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. 467-977
Mfr. Part No.B72220Q0231K101
BrandEPCOS
R 27.298
Each (In a Pack of 5)
units
360V 230V 300V 595V 130A 180J EnergetiQ 22.5mm 15000A 1.1nF - - 5.5mm 22.5 (Dia.) x 5.5mm
RS stock no. 760-7030
Mfr. Part No.V480LA80BP
BrandLittelfuse
R 17.364
Each (In a Pack of 5)
units
670 → 790V 480V 640V 1160V 100A 180J LA 23mm 6500A 550pF - - 7.3mm 23 (Dia.) x 7.3mm
RS stock no. 800-7071
Mfr. Part No.V275LA4P
BrandLittelfuse
R 4.664
Each (In a Pack of 25)
units
473V 275V 369V 710V 10A 23J LA 9mm 1200A 80pF - - 5.6mm 9 (Dia.) x 5.6mm
RS stock no. 289-6774
Mfr. Part No.B72210S0300K101
BrandEPCOS
R 9.164
Each (In a Pack of 5)
units
47V 30V 38V 93V 5A 4.4J Standard 12mm 500A 2.75nF - - 4.4mm 12 (Dia.) x 4.4mm
RS stock no. 721-0112
Mfr. Part No.ERZVF2M471
BrandPanasonic
R 27.165
Each (In a Pack of 2)
units
470V 300V 385V 775V 10A 10J ZNR - 300A - 8mm 6mm - -
RS stock no. 163-3885
Mfr. Part No.82541250
R 9.326
Each (On a Reel of 4000)
units
39V 25V 30V 72V 1A 1J WE-VS - 200A 620pF 3.2mm 1.6mm - -
RS stock no. 669-4459
Mfr. Part No.82541250
R 13.224
Each (In a Pack of 5)
units
39V 25V 30V 72V 1A 1J WE-VS - 200A 620pF 3.2mm 1.6mm - -
RS stock no. 167-8504
Mfr. Part No.B72240B0271K001
BrandEPCOS
R 463.771
Each (In a Box of 10)
units
430V 275V 350V 710V 300A 550J HighE - 40000A 2.7nF 60mm 14mm - -
RS stock no. 162-1446
Mfr. Part No.B72205S0231K101
BrandEPCOS
R 2.037
Each (On a Reel of 1000)
units
360V 230V 300V 595V 5A 7.2J Standard 7mm 400A 60pF - - 4mm 7 (Dia.) x 4mm
RS stock no. 106-9947
Mfr. Part No.ERZVF2M471
BrandPanasonic
R 11.784
Each (In a Bag of 2000)
units
470V 300V 385V 775V - - ZNR - 300A - 8mm - - -
RS stock no. 171-0003
Mfr. Part No.V275LA4P
BrandLittelfuse
R 1.695
Each (In a Bag of 1500)
units
473V 275V 369V 710V 10A 23J LA 9mm 1200A 80pF - - 5.6mm 9 (Dia.) x 5.6mm
RS stock no. 289-7418
Mfr. Part No.B72205S0250K101
BrandEPCOS
R 6.636
Each (In a Pack of 5)
units
39V 25V 31V 77V 1A 0.7J Standard 7mm 100A 850pF - - 3.6mm 7 (Dia.) x 3.6mm
RS stock no. 204-1980
Mfr. Part No.B72220S0750K101
BrandEPCOS
R 16.042
Each (In a Pack of 5)
units
120V 75V 100V 200V 100A 40J Standard 21.5mm 6500A 2.9nF - - 4.6mm 21.5 (Dia.) x 4.6mm
RS stock no. 106-9916
Mfr. Part No.ERZV20D180
BrandPanasonic
R 11.481
Each (In a Bag of 1000)
units
18V 11V 14V 36V - - ZNR - 3000A 40nF - - - 21.5 (Dia.) x 5.1mm
RS stock no. 289-6768
Mfr. Part No.B72210S00250K101
BrandEPCOS
R 5.134
Each (In a Pack of 5)
units
39V 25V 31V 77V 5A 3.7J Standard 12mm 500A 3.2nF - - 4.2mm 12 (Dia.) x 4.2mm
RS stock no. 170-9987
Mfr. Part No.V5.5MLA1206NH
BrandLittelfuse
R 7.683
Each (On a Reel of 2500)
units
7.1 → 9.3V 4V 5.5V 17.5V 1A 0.4J ML - 150A 3.5nF 3.2mm 1.6mm 1.8mm 3.2 x 1.6 x 1.8mm
RS stock no. 170-2853
Mfr. Part No.B72220S0750K101
BrandEPCOS
R 5.698
Each (On a Reel of 250)
units
120V 75V 100V 200V 100A 40J Standard 21.5mm 6500A 2.9nF - - 4.6mm 21.5 (Dia.) x 4.6mm
RS stock no. 764-0822
Mfr. Part No.EZJS2VB223
BrandPanasonic
R 7.663
Each (In a Pack of 10)
units
12V - 6V - - - EZJS - 25A 22nF 2mm 1.25mm - 2 x 1.25 x 1.25mm
RS stock no. 226-8040
Mfr. Part No.ERZV07D431
BrandPanasonic
R 6.218
Each (In a Pack of 5)
units
430V 275V 350V 710V 10A 40J ZNR 8.5mm 1750A 120pF - - 5.6mm 8.5 (Dia.) x 5.6mm
RS stock no. 170-2877
Mfr. Part No.B72205S0250K101
BrandEPCOS
R 2,270.54
Each (On a Reel of 1000)
units
39V 25V 31V 77V 1A 0.7J Standard 7mm 100A 850pF - - 3.6mm 7 (Dia.) x 3.6mm