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. 543-5300
Mfr. Part No.V510LA40AP
BrandLittelfuse
MYR4.254
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. 289-7597
Mfr. Part No.B72220S0300K101
BrandEPCOS
MYR3.784
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. 170-9924
Mfr. Part No.V510LA40AP
BrandLittelfuse
MYR2.611
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. 878-1738
Mfr. Part No.V321DA40
BrandLittelfuse
MYR163.29
Each
units
561V 320V 420V 830V - - DA - 40000A 3.8nF 62mm - - 62 x 67 x 15mm
RS Stock No. 690-9912
Mfr. Part No.CG0402MLC-05LG
BrandBourns
MYR1.18
Each (In a Pack of 25)
units
- - 5V 25V - - MLC - - 0.5pF 1.6mm 0.8mm - 1.6 x 0.8mm
RS Stock No. 468-150
Mfr. Part No.B72220Q0301K101
BrandEPCOS
MYR6.426
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. 760-6841
Mfr. Part No.V1000LA80AP
BrandLittelfuse
MYR9.64
Each (In a Pack of 5)
units
1425 → 1800V 1000V 1200V 2700V 50A 220J LA 17mm 4500A 130pF - - 10.8mm 17 (Dia.) x 10.8mm
RS Stock No. 110-1903
Mfr. Part No.ERZV07D201
BrandPanasonic
MYR0.458
Each (In a Bag of 1000)
units
200V 130V 170V 340V - - ZNR - 1750A 200pF - - - 8.5 (Dia.) x 4.4mm
RS Stock No. 163-3859
Mfr. Part No.820422711
MYR2.897
Each (On a Reel of 500)
units
430V 275V 350V 710V 100A 303J WE-VD 23mm 10000A 860pF - - 5.7mm 23 (Dia.) x 5.7mm
RS Stock No. 720-9989
Mfr. Part No.ERZV20D180
BrandPanasonic
MYR5.85
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. 289-7187
Mfr. Part No.B72214S0271K101
BrandEPCOS
MYR2.214
Each (In a Pack of 5)
units
430V 275V 350V 710V 50A 71J Standard 15.5mm 4500A 440pF - - 5mm 15.5 (Dia.) x 5mm
RS Stock No. 106-9898
Mfr. Part No.ERZV14D180
BrandPanasonic
MYR0.792
Each (In a Bag of 1000)
units
18V 11V 14V 36V - - ZNR - 2000A 25nF - - - 15.5 (Dia.) x 4.6mm
RS Stock No. 240-135
BrandRS PRO
MYR85.65
Each
units
610V 420V 560V 1050V - 310J High Power 36mm 12000A 2.05nF - - 5.5mm 36 (Dia.) x 5.5mm
RS Stock No. 851-8382
Mfr. Part No.MOV-20D431K
BrandBourns
MYR2.43
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
MYR0.843
Each (In a Bag of 1000)
units
18V 11V 14V 36V - - ZNR - 2000A 25nF - - - 15.5 (Dia.) x 4.6mm
RS Stock No. 669-4370
Mfr. Part No.820422711
MYR4.426
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. 240-157
BrandRS PRO
MYR54.30
Each
units
710V 484V 640V 1200V - 380J High Power 36mm 12000A 1.94nF - - 6mm 36 (Dia.) x 6mm
RS Stock No. 106-9873
Mfr. Part No.ERZV07D201
BrandPanasonic
MYR0.458
Each (In a Bag of 1000)
units
200V 130V 170V 340V - - ZNR - 1750A 200pF - - - 8.5 (Dia.) x 4.4mm
RS Stock No. 851-8335
Mfr. Part No.MOV-14D471K
BrandBourns
MYR2.00
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
MYR0.454
Each (On a Reel of 1000)
units
510V 320V 420V - 1200A 25J StandarD 9mm - 90pF - - 4.8mm 9 (Dia.) x 4.8mm