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. 878-1520
Mfr. Part No.TMOV20RP385E
BrandLittelfuse
TWD48.20
Each (In a Pack of 300)
units
682V 385V 505V 1025V - - TMOV - 10000A 700pF - - - 28 (Dia.) x 31mm
RS Stock No. 291-3504
Mfr. Part No.B72240B0321K001
BrandEPCOS
TWD936.00
Each
units
510V 320V 420V 840V 300A 640J HighE - 40000A 2.3nF 60mm 14mm - -
RS Stock No. 170-2913
Mfr. Part No.B72220Q0271K101
BrandEPCOS
TWD33.50
Each (On a Reel of 250)
units
430V 275V 350V 710V 130A 215J EnergetiQ 22.5mm 15000A 930pF - - 5.8mm 22.5 (Dia.) x 5.8mm
RS Stock No. 720-9920
Mfr. Part No.ERZV14D470
BrandPanasonic
TWD17.00
Each (In a Pack of 5)
units
47V 30V 38V 93V 10A - ZNR 15.5mm 2000A 6.75nF - - - 15.5 (Dia.) x 5mm
RS Stock No. 467-973
Mfr. Part No.B72220Q0271K101
BrandEPCOS
TWD53.60
Each (In a Pack of 5)
units
430V 275V 350V 710V 130A 215J EnergetiQ 22.5mm 15000A 930pF - - 5.8mm 22.5 (Dia.) x 5.8mm
RS Stock No. 720-9881
Mfr. Part No.ERZV10D221
BrandPanasonic
TWD13.50
Each (In a Pack of 10)
units
220V 140V 180V 360V 25A - ZNR 11.5mm 3500A 410pF - - - 11.5 (Dia.) x 4.9mm
RS Stock No. 711-8170
Mfr. Part No.B72220P3271K101
BrandEPCOS
TWD48.00
Each (In a Pack of 2)
units
430V 275V 350V 710V 100A 260J SuperioR-MP 22.5mm 12000A 585pF - - 6.5mm 22.5 (Dia.) x 6.5mm
RS Stock No. 110-1929
Mfr. Part No.ERZV14D470
BrandPanasonic
TWD6.20
Each (In a Bag of 1000)
units
47V 30V 38V 93V - - ZNR - 2000A 6.75nF - - - 15.5 (Dia.) x 5mm
RS Stock No. 106-9899
Mfr. Part No.ERZV14D470
BrandPanasonic
TWD6.00
Each (In a Bag of 1000)
units
47V 30V 38V 93V - - ZNR - 2000A 6.75nF - - - 15.5 (Dia.) x 5mm
RS Stock No. 170-2871
Mfr. Part No.B72220S0231K101
BrandEPCOS
TWD18.50
Each (On a Reel of 250)
units
360V 230V 300V 595V 100A 130J Standard 21.5mm 8000A 760pF - - 5.1mm 21.5 (Dia.) x 5.1mm
RS Stock No. 106-9908
Mfr. Part No.ERZV14D221
BrandPanasonic
TWD6.00
Each (In a Bag of 1000)
units
220V 140V 180V 360V - - ZNR - 6000A 740pF - - - 15.5 (Dia.) x 4.9mm
RS Stock No. 720-9954
Mfr. Part No.ERZV14D221
BrandPanasonic
TWD21.40
Each (In a Pack of 5)
units
220V 140V 180V 360V 50A - ZNR 15.5mm 6000A 740pF - - - 15.5 (Dia.) x 4.9mm
RS Stock No. 769-1965
Mfr. Part No.B72220T2271K101
BrandEPCOS
TWD62.80
Each (In a Pack of 5)
units
430V 275Vrms 350V 710V 100A 215J B72214T - 10000A 630pF 22mm 25.7mm 9.7mm 22 x 25.7 x 9.7mm
RS Stock No. 289-7294
Mfr. Part No.B72220S0231K101
BrandEPCOS
TWD31.60
Each (In a Pack of 5)
units
360V 230V 300V 595V 100A 130J Standard 21.5mm 8000A 760pF - - 5.1mm 21.5 (Dia.) x 5.1mm
RS Stock No. 110-1939
Mfr. Part No.ERZV14D221
BrandPanasonic
TWD6.00
Each (In a Bag of 1000)
units
220V 140V 180V 360V - - ZNR - 6000A 740pF - - - 15.5 (Dia.) x 4.9mm
RS Stock No. 289-7351
Mfr. Part No.B72220S0551K101
BrandEPCOS
TWD61.60
Each (In a Pack of 5)
units
910V 550V 745V 1500V 100A 210J Standard 21.5mm 6500A 320pF - - 7.5mm 21.5 (Dia.) x 7.5mm
RS Stock No. 106-9931
Mfr. Part No.ERZV20D431
BrandPanasonic
TWD29.70
Each (In a Bag of 1000)
units
430V 275V 350V 710V - - ZNR - 10000A - - - - 21.5 (Dia.) x 6.4mm
RS Stock No. 720-9998
Mfr. Part No.ERZV20D390
BrandPanasonic
TWD48.50
Each (In a Pack of 2)
units
39V 25V 31V 77V 20A 28J ZNR 21.5mm 3000A 13.8nF - - 5.5mm 21.5 (Dia.) x 5.5mm
RS Stock No. 170-2874
Mfr. Part No.B72220S0551K101
BrandEPCOS
TWD33.90
Each (On a Reel of 200)
units
910V 550V 745V 1500V 100A 210J Standard 21.5mm 6500A 320pF - - 7.5mm 21.5 (Dia.) x 7.5mm
RS Stock No. 720-9813
Mfr. Part No.ERZV07D151
BrandPanasonic
TWD8.50
Each (In a Pack of 10)
units
150V 95V 125V 250V 10A 13J ZNR 8.5mm 1750A 500pF - - 4.8mm 8.5 (Dia.) x 4.8mm