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. 110-1917
Mfr. Part No.ERZV10D221
BrandPanasonic
TWD5.20
Each (In a Bag of 1000)
units
220V 140V 180V 360V - - ZNR - 3500A 410pF - - - 11.5 (Dia.) x 4.9mm
RS Stock No. 110-1929
Mfr. Part No.ERZV14D470
BrandPanasonic
TWD6.30
Each (In a Bag of 1000)
units
47V 30V 38V 93V - - ZNR - 2000A 6.75nF - - - 15.5 (Dia.) x 5mm
RS Stock No. 467-973
Mfr. Part No.B72220Q0271K101
BrandEPCOS
TWD54.60
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
TWD11.00
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
TWD42.50
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. 769-1965
Mfr. Part No.B72220T2271K101
BrandEPCOS
TWD86.40
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. 439-720
Mfr. Part No.ERZV14D221
BrandPanasonic
TWD15.20
Each (In a Pack of 10)
units
220V 140V 180V 360V 50A 78J - 15.5mm 6000A 740pF - - 4.9mm 15.5 (Dia.) x 4.9mm
RS Stock No. 170-2871
Mfr. Part No.B72220S0231K101
BrandEPCOS
TWD18.80
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
TWD7.40
Each (In a Bag of 1000)
units
220V 140V 180V 360V - - ZNR - 6000A 740pF - - - 15.5 (Dia.) x 4.9mm
RS Stock No. 785-8954
Mfr. Part No.ERZE14A331
BrandPanasonic
TWD21.40
Each (In a Pack of 5)
units
330V 210V 270V 545V 100A 228J ZNR 16.5mm 10000A 900pF - - 5.6mm 16.5 x 5.6mm
RS Stock No. 720-9920
Mfr. Part No.ERZV14D470
BrandPanasonic
TWD14.40
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. 289-7294
Mfr. Part No.B72220S0231K101
BrandEPCOS
TWD32.00
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. 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. 439-603
Mfr. Part No.ERZV10D221
BrandPanasonic
TWD10.40
Each (In a Pack of 10)
units
220V 140V 180V 360V 25A 39J - 11.5mm 3500A 410pF - - 4.9mm 11.5 (Dia.) x 4.9mm
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. 720-9954
Mfr. Part No.ERZV14D221
BrandPanasonic
TWD10.60
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. 106-9887
Mfr. Part No.ERZV10D221
BrandPanasonic
TWD5.20
Each (In a Bag of 1000)
units
220V 140V 180V 360V - - ZNR - 3500A 410pF - - - 11.5 (Dia.) x 4.9mm
RS Stock No. 110-1939
Mfr. Part No.ERZV14D221
BrandPanasonic
TWD7.40
Each (In a Bag of 1000)
units
220V 140V 180V 360V - - ZNR - 6000A 740pF - - - 15.5 (Dia.) x 4.9mm
RS Stock No. 878-1520
Mfr. Part No.TMOV20RP385E
BrandLittelfuse
TWD48.10
Each (In a Pack of 300)
units
682V 385V 505V 1025V - - TMOV - 10000A 700pF - - - 28 (Dia.) x 31mm
RS Stock No. 167-8513
Mfr. Part No.B72240B0321K001
BrandEPCOS
TWD865.70
Each (In a Box of 10)
units
510V 320V 420V 840V 300A 640J HighE - 40000A 2.3nF 60mm 14mm - -