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. 720-9768
Mfr. Part No.ERZV05D221
BrandPanasonic
£0.245
Each (In a Pack of 10)
Units
220V 140V 180V 380V 5A - ZNR 7mm 800A 110pF - - - 7 (Dia.) x 4.5mm
RS Stock No. 106-9863
Mfr. Part No.ERZV05D221
BrandPanasonic
£0.078
Each (In a Bag of 1000)
Units
220V 140V 180V 380V - - ZNR - 800A 110pF - - - 7 (Dia.) x 4.5mm
RS Stock No. 178-087
Mfr. Part No.VDRS05C275BSE
BrandVishay
£0.198
Each (In a Pack of 5)
Units
430V 275V 350V 695V 5A 12J VDRS - E 7mm 400A 55pF - - 4.9mm 7 (Dia.) x 4.9mm
RS Stock No. 204-2141
Mfr. Part No.B72214S0151K101
BrandEPCOS
£0.388
Each (In a Pack of 5)
Units
240V 150V 200V 395V 50A 40J Standard 15.5mm 4500A 570pF - - 4.4mm 15.5 (Dia.) x 4.4mm
RS Stock No. 543-5209
Mfr. Part No.V33ZA5P
BrandLittelfuse
£0.46
Each (In a Pack of 5)
Units
36.5V 20V 26V 65V 10A 6J ZA 17mm 1000A 9.29nF - - 5mm 17 (Dia.) x 5mm
RS Stock No. 170-9917
Mfr. Part No.V33ZA5P
BrandLittelfuse
£0.176
Each (In a Bag of 700)
Units
36.5V 20V 26V 65V 10A 6J ZA 17mm 1000A 9.29nF - - 5mm 17 (Dia.) x 5mm
RS Stock No. 170-2862
Mfr. Part No.B72210S0151K101
BrandEPCOS
£0.152
Each (On a Reel of 500)
Units
240V 150V 200V 395V 25A 24J Standard 12mm 2500A 350pF - - 4.4mm 12 (Dia.) x 4.4mm
RS Stock No. 289-7244
Mfr. Part No.B72220S0600K101
BrandEPCOS
£0.716
Each (In a Pack of 5)
Units
100V 60V 85V 165V 100A 33J Standard 21.5mm 6500A 3.6nF - - 4.4mm 21.5 (Dia.) x 4.4mm
RS Stock No. 170-2867
Mfr. Part No.B72220S0600K101
BrandEPCOS
£0.442
Each (On a Reel of 250)
Units
100V 60V 85V 165V 100A 33J Standard 21.5mm 6500A 3.6nF - - 4.4mm 21.5 (Dia.) x 4.4mm
RS Stock No. 289-7036
Mfr. Part No.B72210S0151K101
BrandEPCOS
£0.41
Each (In a Pack of 5)
Units
240V 150V 200V 395V 25A 24J Standard 12mm 2500A 350pF - - 4.4mm 12 (Dia.) x 4.4mm
RS Stock No. 252-703
Mfr. Part No.V22ZA3P
BrandLittelfuse
£0.50
Each (In a Pack of 5)
Units
26V 14V 18V 43V 10A 4J VA 17mm 1000A 14.73nF - - 5mm 17 (Dia.) x 5mm
RS Stock No. 769-1492
Mfr. Part No.B72205S0301K101
BrandEPCOS
£0.196
Each (In a Pack of 10)
Units
470V 300V 385V - 400A 9.6J StandarD 7mm - 45pF - - 4.5mm 7 (Dia.) x 4.5mm
RS Stock No. 170-9898
Mfr. Part No.V22ZA3P
BrandLittelfuse
£0.216
Each (In a Bag of 700)
Units
26V 14V 18V 43V 10A 4J VA 17mm 1000A 14.73nF - - 5mm 17 (Dia.) x 5mm
RS Stock No. 170-2824
Mfr. Part No.B72205S0301K101
BrandEPCOS
£0.086
Each (On a Reel of 1000)
Units
470V 300V 385V - 400A 9.6J StandarD 7mm - 45pF - - 4.5mm 7 (Dia.) x 4.5mm
RS Stock No. 289-7272
Mfr. Part No.B72220S0151K101
BrandEPCOS
£0.716
Each (In a Pack of 5)
Units
240V 150V 200V 395V 100A 85J Standard 21.5mm 8000A 1.16nF - - 4.9mm 21.5 (Dia.) x 4.9mm
RS Stock No. 769-1533
Mfr. Part No.B72214P2511K101
BrandEPCOS
£0.785
Each (In a Pack of 10)
Units
820V 510V 670V - 6000A 200J S14 17mm - 300pF - - 8.9mm 17 (Dia.) x 8.9mm
RS Stock No. 170-2908
Mfr. Part No.B72214P2511K101
BrandEPCOS
£0.575
Each (On a Reel of 200)
Units
820V 510V 670V - 6000A 200J S14 17mm - 300pF - - 8.9mm 17 (Dia.) x 8.9mm
RS Stock No. 204-2157
Mfr. Part No.B72214S0251K101
BrandEPCOS
£0.392
Each (In a Pack of 5)
Units
390V 250V 320V 650V 50A 65J Standard 15.5mm 4500A 350pF - - 4.8mm 15.5 (Dia.) x 4.8mm
RS Stock No. 543-4874
Mfr. Part No.V130LA10AP
BrandLittelfuse
£0.594
Each (In a Pack of 5)
Units
228V 130V 175V 340V 50A 38J LA 17mm 4500A 1nF - - 5.6mm 17 (Dia.) x 5.6mm
RS Stock No. 170-9969
Mfr. Part No.V275LA40BP
BrandLittelfuse
£0.353
Each (In a Bag of 500)
Units
389 → 453V 275V 369V 680V 100A 140J LA 23mm 6500A 900pF - - 5.6mm 23 (Dia.) x 5.6mm
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