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 Material Series Diameter Maximum Surge Current Capacitance Length Depth Thickness
RS Stock No. 240-157
BrandRS PRO
£8.55
Each
Units
710V 484V 640V 1200V - 380J - High Power 36mm 12000A 1.94nF - - 6mm
RS Stock No. 240-129
BrandRS PRO
£11.11
Each
Units
400V 275V 370V 680V - 215J - High Power 36mm 12000A 2.28nF - - 4mm
RS Stock No. 240-179
BrandRS PRO
£15.18
Each
Units
400V 275V 370V 680V - 180J - High Power 32mm 10000A 1.9nF - - 4mm
RS Stock No. 240-141
BrandRS PRO
£10.59
Each
Units
670V 460V 615V 1140V - 350J - High Power 36mm 12000A 2.05nF - - 6mm
RS Stock No. 240-113
BrandRS PRO
£10.33
Each
Units
360V 250V 330V 620V - 190J - High Power 36mm 12000A 3.085nF - - 4mm
RS Stock No. 901-2692
BrandRS PRO
£0.916
Each (In a Bag of 5)
Units
510V 320V 420V 840V - 136J Metal - 17.5mm 6000A 370pF 22mm - 10.5mm
RS Stock No. 240-236
BrandRS PRO
£35.20
Each
Units
- 275V 365V - - 360J - High Power - - - 61mm 50mm 40mm
RS Stock No. 240-242
BrandRS PRO
£40.34
Each
Units
- 460V 605V - - 500J - High Power - - - 61mm 50mm 40mm
RS Stock No. 240-208
BrandRS PRO
£14.02
Each
Units
710V 484V 640V 1200V - 320J - High Power 32mm 10000A 1.62nF - - 6mm
RS Stock No. 901-2743
BrandRS PRO
£2.65
Each
Units
510V 320V 420V 865V - 528J Metal - 29mm 22000A 1.75nF 29mm 29mm 11.8mm
RS Stock No. 901-2724
BrandRS PRO
£2.88
Each
Units
430V 275V 370V 710V - 370J Metal - 28.5mm 18000A 1.39nF 35.5mm - 9.2mm
RS Stock No. 901-2734
BrandRS PRO
£2.65
Each
Units
430V 275V 370V 710V - 463J Metal - 29mm 22000A 2.13nF 29mm 29mm 11.4mm
RS Stock No. 240-185
BrandRS PRO
£18.13
Each
Units
610V 420V 560V 1050V - 260J - High Power 32mm 10000A 1.71nF - - 5.5mm
RS Stock No. 204-2208
Mfr. Part No.B72220S0271K101
BrandEPCOS
£0.748
Each (In a Pack of 5)
Units
430V 275V 350V 710V 100A 151J Metal B72220 21.5mm 8000A 630pF - 2.3mm 5.4mm
RS Stock No. 240-078
Mfr. Part No.DVS240
£33.50
Each
Units
240V 275V 350V - - 264J Metal DVS - 6500A - 75mm 52.5mm 12.5mm
RS Stock No. 204-1902
Mfr. Part No.B72214S0140K101
BrandEPCOS
£0.354
Each (In a Pack of 5)
Units
22V 14V 18V 43V 10A 4J Metal Standard 15.5mm 1000A 9.95nF 43.5mm 1.5mm 4.2mm
RS Stock No. 289-7064
Mfr. Part No.B72210S0251K101
BrandEPCOS
£0.458
Each (In a Pack of 5)
Units
390V 250V 320V 650V 25A 38J Metal Standard 12mm 2500A 245pF - - 4.8mm
RS Stock No. 170-9914
Mfr. Part No.V275LA40AP
BrandLittelfuse
£0.306
Each (In a Bag of 500)
Units
473V 275V 369V 710V 100A 140J Metal LA 23mm 6500A 900pF 40.5mm - 5.6mm
RS Stock No. 543-5142
Mfr. Part No.V275LA40AP
BrandLittelfuse
£0.722
Each (In a Pack of 5)
Units
473V 275V 369V 710V 100A 140J Metal LA 23mm 6500A 900pF 46.5mm - 5.6mm
RS Stock No. 538-0783
Mfr. Part No.VDRS07H230BSE
£0.35
Each
Units
360V 230V 300V 600V 10A 30J Metal VDR 9mm 1200A 170pF 35mm 4.9mm 6.5mm