Metal Oxide Varistors

What are they?
Metal Oxide Varistors, more commonly known as ’MOVs’ are devices that provide excellent transient voltage suppression. They are a type of non-linear device that feature similar characteristics to Zener diodes. They are used to protect vulnerable electronic circuits and components from overvoltage conditions that can cause damage. Any potentially destructive overvoltage energy is dissipated as heat.
Construction:
Metal oxide varistors are typically constructed from zinc oxide and combined with small additions of other metal oxides such as cobalt, magnese or bismuth. These materials are sintered into ceramic casings during manufacture. Although MOVs are available in different formats, they are most commonly radial leaded discs.
Applications:
• Suppression of lightning and other high levels of transient energy
• Low voltage power supplies in DC circuits
• Low voltage power supply in automotive applications
• Protection from internal transients within capacitor discharges, relay switching and inductive load switching

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Description Price Varistor Voltage Maximum AC Voltage Rating Maximum DC Voltage Rating Clamping Voltage Clamping Current Energy Series Diameter Maximum Surge Current Capacitance Length Depth Thickness Dimensions
RS Stock No. 851-8414
Mfr. Part No.MOV-20D821K
BrandBourns
PHP52.48
Each
units
820V - 670V 1355V 100A 265J MOV-20D 23mm - 500pF - - 7.8mm 23 (Dia.) x 7.8mm
RS Stock No. 720-9835
Mfr. Part No.ERZV07D391
BrandPanasonic
PHP13.64
Each (In a Pack of 10)
units
390V 250V 320V 650V 10A 35J ZNR 8.5mm 1750A 130pF - - 5.4mm 8.5 (Dia.) x 5.4mm
RS Stock No. 110-1959
Mfr. Part No.ERZV20D471
BrandPanasonic
PHP46.165
Each (In a Bag of 1000)
units
470V 300V 385V 775V - - ZNR - 10000A 900pF - - - 21.5 (Dia.) x 6.6mm
RS Stock No. 476-9450
Mfr. Part No.Z15D471
BrandSEMITEC
PHP113.19
Each (In a Pack of 10)
units
470V 300V 385V 775V 50A 175J - 16mm 4500A 400pF - - 9.1mm 16 (Dia.) x 9.1mm
RS Stock No. 110-1961
Mfr. Part No.ERZV20D431
BrandPanasonic
PHP45.066
Each (In a Bag of 1000)
units
430V 275V 350V 710V - - ZNR - 10000A - - - - 21.5 (Dia.) x 6.4mm
RS Stock No. 167-4420
Mfr. Part No.CG0603MLC-05LE
BrandBourns
PHP4.88
Each (On a Reel of 5000)
units
- - 5V 25V - - MLC - - 0.5pF 1.6mm 0.8mm - 1.6 x 0.8mm
RS Stock No. 170-2868
Mfr. Part No.B72220S0950K101
BrandEPCOS
PHP28.088
Each (On a Reel of 250)
units
150V 95V 125V 250V 100A 50J Standard 21.5mm 6500A 1.83nF - - 4.5mm 21.5 (Dia.) x 4.5mm
RS Stock No. 110-1929
Mfr. Part No.ERZV14D470
BrandPanasonic
PHP10.403
Each (In a Bag of 1000)
units
47V 30V 38V 93V - - ZNR - 2000A 6.75nF - - - 15.5 (Dia.) x 5mm
RS Stock No. 204-2056
Mfr. Part No.B72207S0251K101
BrandEPCOS
PHP27.268
Each (In a Pack of 5)
units
390V 250V 320V 650V 10A 19J Standard 9mm 1200A 105pF - - 4.2mm 9 (Dia.) x 4.2mm
RS Stock No. 240-236
BrandRS PRO
PHP2,513.19
Each
units
- 275V 365V - - 360J High Power - - - 61mm 50mm 40mm 61 x 50 x 40mm
RS Stock No. 106-9876
Mfr. Part No.ERZV07D391
BrandPanasonic
PHP5.712
Each (In a Bag of 1000)
units
390V 250V 320V 650V - - ZNR - 1750A 130pF - - - 8.5 (Dia.) x 5.4mm
RS Stock No. 240-185
BrandRS PRO
PHP1,437.56
Each
units
610V 420V 560V 1050V - 260J High Power 32mm 10000A 1.71nF - - 5.5mm 32 (Dia.) x 5.5mm
RS Stock No. 721-0043
Mfr. Part No.ERZV20D471
BrandPanasonic
PHP118.265
Each (In a Pack of 2)
units
470V 300V 385V 775V 100A - ZNR 21.5mm 10000A 900pF - - - 21.5 (Dia.) x 6.6mm
RS Stock No. 167-8518
Mfr. Part No.B72240B0461K001
BrandEPCOS
PHP1,757.594
Each (In a Box of 10)
units
750V 460V 615V 1240V 300A 1000J HighE - 40000A 1.6nF 60mm 14mm - -
RS Stock No. 289-6831
Mfr. Part No.B72214S0400K101
BrandEPCOS
PHP25.21
Each (In a Pack of 5)
units
68V 40V 56V 135V 10A 13J Standard 15.5mm 1000A 3.55nF - - 4.9mm 15.5 (Dia.) x 4.9mm
RS Stock No. 690-9938
Mfr. Part No.CG0603MLC-05LE
BrandBourns
PHP11.214
Each (In a Pack of 25)
units
- - 5V 25V - - MLC - - 0.5pF 1.6mm 0.8mm - 1.6 x 0.8mm
RS Stock No. 669-4370
Mfr. Part No.820422711
PHP55.80
Each (In a Pack of 5)
units
430V 275V 350V 710V 100A 303J WE-VD 23mm 10000A 860pF - - 5.7mm 23 (Dia.) x 5.7mm
RS Stock No. 204-1974
Mfr. Part No.B72220S0200K101
BrandEPCOS
PHP47.848
Each (In a Pack of 5)
units
33V 20V 26V 65V 20A 18J Standard 21.5mm 2000A 13nF - - 5.1mm 21.5 (Dia.) x 5.1mm
RS Stock No. 289-7250
Mfr. Part No.B72220S0950K101
BrandEPCOS
PHP47.848
Each (In a Pack of 5)
units
150V 95V 125V 250V 100A 50J Standard 21.5mm 6500A 1.83nF - - 4.5mm 21.5 (Dia.) x 4.5mm
RS Stock No. 106-9929
Mfr. Part No.ERZV20D471
BrandPanasonic
PHP44.352
Each (In a Bag of 1000)
units
470V 300V 385V 775V - - ZNR - 10000A 900pF - - - 21.5 (Dia.) x 6.6mm