About Varistors

Semitec 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
  
                      
Z21D361


Varistors 360V 6500A 22.5mm
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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.

Semitec Availability : 0
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USD 0.6403

Multiples of: 1

 300 VDC230 VAC710 V12.5 mm2.5 kA255 J270 pF RadialBulk Z21DPCB Mount - 40 C+ 85 C 
Z21D180


Varistors 18V 2000A 22.5mm
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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.

Semitec Availability : 0
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USD 0.6646

Multiples of: 1

 14 VDC11 VAC200 V12.5 mm2.5 kA13 J1400 pF RadialBulk Z21DPCB Mount - 40 C+ 85 C 
Z21D560


Varistors 56V 2000A 22.5mm
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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.

Semitec Availability : 0
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USD 0.6646

Multiples of: 1

MOV45 VDC35 VAC1.5 kV22.5 mm2.5 kA41 J120 pF RadialBulk Z21DPCB Mount56 V- 40 C+ 85 C 
Z21D330


Varistors 33V 2000A 22.5mm
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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.

Semitec Availability : 0
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USD 0.724

Multiples of: 1

 26 VDC20 VAC595 V12.5 mm2.5 kA24 J300 pF RadialBulk Z21DPCB Mount - 40 C+ 85 C 
Z21D681


Semitec Varistors 680V 6500A 22.5mm
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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.

Semitec Availability : 0
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USD 1.4552

Multiples of: 1000

 560 VDC420 VAC200 V16 mm4.5 kA382 J2700 pF- 40 C to + 85 C Bulk Z21d  - 40 C+ 85 C 
Z21D751


Varistors 750V 6500A 22.5mm
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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.

Semitec Availability : 0
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USD 1.6008

Multiples of: 1000

 615 VDC460 VAC250 V16 mm4.5 kA420 J2200 pF RadialBulk Z21DPCB Mount - 40 C+ 85 C 
Z21D102


Varistors 1000V 6500A 22.5mm
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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.

Semitec Availability : 0
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USD 1.7099

Multiples of: 1000

 825 V625 V135 V 250 A565 J1200 pF- 40 C to + 85 C Bulk Z21d  - 40 C+ 85 C 
Z25M221S


Varistors 220V 10000A mm
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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.

Semitec Availability : 0
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USD 21.9133

Multiples of: 100

 165 V120 V545 V 4.5 kA125 J580 pF- 40 C to + 85 C Bulk Z25m  - 40 C+ 85 C 
Z25M441S


Varistors 440V 10000A mm
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Semitec Availability : 0
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USD 24.4963

Multiples of: 100

 335 VDC240 VAC775 V16 mm4.5 kA225 J400 pF RadialBulk Z25MPCB Mount - 40 C+ 85 C 
Z25M391S


Varistors 390V 10000A mm
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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.

Semitec Availability : 0
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USD 24.4963

Multiples of: 100

 295 V210 V710 V 4.5 kA215 J450 pF- 40 C to + 85 C Bulk Z25m  - 40 C+ 85 C 
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