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. 162-1435
Mfr. Part No.B72214S0500K101
BrandEPCOS
£0.193
Each (On a Reel of 500)
Units
82V 50V 65V 135V 50A 15J Standard 15.5mm 4500A 1.8nF - - 3.9mm 15.5 (Dia.) x 3.9mm
RS Stock No. 170-2885
Mfr. Part No.B72220S0300K101
BrandEPCOS
£0.412
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. 226-7873
Mfr. Part No.ERZV07D330
BrandPanasonic
£0.274
Each (In a Pack of 5)
Units
33V 20V 26V 65V 2.5A 2J ZNR 8.5mm 500A 2.9nF - - 4.9mm 8.5 (Dia.) x 4.9mm
RS Stock No. 170-2884
Mfr. Part No.B72220S0250K101
BrandEPCOS
£0.423
Each (On a Reel of 250)
Units
39V 25V 31V 77V 20A 22J Standard 21.5mm 2000A 11.1nF - - 4.7mm 21.5 (Dia.) x 4.7mm
RS Stock No. 110-1947
Mfr. Part No.ERZV20D180
BrandPanasonic
£0.506
Each (In a Bag of 1000)
Units
18V 11V 14V 36V - - ZNR - 3000A 40nF - - - 21.5 (Dia.) x 5.1mm
RS Stock No. 289-7121
Mfr. Part No.B72214S0500K101
BrandEPCOS
£0.324
Each (In a Pack of 5)
Units
82V 50V 65V 135V 50A 15J Standard 15.5mm 4500A 1.8nF - - 3.9mm 15.5 (Dia.) x 3.9mm
RS Stock No. 106-9916
Mfr. Part No.ERZV20D180
BrandPanasonic
£0.52
Each (In a Bag of 1000)
Units
18V 11V 14V 36V - - ZNR - 3000A 40nF - - - 21.5 (Dia.) x 5.1mm
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. 720-9989
Mfr. Part No.ERZV20D180
BrandPanasonic
£1.09
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. 170-9903
Mfr. Part No.V130LA10AP
BrandLittelfuse
£0.167
Each (In a Bag of 700)
Units
228V 130V 175V 340V 50A 38J LA 17mm 4500A 1nF - - 5.6mm 17 (Dia.) x 5.6mm
RS Stock No. 289-7597
Mfr. Part No.B72220S0300K101
BrandEPCOS
£0.716
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. 289-7575
Mfr. Part No.B72220S0250K101
BrandEPCOS
£0.716
Each (In a Pack of 5)
Units
39V 25V 31V 77V 20A 22J Standard 21.5mm 2000A 11.1nF - - 4.7mm 21.5 (Dia.) x 4.7mm
RS Stock No. 167-6868
Mfr. Part No.VC32M00231KBA
BrandAVX
£1.509
Each (On a Reel of 1000)
Units
360V 230V 300V 595V 10A 20J VC32 - 400A 100pF 8.51mm 5.26mm 2.03mm 8.51 x 5.26 x 2.03mm
RS Stock No. 170-9912
Mfr. Part No.V180ZA1P
BrandLittelfuse
£0.069
Each (In a Bag of 1500)
Units
198V 115V 153V 300V 10A 10J ZA 9mm 1200A 320pF - - 5mm 9 (Dia.) x 5mm
RS Stock No. 543-4997
Mfr. Part No.V180ZA1P
BrandLittelfuse
£0.206
Each (In a Pack of 5)
Units
198V 115V 153V 300V 10A 10J ZA 9mm 1200A 320pF - - 5mm 9 (Dia.) x 5mm
RS Stock No. 785-8758
Mfr. Part No.ERZE07A431
BrandPanasonic
£0.052
Each (In a Pack of 25)
Units
430V 275V 350V 710V 25A 60J ZNR 9mm 2500A 210pF - - 6.5mm 9 x 6.5mm
RS Stock No. 697-9081
Mfr. Part No.VC32M00231KBA
BrandAVX
£2.52
Each
Units
360V 230V 300V 595V 10A 20J VC32 - 400A 100pF 8.51mm 5.26mm 2.03mm 8.51 x 5.26 x 2.03mm
RS Stock No. 289-6825
Mfr. Part No.B72214S0350K101
BrandEPCOS
£0.392
Each (In a Pack of 5)
Units
56V 35V 45V 110V 10A 10J Standard 15.5mm 1000A 4.2nF - - 4.5mm 15.5 (Dia.) x 4.5mm
RS Stock No. 289-7042
Mfr. Part No.B72210S0171K101
BrandEPCOS
£0.402
Each (In a Pack of 5)
Units
270V 175V 225V 455V 25A 28J Standard 12mm 2500A 300pF - - 4.6mm 12 (Dia.) x 4.6mm
RS Stock No. 170-2857
Mfr. Part No.B72214S0350K101
BrandEPCOS
£0.193
Each (On a Reel of 500)
Units
56V 35V 45V 110V 10A 10J Standard 15.5mm 1000A 4.2nF - - 4.5mm 15.5 (Dia.) x 4.5mm
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