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. 769-1492
Mfr. Part No.B72205S0301K101
BrandEPCOS
TWD12.80
Each (In a Pack of 10)
units
470V 300V 385V - 400A 9.6J StandarD 7mm - 45pF - - 4.5mm 7 (Dia.) x 4.5mm
RS Stock No. 163-3865
Mfr. Part No.820541311
TWD22.10
Each (On a Reel of 750)
units
200V 130V 170V 340V 50A 57J WE-VD 16.5mm 4500A 840pF - - - -
RS Stock No. 106-9855
Mfr. Part No.ERZV05D180
BrandPanasonic
TWD4.00
Each (In a Bag of 1000)
units
18V 11V 14V 40V - - ZNR - 250A 1.6nF - - - 7 (Dia.) x 4.5mm
RS Stock No. 138-9267
Mfr. Part No.B72214S2131K101
BrandEPCOS
TWD15.60
Each (In a Bag of 20)
units
205V 130Vrms 170V 340V 50A 50J Advanced - 6000A 880pF 15.5mm 18.5mm 4.6mm 15.5 x 4.6 x 18.5mm
RS Stock No. 800-7074
Mfr. Part No.V27ZA1P
BrandLittelfuse
TWD10.50
Each (In a Pack of 25)
units
31.1V 17V 22V 53V 2.5A 1J ZA 9mm 250A 1.875nF - - 5mm 9 (Dia.) x 5mm
RS Stock No. 760-6863
Mfr. Part No.V14E275P
BrandLittelfuse
TWD13.40
Each (In a Pack of 10)
units
387 → 473V 275V 350V 710V 50A 110J E 17mm 6000A 450pF - - 7.3mm 17 (Dia.) x 7.3mm
RS Stock No. 110-1902
Mfr. Part No.ERZV07D820
BrandPanasonic
TWD3.80
Each (In a Bag of 1000)
units
82V 50V 65V 135V - - ZNR - 1750A 810pF - - - 8.5 (Dia.) x 4.1mm
RS Stock No. 876-8177
Mfr. Part No.V12ZA2
BrandLittelfuse
TWD11.10
Each (In a Pack of 50)
units
16V 6V 8V 30V - 1.2J ZA - 250A 6.1nF - - - 12.5 (Dia.) x 16mm
RS Stock No. 171-0001
Mfr. Part No.V275LA10P
BrandLittelfuse
TWD7.30
Each (In a Bag of 1000)
units
473V 275V 369V 710V 25A 45J LA 12.5mm 2500A 200pF - - 5.6mm 12.5 (Dia.) x 5.6mm
RS Stock No. 167-0167
Mfr. Part No.B72530T0060M062
BrandEPCOS
TWD7.20
Each (On a Reel of 3000)
units
11V 6V 8V 25V 2.5A 0.7J CT - 300A 4nF 3.2mm 2.5mm - -
RS Stock No. 138-9287
Mfr. Part No.B72207S0141K101
BrandEPCOS
TWD10.40
Each (In a Bag of 20)
units
220V 140Vrms 180V 360V 10A 10J Standard - 1200A 230pF 9mm 11mm 3.7mm 9 x 3.7 x 11mm
RS Stock No. 669-4412
Mfr. Part No.82550060
TWD22.40
Each (In a Pack of 5)
units
12V 6V 9V 20V 1A 0.1J WE-VS - 80A 1.18nF 2mm 1.25mm - -
New
RS Stock No. 211-1137
Mfr. Part No.ZV25K1210401NIR1
BrandBourns
TWD4.50
Each (On a Reel of 2500)
units
39V 25V 31V 65V 3A - ZV - - 1.06nF - - - -
RS Stock No. 187-6536
Mfr. Part No.VGAH181216P390DP
BrandAVX
TWD34.60
Each (In a Pack of 10)
units
24.5V 11V 16V 40V - 2.9J VGAH - 1000 (Peak Current)A 7nF 4.5mm 3.2mm 2mm 4.5 x 3.2 x 2mm
RS Stock No. 543-5271
Mfr. Part No.V5.5MLA0805AXH
BrandLittelfuse
TWD21.40
Each (In a Pack of 10)
units
9.3V 4V 5.5V 17.5V 1A 0.3J ML - 120A 1.84nF 2.01mm 1.25mm 1.1mm 2.01 x 1.25 x 1.1mm
RS Stock No. 204-8748
Mfr. Part No.PV300K4032R2
BrandBourns
TWD15.10
Each (In a Pack of 10)
units
470 - - 775V 10A - PV - - 150pF - - - -
RS Stock No. 202-0498
Mfr. Part No.B72230M0551M401
BrandEPCOS
TWD14,950.00
1 Tray of 40
Tray(s)
910V - - - - - MT30 - - 900pF - - - -
RS Stock No. 196-7903
Mfr. Part No.8231606A
TWD8.50
Each (On a Reel of 5000)
units
- 4.5V 6V 40V 16A - WE-VE femtoF - - 0.05pF - - - -
RS Stock No. 226-8040
Mfr. Part No.ERZV07D431
BrandPanasonic
TWD12.80
Each (In a Pack of 5)
units
430V 275V 350V 710V 10A 40J ZNR 8.5mm 1750A 120pF - - 5.6mm 8.5 (Dia.) x 5.6mm
RS Stock No. 187-8121
Mfr. Part No.ERZE14A431S1
BrandPanasonic
TWD13.50
Each (In a Bag of 2000)
units
430V 275V 350V 710V 100A 303J E14-S1 16.5mm 7500A 800pF - - 6.4mm 16.5 Dia. x 6.4mm