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
  
                      
Z25M271S


Varistors 270V 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 31.639
Multiples of: 100

 210 V150 V595 V 4.5 kA155 J540 pF- 40 C to + 85 C Bulk Z25m  - 40 C+ 85 C 
Z33M271S


Varistors 270V 20000A 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 31.639
Multiples of: 100

 210 VDC150 VAC1.5 kV16 mm4.5 kA255 J250 pF RadialBulk Z33MPCB Mount - 40 C+ 85 C 
Z33M331S


Varistors 330V 20000A 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 31.639
Multiples of: 100

 245 VDC175 VAC36 V12.5 mm500 A310 J0.016 uF RadialBulk Z33MPCB Mount - 40 C+ 85 C 
Z33M221S


Varistors 220V 20000A 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 31.639
Multiples of: 100

 165 VDC125 VAC1.355 kV16 mm4.5 kA200 J280 pF RadialBulk Z33MPCB Mount - 40 C+ 85 C 
Z25M331S


Varistors 330V 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 31.639
Multiples of: 100

 245 VDC175 VAC650 V16 mm4.5 kA185 J500 pF RadialBulk Z25MPCB Mount - 40 C+ 85 C 
Z33M391S


Varistors 390V 20000A 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 37.4599
Multiples of: 100

 295 VDC210 VAC43 V12.5 mm500 A360 J0.011 uF RadialBulk Z33MPCB Mount - 40 C+ 85 C 
Z33M471S


Varistors 470V 20000A 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 37.4599
Multiples of: 100

 350 VDC250 VAC65 V12.5 mm500 A385 J6300 pF RadialBulk Z33MPCB Mount - 40 C+ 85 C 
Z33M441S


Varistors 440V 20000A 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 37.4599
Multiples of: 100

 335 VDC240 VAC53 V12.5 mm500 A370 J8000 pF RadialBulk Z33MPCB Mount - 40 C+ 85 C 
Z25M681S


Varistors 680V 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 38.1997
Multiples of: 100

 510 V365 V1.12 kV 4.5 kA280 J320 pF- 40 C to + 85 C Bulk Z25m  - 40 C+ 85 C 
Z25M561S


Varistors 560V 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 38.1997
Multiples of: 100

 420 VDC300 VAC930 V16 mm4.5 kA260 J340 pF RadialBulk Z25MPCB Mount - 40 C+ 85 C 
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