What Are the Functions of Varistor?

Share
laihuijuan / 2018-06-22 / Tech

Varistor is a non-linear voltage limiting resistor which is zinc oxide as the main component of the metal oxide semi-conductor.
 
 
Work Principle of Varistor
Varistor works as a zinc oxide varistors and additives in certain conditions "sintering", the resistance will be strongly influenced by the voltage, the current increases sharply as the voltage rise and rise of the curve is a non-linear index. When the normal operating voltage, the varistor is in a high resistance state. When the surge arrives, it is in the path state, a strong current flows through the vent into the earth itself. After the surge, he immediately returned to the high resistance state.
 
 
Where Varistor are Often Used in?
Varistor is a quite extensive use of electronic components, also it is the most widely used device of a transient disturbance absorption. The main electronic equipment that used it as following:
1. Power system
2. Mine wiring board
3. Security Systems
4. Motor Protection
5. Telecom Equipment
6. Automotive electronic systems
7. Home Appliances
 
 
The “Safety Value” Function of Varistor Circuit
What’s the function of electornic components - varistors? The biggest characteristic of varistor is while the added voltage on it is lower than its threshold, the current flowing through it is very small, which equivalents of a shut valve; and while the voltage exceeds the UN, the flow through it current surge, which equivalents of the valve open. Using this feature, you can often suppress the abnormal circuit over-voltage, and protect the circuit from damage of the over-voltage.
Relevant articles recommend

Top suppliers

Response Time

24h

Response Rate

0%

Product:IC, CAPACITORS DIODES LED ....
1YRS

Response Time

24h

Response Rate

100.00%

Product:Photo Coupler,Optocoupler,IC,TOS,ON,AVAGO,SHARP,RENESAS,CT,EL,LTV,TI,NXP,ST
1YRS

Response Time

24h

Response Rate

100.00%

Product:Infrared Receiver Module,Infrared Emitting Diode,Silicon PIN Photodiode,Silicon Phototransistor,LED,Silicon Photocell,Hall Effect IC,Photoelectric switch,Photoelectric encoder,IC.
1YRS

Response Time

24h

Response Rate

100.00%

Product:KSD301 KSD9700 thermostat thermal protector fuse sensor
1YRS

Response Time

24h

Response Rate

0%

Product:IC,PCB,module,capacitor,resistor,diodes,LED,LCD
1YRS

Response Time

24h

Response Rate

100.00%

Product:Electronics components,ICs,MCU,RS-485/RS-422 Transceiver
9YRS
Subscribe News

Enter your email address:

Hot News

Contact Us

+86-755-83536845

One to One Customer Service

17190417227