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. 170-9904
Mfr. Part No.V130LA20AP
BrandLittelfuse
TWD10.60
Each (In a Bag of 500)
units
228V 130V 175V 340V 100A 70J LA 23mm 6500A 1.9nF - - 5.6mm 23 (Dia.) x 5.6mm
RS Stock No. 106-9883
Mfr. Part No.ERZV10D820
BrandPanasonic
TWD4.60
Each (In a Bag of 1000)
units
82V 50V 65V 135V - - ZNR - 3500A 2nF - - - 11.5 (Dia.) x 4.5mm
RS Stock No. 106-9916
Mfr. Part No.ERZV20D180
BrandPanasonic
TWD25.00
Each (In a Bag of 1000)
units
18V 11V 14V 36V - - ZNR - 3000A 40nF - - - 21.5 (Dia.) x 5.1mm
RS Stock No. 170-9966
Mfr. Part No.V24ZA50P
BrandLittelfuse
TWD10.60
Each (In a Bag of 500)
units
19.2 → 26V 14V 18V 43V 20A 100J ZA 23mm 2000A 18nF - - 5mm 23 (Dia.) x 5mm
RS Stock No. 289-7272
Mfr. Part No.B72220S0151K101
BrandEPCOS
TWD24.00
Each (In a Pack of 5)
units
240V 150V 200V 395V 100A 85J Standard 21.5mm 8000A 1.16nF - - 4.9mm 21.5 (Dia.) x 4.9mm
RS Stock No. 170-9981
Mfr. Part No.V430CH8T
BrandLittelfuse
TWD19.70
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. 167-0540
Mfr. Part No.B72660M0250K072
BrandEPCOS
TWD29.30
Each (On a Reel of 1000)
units
39V 25Vrms 31V 77V 2.5A - CU - 250A 1.4nF 10.2mm 8mm 3.2mm 10.2 x 8 x 3.2mm
RS Stock No. 720-9863
Mfr. Part No.ERZV10D820
BrandPanasonic
TWD8.70
Each (In a Pack of 10)
units
82V 50V 65V 135V 25A - ZNR 11.5mm 3500A 2nF - - - 11.5 (Dia.) x 4.5mm
RS Stock No. 760-7015
Mfr. Part No.V430CH8T
BrandLittelfuse
TWD37.00
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. 800-7052
Mfr. Part No.V250LA40AP
BrandLittelfuse
TWD18.00
Each (In a Pack of 10)
units
429V 250V 330V 650V 100A 130J LA 23mm 6500A 1nF - - 5.6mm 23 (Dia.) x 5.6mm
RS Stock No. 707-9797
Mfr. Part No.DVSC275452TT
TWD4,694.00
Each
units
275V 275V 350V - - - DVSC - 45000A - 36mm 72mm 90mm 36 x 72 x 90mm
RS Stock No. 769-2000
Mfr. Part No.B72660M0250K072
BrandEPCOS
TWD34.20
Each (In a Pack of 5)
units
39V 25Vrms 31V 77V 2.5A - CU - 250A 1.4nF 10.2mm 8mm 3.2mm 10.2 x 8 x 3.2mm
RS Stock No. 878-1303
Mfr. Part No.V271DA40
BrandLittelfuse
TWD1,210.80
Each (In a Pack of 12)
units
473V 275V 369V 730V - - DA - 40000A 4.5nF 62mm - - 62 x 67 x 15mm
RS Stock No. 785-8755
Mfr. Part No.ERZE07A391
BrandPanasonic
TWD4.20
Each (In a Pack of 25)
units
390V 250V 320V 650V 25A 53J ZNR 9mm 2500A 240pF - - 6.3mm 9 x 6.3mm
RS Stock No. 878-1722
Mfr. Part No.V131DA40
BrandLittelfuse
TWD1,309.00
Each
units
225.5V 130V 175V 345V - - DA - 40000A 10nF 62mm - - 62 x 67 x 15mm
RS Stock No. 110-1913
Mfr. Part No.ERZV10D820
BrandPanasonic
TWD4.60
Each (In a Bag of 1000)
units
82V 50V 65V 135V - - ZNR - 3500A 2nF - - - 11.5 (Dia.) x 4.5mm
RS Stock No. 110-1943
Mfr. Part No.ERZV14D471
BrandPanasonic
TWD10.20
Each (In a Bag of 1000)
units
470V 300V 385V 775V - - ZNR - 6000A 400pF - - - 15.5 (Dia.) x 6.2mm
RS Stock No. 106-9930
Mfr. Part No.ERZV20D391
BrandPanasonic
TWD28.00
Each (In a Bag of 1000)
units
390V 250V 320V 650V - - ZNR - 10000A 1.1nF - - - 21.5 (Dia.) x 6.2mm
RS Stock No. 316-5964
Mfr. Part No.TNR10V471K
TWD35.40
Each (In a Pack of 5)
units
470V 300V 385V 775V 25A 60J - 11.5mm 3500A 220pF - - 6.2mm 11.5 (Dia.) x 6.2mm
RS Stock No. 720-9970
Mfr. Part No.ERZV14D471
BrandPanasonic
TWD12.80
Each (In a Pack of 5)
units
470V 300V 385V 775V 50A - ZNR 15.5mm 6000A 400pF - - - 15.5 (Dia.) x 6.2mm