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. 669-4358
Mfr. Part No.820541406
MYR3.15
Each (In a Pack of 5)
units
22V 14V 18V 43V 10A 5.4J WE-VD 16.5mm 1000A 1.196nF - - 5mm 16.5 (Dia.) x 5mm
RS Stock No. 289-7711
Mfr. Part No.B72220S0321K101
BrandEPCOS
MYR3.392
Each (In a Pack of 5)
units
510V 320V 420V 840V 100A 184J Standard 21.5mm 8000A 540pF - - 5.8mm 21.5 (Dia.) x 5.8mm
RS Stock No. 170-9965
Mfr. Part No.V230LA20AP
BrandLittelfuse
MYR0.779
Each (In a Bag of 700)
units
324 → 396V 230V 300V 595V 50A 70J LA 17mm 4500A 550pF - - 5.6mm 17 (Dia.) x 5.6mm
RS Stock No. 162-1431
Mfr. Part No.B72220Q0301K101
BrandEPCOS
MYR3.887
Each (On a Reel of 250)
units
470V 300V 385V 775V 130A 235J EnergetiQ 22.5mm 15000A 850pF - - 6.1mm 22.5 (Dia.) x 6.1mm
RS Stock No. 468-150
Mfr. Part No.B72220Q0301K101
BrandEPCOS
MYR6.58
Each (In a Pack of 5)
units
470V 300V 385V 775V 130A 235J EnergetiQ 22.5mm 15000A 850pF - - 6.1mm 22.5 (Dia.) x 6.1mm
RS Stock No. 878-2012
Mfr. Part No.V20E300P
BrandLittelfuse
MYR2.621
Each (In a Pack of 50)
units
517V 300V 385V 775V - - UltraMOV - 10000A 800pF - - - 23 (Dia.) x 26.5mm
RS Stock No. 690-9912
Mfr. Part No.CG0402MLC-05LG
BrandBourns
MYR0.707
Each (In a Pack of 25)
units
- - 5V 25V - - MLC - - 0.5pF 1.6mm 0.8mm - 1.6 x 0.8mm
RS Stock No. 170-2888
Mfr. Part No.B72220S0321K101
BrandEPCOS
MYR2.289
Each (On a Reel of 250)
units
510V 320V 420V 840V 100A 184J Standard 21.5mm 8000A 540pF - - 5.8mm 21.5 (Dia.) x 5.8mm
RS Stock No. 543-5300
Mfr. Part No.V510LA40AP
BrandLittelfuse
MYR2.724
Each (In a Pack of 5)
units
910V 510V 675V 1350V 50A 110J LA 17mm 4500A 250pF - - 7.3mm 17 (Dia.) x 7.3mm
RS Stock No. 167-4465
Mfr. Part No.CG0402MLC-05LG
BrandBourns
MYR0.583
Each (On a Reel of 10000)
units
- - 5V 25V - - MLC - - 0.5pF 1.6mm 0.8mm - 1.6 x 0.8mm
RS Stock No. 170-2885
Mfr. Part No.B72220S0300K101
BrandEPCOS
MYR2.27
Each (On a Reel of 250)
units
47V 30V 38V 93V 20A 26J Standard 21.5mm 2000A 9.35nF - - 4.9mm 21.5 (Dia.) x 4.9mm
RS Stock No. 800-7052
Mfr. Part No.V250LA40AP
BrandLittelfuse
MYR2.926
Each (In a Pack of 10)
units
429V 250V 330V 650V 100A 130J LA 23mm 6500A 1nF - - 5.6mm 23 (Dia.) x 5.6mm
RS Stock No. 170-9924
Mfr. Part No.V510LA40AP
BrandLittelfuse
MYR1.17
Each (In a Bag of 500)
units
910V 510V 675V 1350V 50A 110J LA 17mm 4500A 250pF - - 7.3mm 17 (Dia.) x 7.3mm
RS Stock No. 760-6920
Mfr. Part No.V230LA20AP
BrandLittelfuse
MYR2.47
Each (In a Pack of 5)
units
324 → 396V 230V 300V 595V 50A 70J LA 17mm 4500A 550pF - - 5.6mm 17 (Dia.) x 5.6mm
RS Stock No. 163-3866
Mfr. Part No.820541406
MYR2.00
Each (On a Reel of 750)
units
22V 14V 18V 43V 10A 5.4J WE-VD 16.5mm 1000A 1.196nF - - 5mm 16.5 (Dia.) x 5mm
RS Stock No. 170-9999
Mfr. Part No.V250LA40AP
BrandLittelfuse
MYR1.556
Each (In a Bag of 500)
units
429V 250V 330V 650V 100A 130J LA 23mm 6500A 1nF - - 5.6mm 23 (Dia.) x 5.6mm
RS Stock No. 289-7597
Mfr. Part No.B72220S0300K101
BrandEPCOS
MYR3.89
Each (In a Pack of 5)
units
47V 30V 38V 93V 20A 26J Standard 21.5mm 2000A 9.35nF - - 4.9mm 21.5 (Dia.) x 4.9mm
RS Stock No. 878-1738
Mfr. Part No.V321DA40
BrandLittelfuse
MYR237.10
Each
units
561V 320V 420V 830V - - DA - 40000A 3.8nF 62mm - - 62 x 67 x 15mm
RS Stock No. 720-9894
Mfr. Part No.ERZV10D271
BrandPanasonic
MYR1.013
Each (In a Pack of 10)
units
270V 175V 225V 455V 25A - ZNR 11.5mm 3500A 350pF - - - 11.5 (Dia.) x 5.2mm
RS Stock No. 170-9953
Mfr. Part No.V130LA20BP
BrandLittelfuse
MYR1.493
Each (In a Bag of 500)
units
184 → 220V 130V 175V 325V 100A 70J LA 23mm 6500A 1.9nF - - 5.6mm 23 (Dia.) x 5.6mm
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