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. 204-2208
Mfr. Part No.B72220S0271K101
BrandEPCOS
$1.45
Each (In a Pack of 5)
units
430V 275V 350V 710V 100A 151J B72220 21.5mm 8000A 630pF - - 5.4mm 21.5 (Dia.) x 5.4mm
RS Stock No. 851-8335
Mfr. Part No.MOV-14D471K
BrandBourns
$0.77
Each
units
470V - 385V 775V 50A 125J MOV-14D 16.5mm - 430pF - - 5.4mm 16.5 (Dia.) x 5.4mm
RS Stock No. 170-9914
Mfr. Part No.V275LA40AP
BrandLittelfuse
$0.679
Each (In a Bag of 500)
units
473V 275V 369V 710V 100A 140J LA 23mm 6500A 900pF - - 5.6mm 23 (Dia.) x 5.6mm
RS Stock No. 543-5142
Mfr. Part No.V275LA40AP
BrandLittelfuse
$1.36
Each (In a Pack of 5)
units
473V 275V 369V 710V 100A 140J LA 23mm 6500A 900pF - - 5.6mm 23 (Dia.) x 5.6mm
RS Stock No. 289-7597
Mfr. Part No.B72220S0300K101
BrandEPCOS
$1.474
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. 170-2885
Mfr. Part No.B72220S0300K101
BrandEPCOS
$0.792
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. 760-7043
Mfr. Part No.V510LA80BP
BrandLittelfuse
$2.196
Each (In a Pack of 5)
units
735 → 860V 510V 675V 1280V 100A 190J LA 23mm 6500A 500pF - - 7.3mm 23 (Dia.) x 7.3mm
RS Stock No. 316-5964
Mfr. Part No.TNR10V471K
$2.538
Each (In a Pack of 5)
units
470V 300V 385V 775V 25A 60J - 11.5mm 3500A 220pF - - 6.2mm 11.5 (Dia.) x 6.2mm
RS Stock No. 170-2888
Mfr. Part No.B72220S0321K101
BrandEPCOS
$0.857
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. 289-7711
Mfr. Part No.B72220S0321K101
BrandEPCOS
$1.474
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. 170-9986
Mfr. Part No.V510LA80BP
BrandLittelfuse
$1.323
Each (In a Bag of 400)
units
735 → 860V 510V 675V 1280V 100A 190J LA 23mm 6500A 500pF - - 7.3mm 23 (Dia.) x 7.3mm
RS Stock No. 240-179
BrandRS PRO
$33.19
Each
units
400V 275V 370V 680V - 180J High Power 32mm 10000A 1.9nF - - 4mm 32 (Dia.) x 4mm
RS Stock No. 289-7317
Mfr. Part No.B72220S0301K101
BrandEPCOS
$1.45
Each (In a Pack of 5)
units
470V 300V 385V 775V 100A 173J Standard 21.5mm 8000A 580pF - - 5.6mm 21.5 (Dia.) x 5.6mm
RS Stock No. 204-1930
Mfr. Part No.B72214S0300K101
BrandEPCOS
$0.842
Each (In a Pack of 5)
units
47V 30V 38V 30V 10A 9J Standard 15.5mm 1000A 4.95nF - - 4.4mm 15.5 (Dia.) x 4.4mm
RS Stock No. 170-2863
Mfr. Part No.B72210S0301K101
BrandEPCOS
$0.283
Each (On a Reel of 500)
units
470V 300V 385V 775V 25A 47J Standard 12mm 2500A 180pF - - 5.1mm 12 (Dia.) x 5.1mm
RS Stock No. 289-7070
Mfr. Part No.B72210S0301K101
BrandEPCOS
$0.856
Each (In a Pack of 5)
units
470V 300V 385V 775V 25A 47J Standard 12mm 2500A 180pF - - 5.1mm 12 (Dia.) x 5.1mm
RS Stock No. 240-078
Mfr. Part No.DVS240
$75.01
Each
units
240V 275V 350V - - 264J DVS - 6500A - 75mm 52.5mm 12.5mm 75 x 52.5 x 12.5mm
RS Stock No. 543-5300
Mfr. Part No.V510LA40AP
BrandLittelfuse
$1.62
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. 110-1903
Mfr. Part No.ERZV07D201
BrandPanasonic
$0.161
Each (In a Bag of 1000)
units
200V 130V 170V 340V - - ZNR - 1750A 200pF - - - 8.5 (Dia.) x 4.4mm
RS Stock No. 720-9822
Mfr. Part No.ERZV07D201
BrandPanasonic
$0.384
Each (In a Pack of 10)
units
200V 130V 170V 340V 10A 17.5J ZNR 8.5mm 1750A 200pF - - 4.4mm 8.5 (Dia.) x 4.4mm