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. 289-7266
Mfr. Part No.B72220S0141K101
BrandEPCOS
TWD49
Each (In a Pack of 5)
220V 140V 180V 360V 100A 78J Standard 21.5mm 8000A 1.24nF - - 4.8mm 21.5 (Dia.) x 4.8mm
RS Stock No. 393-541
Mfr. Part No.VC32M00301KBA
BrandAVX
TWD81
Each (In a Pack of 5)
470V 300V 385V 775V 10A 23J VC32 - 400A 70pF 8.51mm 5.26mm 2.03mm 8.51 x 5.26 x 2.03mm
RS Stock No. 720-9973
Mfr. Part No.ERZV14D391
BrandPanasonic
TWD16
Each (In a Pack of 5)
390V 250V 320V 650V 50A - ZNR 15.5mm 6000A 500pF - - - 15.5 (Dia.) x 5.8mm
RS Stock No. 720-9737
Mfr. Part No.ERZV05D330
BrandPanasonic
TWD9
Each (In a Pack of 10)
33V 20V 26V 73V 1A 1.1J ZNR 7mm 250A 1.4nF - - 4.5mm 7 (Dia.) x 4.5mm
RS Stock No. 226-8056
Mfr. Part No.ERZV07D471
BrandPanasonic
TWD12
Each (In a Pack of 5)
470V 300V 385V 775V 10A 42J ZNR 8.5mm 1750A 100pF - - 5.8mm 8.5 (Dia.) x 5.8mm
RS Stock No. 813-3593
Mfr. Part No.B72260B0271K001
BrandEPCOS
TWD3,026
Each
430V 275V 350V 710V 500A 860J HighE - 70000A 6.6nF 100mm 100mm 24mm 100 x 100 x 24mm
RS Stock No. 800-7040
Mfr. Part No.V250LA10P
BrandLittelfuse
TWD15
Each (In a Pack of 10)
429V 250V 330V 650V 25A 40J LA 12.5mm 2500A 220pF - - 5.6mm 12.5 (Dia.) x 5.6mm
RS Stock No. 711-8167
Mfr. Part No.B72214P2421K101
BrandEPCOS
TWD31
Each (In a Pack of 5)
680V 420V 560V 1120V 50A 190J AdvanceD-MP 16.5mm 6000A 210pF - - 8.2mm 16.5 (Dia.) x 8.2mm
RS Stock No. 291-3510
Mfr. Part No.B72240B0381K001
BrandEPCOS
TWD999
Each
620V 385V 505V 1025V 300A 800J HighE - 40000A 1.9nF 60mm 14mm - -
RS Stock No. 785-8960
Mfr. Part No.ERZE14A431
BrandPanasonic
TWD22
Each (In a Pack of 5)
430V 275V 350V 710V 100A 303J ZNR 16.5mm 10000A 800pF - - 6.2mm 16.5 x 6.2mm
RS Stock No. 785-8938
Mfr. Part No.ERZE11A911
BrandPanasonic
TWD12
Each (In a Pack of 25)
910V 550V 745V 1500V 50A 255J ZNR 14mm 5000A 240pF - - 9mm 14 x 9mm
RS Stock No. 467-973
Mfr. Part No.B72220Q0271K101
BrandEPCOS
TWD66
Each (In a Pack of 5)
430V 275V 350V 710V 130A 215J EnergetiQ 22.5mm 15000A 930pF - - 5.8mm 22.5 (Dia.) x 5.8mm
RS Stock No. 439-603
Mfr. Part No.ERZV10D221
BrandPanasonic
TWD19
Each (In a Pack of 10)
220V 140V 180V 360V 25A 39J - 11.5mm 3500A 410pF - - 4.9mm 11.5 (Dia.) x 4.9mm
RS Stock No. 785-8954
Mfr. Part No.ERZE14A331
BrandPanasonic
TWD30
Each (In a Pack of 5)
330V 210V 270V 545V 100A 228J ZNR 16.5mm 10000A 900pF - - 5.6mm 16.5 x 5.6mm
RS Stock No. 291-3504
Mfr. Part No.B72240B0321K001
BrandEPCOS
TWD1,050
Each
510V 320V 420V 840V 300A 640J HighE - 40000A 2.3nF 60mm 14mm - -
RS Stock No. 769-1965
Mfr. Part No.B72220T2271K101
BrandEPCOS
TWD86
Each (In a Pack of 5)
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
TWD43
Each (In a Pack of 5)
360V 230V 300V 595V 100A 130J Standard 21.5mm 8000A 760pF - - 5.1mm 21.5 (Dia.) x 5.1mm
RS Stock No. 901-2702
BrandRS Pro
TWD50
Each (In a Bag of 5)
430V 275V 350V 710V - 190J - 23mm 10000A 850pF 26mm - 9.5mm 23 (Dia.) x 9.5mm
RS Stock No. 720-9920
Mfr. Part No.ERZV14D470
BrandPanasonic
TWD14
Each (In a Pack of 5)
47V 30V 38V 93V 10A - ZNR 15.5mm 2000A 6.75nF - - - 15.5 (Dia.) x 5mm
RS Stock No. 878-1520
Mfr. Part No.TMOV20RP385E
BrandLittelfuse
TWD62
Each (In a Pack of 300)
682V 385V 505V 1025V - - TMOV - 10000A 700pF - - - 28 (Dia.) x 31mm