long life

 

 

3.Range of application

Used in surge protection for IC , transistor , diode semiconductor switch circuits .

Used in communication ,telemetering,electrical control and various electronic equioments.

Suppress the instantaneous overvoltage caused by electromagnetic valve and relay .

Suppress the instantaneous overvoltage caused by power supply.

Suppress the instantaneous overvoltage caused by electronic circuits.

Lighting protection for various kingd of electronic appliances .

 

 

4.Technical conditions

The zinc oxide varistor carry out standards of GB/T10193 , GB/T10194, GB/T10195-1997 and SJ/T10348-10349 .

Measurement conditions : for varistor of 05D,07D,10D,14D,20D series , voltage across the varistor measured under 1mADC .

Varisor voltage : the voltage between two terminals with the specified measureing current applied is expressed by letter V .

Maximum continuous operating voltage :the maximum sinusoidal RMS voltage or maximum DC voltage that can be applied continuously in the specified environmental temperature range .

Working ambient temperature : -40℃ ~ +85℃

Storage temperature range : -40℃ ~ +125℃

 

5.Recognized standards and certificates

Recognized organization	Recognized marks	Recognized standard	Certificates series No
CQC		GB/T10193-1997;  GB/T10194-1997; GB8898-2011; GB4943.1-2011	CQC05001012670
UL		UL1449	E321851
CUL		UL1449	E321851
VDE		DIN EN 61051-1: 2009-04 IEC 61051-1:2007-04 IEC 61051-2:1991-01 IEC 61051-2(ed.1);am1:2009-05 IEC 61051-2-2:1991-01	40027789

 

 

 

8.Part size

description	Size code	Type and dimension (mm)
		ZVR05D	ZVR07D	ZVR10D	ZVR14D	ZVR20D
Product diameter	Dmax	7	9	12	16	22
Product thickness	Tmax	4~7	5~7	5~9	5~14	5~14
Lead diameter	d(±0.1)	0.6	0.6	0.8	0.8	1
Lead spacing	F(±1)	5	5	7.5	7.5	10
Lead length	Lmin	25	25	25	25	25
Coat drop	DRmax	3	3	3	3	3