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. 240-179
BrandRS PRO
$30.99
Each
units
400V 275V 370V 680V - 180J High Power 32mm 10000A 1.9nF - - 4mm 32 (Dia.) x 4mm
RS Stock No. 240-236
BrandRS PRO
$68.36
Each
units
- 275V 365V - - 360J High Power - - - 61mm 50mm 40mm 61 x 50 x 40mm
RS Stock No. 240-242
BrandRS PRO
$48.31
Each
units
- 460V 605V - - 500J High Power - - - 61mm 50mm 40mm 61 x 50 x 40mm
RS Stock No. 240-185
BrandRS PRO
$35.76
Each
units
610V 420V 560V 1050V - 260J High Power 32mm 10000A 1.71nF - - 5.5mm 32 (Dia.) x 5.5mm
RS Stock No. 240-208
BrandRS PRO
$28.59
Each
units
710V 484V 640V 1200V - 320J High Power 32mm 10000A 1.62nF - - 6mm 32 (Dia.) x 6mm
RS Stock No. 240-113
BrandRS PRO
$21.69
Each
units
360V 250V 330V 620V - 190J High Power 36mm 12000A 3.085nF - - 4mm 36 (Dia.) x 4mm
RS Stock No. 240-129
BrandRS PRO
$22.66
Each
units
400V 275V 370V 680V - 215J High Power 36mm 12000A 2.28nF - - 4mm 36 (Dia.) x 4mm
RS Stock No. 240-141
BrandRS PRO
$21.61
Each
units
670V 460V 615V 1140V - 350J High Power 36mm 12000A 2.05nF - - 6mm 36 (Dia.) x 6mm
RS Stock No. 240-157
BrandRS PRO
$17.43
Each
units
710V 484V 640V 1200V - 380J High Power 36mm 12000A 1.94nF - - 6mm 36 (Dia.) x 6mm
RS Stock No. 204-2208
Mfr. Part No.B72220S0271K101
BrandEPCOS
$1.29
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
$0.75
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
$0.654
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
$1.33
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
$1.432
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
$0.736
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. 170-9986
Mfr. Part No.V510LA80BP
BrandLittelfuse
$1.23
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. 760-7043
Mfr. Part No.V510LA80BP
BrandLittelfuse
$2.132
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. 289-7711
Mfr. Part No.B72220S0321K101
BrandEPCOS
$1.432
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. 316-5964
Mfr. Part No.TNR10V471K
$2.772
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
$0.756
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
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