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. 162-1440
Mfr. Part No.B72220P3381K101
BrandEPCOS
MYR3.62
Each (On a Reel of 250)
units
620V 385V 505V 1025V 100A 320J SuperioR-MP 22.5mm 12000A 445pF - - 8.3mm 22.5 (Dia.) x 8.3mm
RS Stock No. 800-7096
Mfr. Part No.V39ZA6P
BrandLittelfuse
MYR1.846
Each (In a Pack of 10)
units
43V 25V 31V 76V 10A 7.2J ZA 17mm 1000A 7nF - - 5mm 17 (Dia.) x 5mm
RS Stock No. 170-2889
Mfr. Part No.B72210S0321K101
BrandEPCOS
MYR0.818
Each (On a Reel of 500)
units
510V 320V 420V 840V 25A 50J Standard 12mm 2500A 170pF - - 5.4mm 12 (Dia.) x 5.4mm
RS Stock No. 876-7990
Mfr. Part No.V130LA10CP
BrandLittelfuse
MYR3.018
Each (In a Pack of 50)
units
225.5V 130V - 340V - - C-III - 6500A - - - - 17 (Dia.) x 20.5mm
RS Stock No. 785-8960
Mfr. Part No.ERZE14A431
BrandPanasonic
MYR3.61
Each (In a Pack of 5)
units
430V 275V 350V 710V 100A 303J ZNR 16.5mm 10000A 800pF - - 6.2mm 16.5 x 6.2mm
RS Stock No. 204-2084
Mfr. Part No.B72207S0421K101
BrandEPCOS
MYR2.04
Each (In a Pack of 5)
units
680V 420V 560V 1120V 10A 32J Standard 9mm 1200A 65pF - - 5.4mm 9 (Dia.) x 5.4mm
RS Stock No. 669-4308
Mfr. Part No.820552501
MYR2.70
Each (In a Pack of 5)
units
39V 25V 31V 86V 1A 1.2J WE-VD 7.5mm 100A 830pF - - 4.7mm 7.5 (Dia.) x 4.7mm
RS Stock No. 289-7553
Mfr. Part No.B72220S0140K101
BrandEPCOS
MYR3.784
Each (In a Pack of 5)
units
22V 14V 18V 43V 20A 12J Standard 21.5mm 2000A 19nF - - 4.6mm 21.5 (Dia.) x 4.6mm
RS Stock No. 171-0798
Mfr. Part No.V39ZA6P
BrandLittelfuse
MYR1.24
Each (In a Bag of 700)
units
43V 25V 31V 76V 10A 7.2J ZA 17mm 1000A 7nF - - 5mm 17 (Dia.) x 5mm
RS Stock No. 240-141
BrandRS PRO
MYR67.30
Each
units
670V 460V 615V 1140V - 350J High Power 36mm 12000A 2.05nF - - 6mm 36 (Dia.) x 6mm
RS Stock No. 170-2910
Mfr. Part No.B72214P2551K101
BrandEPCOS
MYR3.39
Each (On a Reel of 200)
units
910V 550V 745V - 6000A 220J S14 17mm - 265pF - - 9.4mm 17 (Dia.) x 9.4mm
RS Stock No. 170-9977
Mfr. Part No.V36ZA80P
BrandLittelfuse
MYR1.95
Each (In a Bag of 500)
units
32 → 40V 23V 31V 63V 20A 160J ZA 23mm 2000A 12nF - - 5mm 23 (Dia.) x 5mm
RS Stock No. 226-8056
Mfr. Part No.ERZV07D471
BrandPanasonic
MYR1.64
Each (In a Pack of 5)
units
470V 300V 385V 775V 10A 42J ZNR 8.5mm 1750A 100pF - - 5.8mm 8.5 (Dia.) x 5.8mm
RS Stock No. 289-7064
Mfr. Part No.B72210S0251K101
BrandEPCOS
MYR2.296
Each (In a Pack of 5)
units
390V 250V 320V 650V 25A 38J Standard 12mm 2500A 215pF - - 4.8mm 12 (Dia.) x 4.8mm
RS Stock No. 721-0049
Mfr. Part No.ERZV20D431
BrandPanasonic
MYR7.65
Each (In a Pack of 2)
units
430V 275V 350V 710V 100A - ZNR 21.5mm 10000A - - - - 21.5 (Dia.) x 6.4mm
RS Stock No. 106-9894
Mfr. Part No.ERZV10D431
BrandPanasonic
MYR0.642
Each (In a Bag of 1000)
units
430V 275V 350V 710V - - ZNR - 3500A 270pF - - - 11.5 (Dia.) x 6mm
RS Stock No. 785-8724
Mfr. Part No.ERZE05A471
BrandPanasonic
MYR0.789
Each (In a Pack of 25)
units
470V 300V 385V 775V 10A 32J ZNR 7mm 1200A 100pF - - 6.3mm 7 x 6.3mm
RS Stock No. 720-9888
Mfr. Part No.ERZV10D201
BrandPanasonic
MYR1.33
Each (In a Pack of 10)
units
200V 130V 170V 340V 25A - ZNR 11.5mm 3500A 430pF - - - 11.5 (Dia.) x 4.8mm
RS Stock No. 170-2886
Mfr. Part No.B72220S0500K101
BrandEPCOS
MYR2.234
Each (On a Reel of 250)
units
82V 50V 65V 135V 100A 27J Standard 21.5mm 6500A 3.8nF - - 4.3mm 21.5 (Dia.) x 4.3mm
RS Stock No. 720-9829
Mfr. Part No.ERZV07D271
BrandPanasonic
MYR0.847
Each (In a Pack of 10)
units
270V 175V 225V 455V 10A 24J ZNR 8.5mm 1750A 150pF - - 4.8mm 8.5 (Dia.) x 4.8mm