About Varistors

Cov Varistors

A varistor (also known as a voltage-dependent resistor, or VDR) is a resistor whose resistance changes as the voltage across it increases or decreases. Varistors are typically constructed from a ceramic material containing semiconductor materials such as silicon and germanium. They have a relatively large resistance at low voltage levels, but as the voltage increases, their resistance drops significantly, allowing more current to flow through them. This feature makes them useful for absorbing transient voltages, which are sudden increases in the voltage that can occur when a device is powered on or off. Varistors are also commonly used to provide overvoltage protection, where they absorb and dissipate excessive voltages before they reach sensitive electronic components.

Varistors

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(Ex. GST)(▲▼)		Enter Qty ProductVoltage Rating DCVoltage Rating ACClamping VoltageDiameterPeak Surge CurrentSurge Energy RatingCapacitanceOperating Temperature RangeTermination StylePackagingPackage / CaseSeriesMounting StyleVaristor VoltageMinimum Operating TemperatureMaximum Operating TemperatureQualification
  
                      
20N471K


Varistors Through Hole RoHS
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COV 7
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USD 0.6936
Multiples of: 1

   775 V          423 V ~ 517 V   
14N511K


Varistors Through Hole RoHS
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This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

COV 6
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USD 0.4553
Multiples of: 1

   250 V          135 V ~ 165 V   
20D561K


Varistors 460V 925V 6.5KA Through Hole RoHS
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COV 4
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USD 0.1294
Multiples of: 5

   925 V          504 V ~ 616 V   
20D820K


Varistors 65V 82 (74~90) 135V 400A Through Hole RoHS
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This product is classified as Large/Heavy, additional shipping charges may apply. A customer service representative may contact you after ordering to confirm exact shipping charges.

COV 4
Ships to you
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USD 0.1379
Multiples of: 1

   135 V          74 V ~ 90 V   
20D681K


Varistors 560V 1120V 6.5KA Through Hole RoHS
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COV 4
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USD 0.1414
Multiples of: 5

   1120 V          680 (612 ~ 748)   
20D101K


Varistors 85V 165V 6.5KA Through Hole RoHS
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COV 3
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USD 0.1291
Multiples of: 1

   165 V              
20D270K


Varistors 22V 53V Through Hole RoHS
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COV 1
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USD 0.126
Multiples of: 1

   53 V          23 V ~ 31.1 V   
05D511K


Varistors 415V 845V 400A Through Hole RoHS
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COV 0
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USD 0.0162
Multiples of: 20

   845 V              
05D621K


Varistors 505V 1025V 400A Through Hole RoHS
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COV 0
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USD 0.0162
Multiples of: 20

   1025 V          558 V ~ 682 V   
07D361K


Varistors 300V 360 (324~396) 620V 1.2KA Through Hole RoHS
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COV 0
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USD 0.0172
Multiples of: 20

   620 V              
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