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. 110-1945
Mfr. Part No.ERZV14D431
BrandPanasonic
TWD8.50
Each (In a Bag of 1000)
units
430V 275V 350V 710V - - ZNR - 6000A 450pF - - - 15.5 (Dia.) x 6mm
RS Stock No. 187-8152
Mfr. Part No.ERZE14A112SC
BrandPanasonic
TWD42.40
Each (In a Bag of 1000)
units
1100V 680V 895V 1815V 100A 620J E14-S1 17.5mm 7500A 350pF - - 10.1mm 17.5 Dia. x 10.1mm
RS Stock No. 817-3544
Mfr. Part No.ERZHF2M270
BrandPanasonic
TWD33.80
Each (In a Pack of 5)
units
27V - 16V 43V 5A - HF - - - 8mm 6.4mm 4.5mm 8 x 6.4 x 4.5mm
RS Stock No. 134-5698
Mfr. Part No.B72220S0251K101
BrandEPCOS
TWD18.80
Each (In a Bag of 250)
units
390V 250V 320V 650V 100A 140J Standard 21.5mm 8000A 700pF - - 5.3mm 21.5 (Dia.) x 5.3mm
RS Stock No. 204-2191
Mfr. Part No.B72220S0131K101
BrandEPCOS
TWD28.80
Each (In a Pack of 5)
units
205V 130V 170V 340V 100A 74J Standard 21.5mm 8000A 1.34nF - - 4.7mm 21.5 (Dia.) x 4.7mm
RS Stock No. 110-1932
Mfr. Part No.ERZV14D390
BrandPanasonic
TWD6.30
Each (In a Bag of 1000)
units
39V 25V 31V 77V - - ZNR - 2000A 7nF - - - 15.5 (Dia.) x 4.9mm
RS Stock No. 760-6894
Mfr. Part No.V180ZA10P
BrandLittelfuse
TWD20.60
Each (In a Pack of 5)
units
162 → 198V 115V 153V 300V 50A 35J ZA 17mm 4500A 1.19nF - - 5mm 17 (Dia.) x 5mm
RS Stock No. 775-2751
Mfr. Part No.B72510E0250K062
BrandEPCOS
TWD8.10
Each (In a Pack of 100)
units
35.1 → 42.9V 25V 31V 67V 1A 0.3J - - 80A 250pF 2mm 1.25mm - 2 x 1.25 x 1.4mm
RS Stock No. 769-1990
Mfr. Part No.B72650M0251K072
BrandEPCOS
TWD31.60
Each (In a Pack of 5)
units
390V 250Vrms 320V 650V 5A - CU - 400A 55pF 8mm 6.3mm 4.5mm 8 x 6.3 x 4.5mm
RS Stock No. 785-8783
Mfr. Part No.ERZE08A271
BrandPanasonic
TWD5.20
Each (In a Pack of 25)
units
270V 175V 225V 455V 25A 49J ZNR 10.5mm 3500A 330pF - - 5.5mm 10.5 x 5.5mm
RS Stock No. 439-528
Mfr. Part No.ERZV05D390
BrandPanasonic
TWD10.40
Each (In a Pack of 10)
units
39V 25V 31V 86V 1A 1.2J - 7mm 250A 700pF - - 4.5mm 7 (Dia.) x 4.5mm
RS Stock No. 163-3892
Mfr. Part No.82550250
TWD64,360.00
1 Reel of 4000
Reel(s)
39V 25V 30V 65V 1A 0.3J WE-VS - 100A 310pF 2mm 1.25mm - -
RS Stock No. 173-2649
Mfr. Part No.V3.5MLA1206AXH
BrandLittelfuse
TWD27.50
Each (In a Bag of 2500)
units
7V 2.5V 3.5V 13V 1A 0.3J ML - 100A 6nF 3.2mm 1.6mm 1.8mm 3.2 x 1.6 x 1.8mm
RS Stock No. 878-2022
Mfr. Part No.V150LA1P
BrandLittelfuse
TWD7.10
Each (In a Pack of 100)
units
275V 150V 200V 430V - - LA - 1200A 150pF - - - 9 (Dia.) x 12mm
RS Stock No. 669-4370
Mfr. Part No.820422711
TWD33.40
Each (In a Pack of 5)
units
430V 275V 350V 710V 100A 303J WE-VD 23mm 10000A 860pF - - 5.7mm 23 (Dia.) x 5.7mm
RS Stock No. 187-6512
Mfr. Part No.VGAH120616K390DP
BrandAVX
TWD11.70
Each (On a Reel of 1000)
units
24.5V 11V 16V 40V - 0.6J VGAH - 200 (Peak Current)A 1.1nF 3.2mm 1.6mm 1.7mm 3.2 x 1.6 x 1.7mm
RS Stock No. 720-9992
Mfr. Part No.ERZV20D470
BrandPanasonic
TWD52.00
Each (In a Pack of 2)
units
47V 30V 38V 93V 20A - ZNR 21.5mm 3000A 13.5nF - - - 21.5 (Dia.) x 5.6mm
RS Stock No. 187-8305
Mfr. Part No.ERZE14A681SC
BrandPanasonic
TWD30.20
Each (In a Pack of 10)
units
680V 420V 560V 1120V 100A 382J E14-S1 17.5mm 7500A 600pF - - 7.8mm 17.5 Dia. x 7.8mm
RS Stock No. 785-8821
Mfr. Part No.ERZE10A201
BrandPanasonic
TWD6.30
Each (In a Pack of 25)
units
200V 130V 170V 340V 10A 47J ZNR 11.5mm 4500A 630pF - - 5.3mm 11.5 (Dia.) x 5.3mm
RS Stock No. 162-1424
Mfr. Part No.B72220S0400K101
BrandEPCOS
TWD11.70
Each (On a Reel of 250)
units
68V 40V 56V 135V 20A 37J Standard 21.5mm 2000A 6.75nF - - 5.4mm 21.5 (Dia.) x 5.4mm