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. 170-9908
Mfr. Part No.V150LA10AP
BrandLittelfuse
R 2.784
Each (In a Bag of 700)
units
268V 150V 200V 395V 50A 45J LA 17mm 4500A 800pF - - 5.6mm 17 (Dia.) x 5.6mm
RS stock no. 170-9972
Mfr. Part No.V30MLA1210H
BrandLittelfuse
R 3.096
Each (On a Reel of 2000)
units
35 → 43V 25V 30V 68V 2.5A 1.2J ML - 280A 1.82nF 3.2mm 2.54mm 2.87mm 3.2 x 2.54 x 2.87mm
RS stock no. 181-4389
Mfr. Part No.CG0603MLC-05E
BrandBourns
R 1.485
Each (On a Reel of 5000)
units
5V - 5V 30V - - G0603MLC-05E - - 0.2pF 1.6mm 0.85mm 0.51mm 1.6 x 0.85 x 0.51mm
RS stock no. 240-078
Mfr. Part No.DVS240
R 758.01
Each
units
240V 275V 350V - - 264J DVS - 6500A - 75mm 52.5mm 12.5mm 75 x 52.5 x 12.5mm
RS stock no. 267-8273
Mfr. Part No.B72240B0421K001
BrandEPCOS
R 558.90
Each
units
680V 420V 560V 1120V 300A 910J HighE - 40000A 1.8nF 60mm 14mm - -
RS stock no. 851-8405
Mfr. Part No.MOV-20D681K
BrandBourns
R 12.10
Each
units
680V - 560V 1120V 100A 220J MOV-20D 23mm - 600pF - - 7mm 23 (Dia.) x 7mm
RS stock no. 167-8515
Mfr. Part No.B72240B0421K001
BrandEPCOS
R 536.423
Each (In a Box of 10)
units
680V 420V 560V 1120V 300A 910J HighE - 40000A 1.8nF 60mm 14mm - -
RS stock no. 669-4389
Mfr. Part No.82537040
R 9.78
Each (In a Pack of 5)
units
8V 4V 5.5V 21V 1A 0.04J WE-VS - 20A 220pF 1mm 0.5mm - -
RS stock no. 167-0536
Mfr. Part No.B72650M0251K072
BrandEPCOS
R 6.066
Each (On a Reel of 1000)
units
390V 250Vrms 320V 650V 5A - CU - 400A 55pF 8mm 6.3mm 4.5mm 8 x 6.3 x 4.5mm
RS stock no. 760-7011
Mfr. Part No.V420LA40BP
BrandLittelfuse
R 17.258
Each (In a Pack of 5)
units
610 → 720V 420V 560V 1060V 100A 160J LA 23mm 6500A 600pF - - 7.3mm 23 (Dia.) x 7.3mm
RS stock no. 170-2888
Mfr. Part No.B72220S0321K101
BrandEPCOS
R 7.268
Each (On a Reel of 250)
units
510V 320V 420V 840V 100A 184J Standard 21.5mm 8000A 540pF - - 5.8mm 21.5 (Dia.) x 5.8mm
RS stock no. 163-3880
Mfr. Part No.82537040
R 8.763
Each (On a Reel of 10000)
units
8V 4V 5.5V 21V 1A 0.04J WE-VS - 20A 220pF 1mm 0.5mm - -
RS stock no. 170-9990
Mfr. Part No.V575LA80BP
BrandLittelfuse
R 11.432
Each (In a Bag of 400)
units
805 → 960V 575V 730V 1410V 100A 220J LA 23mm 6500A 450pF - - 8.3mm 23 (Dia.) x 8.3mm
RS stock no. 760-7015
Mfr. Part No.V430CH8T
BrandLittelfuse
R 21.554
Each (In a Pack of 5)
units
389 → 473V 275V 369V 710V 10A 8J CH - 250A 50pF 8.51mm 5.26mm 2.03mm 8.51 x 5.26 x 2.03mm
RS stock no. 181-4489
Mfr. Part No.CG0603MLC-05E
BrandBourns
R 2.412
Each (On a Reel of 250)
units
5V - 5V 30V - - G0603MLC-05E - - 0.2pF 1.6mm 0.85mm 0.51mm 1.6 x 0.85 x 0.51mm
RS stock no. 851-8382
Mfr. Part No.MOV-20D431K
BrandBourns
R 10.80
Each
units
430V - 350V 710V 100A 190J MOV-20D 23mm - 930pF - - 5.6mm 23 (Dia.) x 5.6mm
RS stock no. 785-8913
Mfr. Part No.ERZE11A471
BrandPanasonic
R 5.373
Each (In a Pack of 25)
units
470V 300V 385V 775V 50A 175J ZNR 13mm 6000A 360pF - - 6.6mm 13 x 6.6mm
RS stock no. 170-9981
Mfr. Part No.V430CH8T
BrandLittelfuse
R 10.126
Each (On a Reel of 1000)
units
389 → 473V 275V 369V 710V 10A 8J CH - 250A 50pF 8.51mm 5.26mm 2.03mm 8.51 x 5.26 x 2.03mm
RS stock no. 289-7711
Mfr. Part No.B72220S0321K101
BrandEPCOS
R 15.99
Each (In a Pack of 5)
units
510V 320V 420V 840V 100A 184J Standard 21.5mm 8000A 540pF - - 5.8mm 21.5 (Dia.) x 5.8mm
RS stock no. 289-7610
Mfr. Part No.B72220S0400K101
BrandEPCOS
R 15.99
Each (In a Pack of 5)
units
68V 40V 56V 135V 20A 37J Standard 21.5mm 2000A 6.75nF - - 5.4mm 21.5 (Dia.) x 5.4mm