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. 170-9924
Mfr. Part No.V510LA40AP
BrandLittelfuse
MYR0.975
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. 289-7711
Mfr. Part No.B72220S0321K101
BrandEPCOS
MYR3.23
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. 468-150
Mfr. Part No.B72220Q0301K101
BrandEPCOS
MYR9.498
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. 167-4465
Mfr. Part No.CG0402MLC-05LG
BrandBourns
MYR0.647
Each (On a Reel of 10000)
units
- - 5V 25V - - MLC - - 0.5pF 1.6mm 0.8mm - 1.6 x 0.8mm
RS Stock No. 289-7597
Mfr. Part No.B72220S0300K101
BrandEPCOS
MYR6.76
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. 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. 878-1738
Mfr. Part No.V321DA40
BrandLittelfuse
MYR254.95
Each
units
561V 320V 420V 830V - - DA - 40000A 3.8nF 62mm - - 62 x 67 x 15mm
RS Stock No. 769-1505
Mfr. Part No.B72207S0321K101
BrandEPCOS
MYR1.533
Each (In a Pack of 10)
units
510V 320V 420V - 1200A 25J StandarD 9mm - 90pF - - 4.8mm 9 (Dia.) x 4.8mm
RS Stock No. 162-1435
Mfr. Part No.B72214S0500K101
BrandEPCOS
MYR1.097
Each (On a Reel of 500)
units
82V 50V 65V 135V 50A 15J Standard 15.5mm 4500A 1.8nF - - 3.9mm 15.5 (Dia.) x 3.9mm
RS Stock No. 240-135
BrandRS PRO
MYR60.66
Each
units
610V 420V 560V 1050V - 310J High Power 36mm 12000A 2.05nF - - 5.5mm 36 (Dia.) x 5.5mm
RS Stock No. 167-0545
Mfr. Part No.B72660M0131K072
BrandEPCOS
MYR4.208
Each (On a Reel of 1000)
units
205V 130Vrms 170V 340V 10A - CU - 1200A 200pF 10.2mm 8mm 3.2mm 10.2 x 8 x 3.2mm
RS Stock No. 851-8335
Mfr. Part No.MOV-14D471K
BrandBourns
MYR1.10
Each
units
470V - 385V 775V 50A 125J MOV-14D 16.5mm - 430pF - - 5.4mm 16.5 (Dia.) x 5.4mm
RS Stock No. 170-2902
Mfr. Part No.B72207S0321K101
BrandEPCOS
MYR924.16
1 Reel of 1000
Reel(s)
510V 320V 420V - 1200A 25J StandarD 9mm - 90pF - - 4.8mm 9 (Dia.) x 4.8mm
RS Stock No. 720-9989
Mfr. Part No.ERZV20D180
BrandPanasonic
MYR4.835
Each (In a Pack of 2)
units
18V 11V 14V 36V 20A 13J ZNR 21.5mm 3000A 40nF - - 5.1mm 21.5 (Dia.) x 5.1mm
RS Stock No. 170-9949
Mfr. Part No.V1000LA80AP
BrandLittelfuse
MYR1.884
Each (In a Bag of 300)
units
1425 → 1800V 1000V 1200V 2700V 50A 220J LA 17mm 4500A 130pF - - 10.8mm 17 (Dia.) x 10.8mm
RS Stock No. 439-619
Mfr. Part No.ERZV10D271
BrandPanasonic
MYR1.648
Each (In a Pack of 10)
units
270V 175V 225V 455V 25A 49J - 11.5mm 3500A 350pF - - 5.2mm 11.5 (Dia.) x 5.2mm
RS Stock No. 669-4370
Mfr. Part No.820422711
MYR4.078
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. 851-8382
Mfr. Part No.MOV-20D431K
BrandBourns
MYR1.79
Each
units
430V - 350V 710V 100A 190J MOV-20D 23mm - 930pF - - 5.6mm 23 (Dia.) x 5.6mm
RS Stock No. 110-1928
Mfr. Part No.ERZV14D180
BrandPanasonic
MYR1,040.90
1 Bag of 1000
Bag(s)
18V 11V 14V 36V - - ZNR - 2000A 25nF - - - 15.5 (Dia.) x 4.6mm
RS Stock No. 110-1947
Mfr. Part No.ERZV20D180
BrandPanasonic
MYR3,640.93
1 Bag of 1000
Bag(s)
18V 11V 14V 36V - - ZNR - 3000A 40nF - - - 21.5 (Dia.) x 5.1mm
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