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
  
                      
Z25M471S


Varistors 470V 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 : 82
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USD 23.916
Multiples of: 1

 350 V250 V845 V 4.5 kA235 J350 pF- 40 C to + 85 C Bulk Z25m  - 40 C+ 85 C 
Z10D391


Varistors 390V 2500A 12.5mm
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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 : 65
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USD 0.3025
Multiples of: 1

MOV320 VDC250 VAC1.175 kV12.5 mm10 kA70 J1250 pF RadialBulk Z10DPCB Mount390 V- 40 C+ 85 C 
Z21D390


Varistors 39V 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 : 33
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USD 0.66
Multiples of: 1

 31 VDC25 VAC775 V12.5 mm2.5 kA28 J230 pF RadialBulk Z21DPCB Mount - 40 C+ 85 C 
Z21D241


Varistors 240V 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 : 19
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USD 0.66
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MOV200 VDC150 VAC395 V22.5 mm2.5 kA168 J380 pF RadialBulk Z21DPCB Mount240 V- 40 C+ 85 C 
Z21D821


Varistors 820V 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 : 17
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USD 1.65
Multiples of: 1

MOV670 VDC510 VAC360 V22.5 mm4.5 kA460 J740 pF RadialBulk Z21DPCB Mount820 V- 40 C+ 85 C 
Z7D271


Varistors 270V 1250A 8.5mm
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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 0.2122
Multiples of: 1

 225 V175 V455 V 6.5 kA24 J1300 pF- 40 C to + 85 C Bulk Z7d  - 40 C+ 85 C 
Z7D470


Varistors 47V 250A 8.5mm
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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 0.2122
Multiples of: 1

 38 VDC30 VAC930 V22.5 mm6.5 kA2.8 J750 pF RadialBulk Z7DPCB Mount - 40 C+ 85 C 
Z7D471


Varistors 470V 1250A 8.5mm
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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 0.2122
Multiples of: 1

 385 V300 V1.12 kV 6.5 kA42 J650 pF- 40 C to + 85 C Bulk Z7d  - 40 C+ 85 C 
Z7D391


Semitec Varistors 390V 1250A 8.5mm
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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
Ship by 6 to 16 Weeks Calender.png

USD 0.2122
Multiples of: 1

 320 VDC250 VAC775 V22.5 mm6.5 kA35 J900 pF- 40 C to + 85 C Bulk Z7d  - 40 C+ 85 C 
Z7D241


Varistors 240V 1250A 8.5mm
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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
Ship by 6 to 16 Weeks Calender.png

USD 0.2122
Multiples of: 1

 200 VDC150 VAC360 V22.5 mm6.5 kA21 J1600 pF RadialBulk Z7DPCB Mount - 40 C+ 85 C 
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