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. 170-2888
Mfr. Part No.B72220S0321K101
BrandEPCOS
$0.977
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. 170-9986
Mfr. Part No.V510LA80BP
BrandLittelfuse
$1.35
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. 204-1930
Mfr. Part No.B72214S0300K101
BrandEPCOS
$0.506
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. 289-7317
Mfr. Part No.B72220S0301K101
BrandEPCOS
$1.15
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. 720-9822
Mfr. Part No.ERZV07D201
BrandPanasonic
$0.419
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
RS Stock No. 240-078
Mfr. Part No.DVS240
$67.99
Each
units
240V 275V 350V - - 264J DVS - 6500A - 75mm 52.5mm 12.5mm 75 x 52.5 x 12.5mm
RS Stock No. 170-2863
Mfr. Part No.B72210S0301K101
BrandEPCOS
$0.338
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. 170-9904
Mfr. Part No.V130LA20AP
BrandLittelfuse
$0.831
Each (In a Bag of 500)
units
228V 130V 175V 340V 100A 70J LA 23mm 6500A 1.9nF - - 5.6mm 23 (Dia.) x 5.6mm
RS Stock No. 543-4880
Mfr. Part No.V130LA20AP
BrandLittelfuse
$1.36
Each (In a Pack of 5)
units
228V 130V 175V 340V 100A 70J LA 23mm 6500A 1.9nF - - 5.6mm 23 (Dia.) x 5.6mm
RS Stock No. 170-9924
Mfr. Part No.V510LA40AP
BrandLittelfuse
$0.94
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. 543-5300
Mfr. Part No.V510LA40AP
BrandLittelfuse
$1.61
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
$0.17
Each (In a Bag of 1000)
units
200V 130V 170V 340V - - ZNR - 1750A 200pF - - - 8.5 (Dia.) x 4.4mm
RS Stock No. 106-9873
Mfr. Part No.ERZV07D201
BrandPanasonic
$0.17
Each (In a Bag of 1000)
units
200V 130V 170V 340V - - ZNR - 1750A 200pF - - - 8.5 (Dia.) x 4.4mm
RS Stock No. 289-7070
Mfr. Part No.B72210S0301K101
BrandEPCOS
$0.742
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. 173-9269
Mfr. Part No.MOV-14D431K
BrandBourns
$0.272
Each (In a Bag of 600)
units
430V - 350V 710V 50A 115J MOV-14D 16.5mm - 460pF - - 5.2mm 16.5 (Dia.) x 5.2mm
RS Stock No. 851-8322
Mfr. Part No.MOV-14D431K
BrandBourns
$0.74
Each
units
430V - 350V 710V 50A 115J MOV-14D 16.5mm - 460pF - - 5.2mm 16.5 (Dia.) x 5.2mm
RS Stock No. 769-1543
Mfr. Part No.B72220P3551K101
BrandEPCOS
$2.89
Each (In a Pack of 10)
units
910V 550V 745V - 10000A 490J S20 23mm - 550pF - - 9.8mm 23 (Dia.) x 9.8mm
RS Stock No. 135-8296
Mfr. Part No.B72220P3551K101
BrandEPCOS
$2.25
Each (In a Bag of 100)
units
910V 550V 745V - 10000A 490J S20 23mm - 550pF - - 9.8mm 23 (Dia.) x 9.8mm
RS Stock No. 764-0822
Mfr. Part No.EZJS2VB223
BrandPanasonic
$0.724
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. 204-1924
Mfr. Part No.B72214S0250K101
BrandEPCOS
$0.632
Each (In a Pack of 5)
units
39V 25V 31V 77V 10A 7J Standard 15.5mm 1000A 5.85nF - - 4.2mm 15.5 (Dia.) x 4.2mm
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