Categories

The varistor is two terminal device. The varistor, like the diode, is sensitive to the voltage across it. However, the varistor is designed to conduct at a specified forward and reverse biased voltage.

Ideally, it acts like an open if the voltage across the varistor is less than the specification voltage. If the varistor voltage is exceeded with either polarity, it turns on and holds its rated voltage across itself and any connected component.

The schematic symbol of Figure (a) reflects the diode nature of the device. The two opposing diodes reflect that the device is designed to turn on in both directions as shown by its schematic symbol and by its characteristic curve of Figure (b). This figure shows this varistor turning on when its voltage drop exceeds 100 V in either direction. If its voltage drop is less than 100 V, the varistor is off and acts like an open.

Typically a varistor is placed across another electrical component to protect it from excessive voltage drops. If the voltage drop across the varistor is less than the specified voltage, the varistor acts like an open and plays no part in the circuit. If the voltage drop across the varistor exceeds its specification, then the varistor turns on and maintains a fixed voltage drop. In the example of Figure (b), if the varistor turns on, the voltage across it and its companion component is limited to 100 V. Thus the voltage drop across the component placed across the varistor could not exceed 100 V.

H N1 39ZC1 Metal Oxide Varistor 39VAC 9mm DISC
Product details of H N1 39ZC1 Metal Oxide Varistor 39VAC 9mm DISCZinc Oxide Varistors is used to V..
MDC Z151 Zinc Oxide Varistor 150VAC 8mm DISC
Product details of MDC Z151 Zinc Oxide Varistor 150VAC 8mm DISCZinc Oxide Varistors is used to Varis..
VE130301 Zinc Oxide Varistor 300VAC 13mm DISC
Product details of VE130301 Zinc Oxide Varistor 300VAC 13mm DISCZinc Oxide Varistors is used to Vari..
VE170151 Zinc Oxide Varistor 150VAC 17mm DISC
Product details of VE170151 Zinc Oxide Varistor 150VAC 17mm DISCZinc Oxide Varistors is used to Vari..
VE170600 Zinc Oxide Varistor 60VAC 17mm DISC
Product details of VE170600 Zinc Oxide Varistor 60VAC 17mm DISCZinc Oxide Varistors is used to Varis..
VE171060 Zinc Oxide Varistor 1060V AC 17mm DISC
Product details of VE171060 Zinc Oxide Varistor 1060V AC 17MM DISCZinc Oxide Varistors is used to Va..
SVC 121 Zinc Oxide Varistor 120VAC 11mm DISC
Product details of SVC 121 Zinc Oxide Varistor 120VAC 11mm DISCZinc Oxide Varistors is used to Var..
SVC 121 Zinc Oxide Varistor 120VAC 8mm DISC
Product details of SVC 121 Zinc Oxide Varistor 120VAC 8mm DISCZinc Oxide Varistors is used to Vari..
SVC 561 Zinc Oxide Varistor 560VAC 11mm DISC
Product details of SVC 561 Zinc Oxide Varistor 560VAC 11mm DISCZinc Oxide Varistors is used to Var..
JVR 7N301K Zinc Oxide Varistor 300VAC 7mm DISC
Product details of JVR 7N301K Zinc Oxide Varistor 300VAC 7mm DISCZinc Oxide Varistors is used to Var..
Out of stock
JVR 7N391K Zinc Oxide Varistor 390VAC 7mm DISC
Product details of JVR 7N391K Zinc Oxide Varistor 390VAC 7mm DISCZinc Oxide Varistors is used to V..
JVR 7N820K Zinc Oxide Varistor 82VAC 7mm DISC
Product details of JVR 7N820K Zinc Oxide Varistor 82VAC 7mm DISCZinc Oxide Varistors is used to Va..
Zenamic 220 Metal Oxide Varistor 22VAC 8mm DISC
Product details of Zenamic 220 Metal Oxide Varistor 22VAC 8mm DISCZinc Oxide Varistors is used to ..
Out of stock
10k201 Varistor
Rs.30.0
10k201 Varistor..
Out of stock
10k471 Varistor
Rs.30.0
10k471 Varistor..
Out of stock
10nM 1kV Varistor
10nM 1kV Varistor..
Out of stock
S14k20 Varistor
Rs.30.0
S14k20 Varistor..
Out of stock
14D200 Varistor
Rs.30.0
14D200 Varistor..
TTC202 Varistor
Rs.30.0
TTC202 Varistor..
Out of stock
7k221 Varistor
Rs.30.0
7k221 Varistor..
VDR022 Varistor
Rs.35.0
VDR022 Varistor..
Out of stock
7k82 Varistor
Rs.30.0
7k82 Varistor..
Out of stock
20D681K Varistor
20D681K Varistor MAX AC: 420 MAX DC: 560 Varistor Voltage: 680(612~748) ..
Out of stock
20k241 Varistor
Rs.30.0
20k241 Varistor..
Out of stock
275L40B 140J 275VAC 20MM Varistor
275L40B Varistor ..
2504 Varistor
Rs.45.0
2504 Varistor Used..
Out of stock
7N201K Varistor
Rs.45.0
7N201K Varistor..
Out of stock
7N471K Varistor
Rs.45.0
7N471K Varistor..
ZOV 20D241K Metal Oxide Varistor 240VAC 20mm DISC
Product details of ZOV 20D241K Metal Oxide Varistor 240VAC 20mm DISCZinc Oxide Varistors is used t..
Out of stock
Rs.30.0
Out of stock
Rs.30.0
Out of stock
Out of stock
Rs.30.0
Out of stock
Rs.30.0
Out of stock
Rs.30.0
Out of stock
Rs.30.0
Out of stock
Out of stock
Rs.30.0
Out of stock
Rs.45.0
Out of stock
Rs.45.0
Showing 1 to 29 of 29 (1 Pages)