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. 162-1430
Mfr. Part No.B72220S0141K101
BrandEPCOS
TWD18.90
Each (On a Reel of 250)
units
220V 140V 180V 360V 100A 78J Standard 21.5mm 8000A 1.24nF - - 4.8mm 21.5 (Dia.) x 4.8mm
RS Stock No. 170-2882
Mfr. Part No.B72220S0140K101
BrandEPCOS
TWD18.90
Each (On a Reel of 250)
units
22V 14V 18V 43V 20A 12J Standard 21.5mm 2000A 19nF - - 4.6mm 21.5 (Dia.) x 4.6mm
RS Stock No. 289-7266
Mfr. Part No.B72220S0141K101
BrandEPCOS
TWD32.20
Each (In a Pack of 5)
units
220V 140V 180V 360V 100A 78J Standard 21.5mm 8000A 1.24nF - - 4.8mm 21.5 (Dia.) x 4.8mm
RS Stock No. 289-7553
Mfr. Part No.B72220S0140K101
BrandEPCOS
TWD32.20
Each (In a Pack of 5)
units
22V 14V 18V 43V 20A 12J Standard 21.5mm 2000A 19nF - - 4.6mm 21.5 (Dia.) x 4.6mm
RS Stock No. 162-0183
Mfr. Part No.B72260B0271K001
BrandEPCOS
TWD2,635.40
Each (In a Box of 10)
units
430V 275V 350V 710V 500A 860J HighE - 70000A 6.6nF 100mm 100mm 24mm 100 x 100 x 24mm
RS Stock No. 813-3593
Mfr. Part No.B72260B0271K001
BrandEPCOS
TWD2,814.00
Each
units
430V 275V 350V 710V 500A 860J HighE - 70000A 6.6nF 100mm 100mm 24mm 100 x 100 x 24mm
RS Stock No. 711-8167
Mfr. Part No.B72214P2421K101
BrandEPCOS
TWD31.60
Each (In a Pack of 5)
units
680V 420V 560V 1120V 50A 190J AdvanceD-MP 16.5mm 6000A 210pF - - 8.2mm 16.5 (Dia.) x 8.2mm
RS Stock No. 170-2897
Mfr. Part No.B72214P2421K101
BrandEPCOS
TWD19.90
Each (On a Reel of 250)
units
- - - - - - - - - - - - - -
RS Stock No. 167-8514
Mfr. Part No.B72240B0381K001
BrandEPCOS
TWD891.70
Each (In a Box of 10)
units
620V 385V 505V 1025V 300A 800J HighE - 40000A 1.9nF 60mm 14mm - -
RS Stock No. 291-3510
Mfr. Part No.B72240B0381K001
BrandEPCOS
TWD964.00
Each
units
620V 385V 505V 1025V 300A 800J HighE - 40000A 1.9nF 60mm 14mm - -
RS Stock No. 170-2871
Mfr. Part No.B72220S0231K101
BrandEPCOS
TWD18.90
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. 170-2913
Mfr. Part No.B72220Q0271K101
BrandEPCOS
TWD34.50
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. 711-8170
Mfr. Part No.B72220P3271K101
BrandEPCOS
TWD49.00
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. 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. 167-8513
Mfr. Part No.B72240B0321K001
BrandEPCOS
TWD891.70
Each (In a Box of 10)
units
510V 320V 420V 840V 300A 640J HighE - 40000A 2.3nF 60mm 14mm - -
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. 289-7294
Mfr. Part No.B72220S0231K101
BrandEPCOS
TWD32.20
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
TWD964.00
Each
units
510V 320V 420V 840V 300A 640J HighE - 40000A 2.3nF 60mm 14mm - -
RS Stock No. 170-2874
Mfr. Part No.B72220S0551K101
BrandEPCOS
TWD35.60
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. 289-7351
Mfr. Part No.B72220S0551K101
BrandEPCOS
TWD56.60
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