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. 204-2208
Mfr. Part No.B72220S0271K101
BrandEPCOS
£0.304
Each (In a Pack of 5)
Units
430V 275V 350V 710V 100A 151J B72220 21.5mm 8000A 630pF - - 5.4mm 21.5 (Dia.) x 5.4mm
RS Stock No. 204-1902
Mfr. Part No.B72214S0140K101
BrandEPCOS
£0.392
Each (In a Pack of 5)
Units
22V 14V 18V 43V 10A 4J Standard 15.5mm 1000A 9.95nF - - 4.2mm 15.5 (Dia.) x 4.2mm
RS Stock No. 289-7064
Mfr. Part No.B72210S0251K101
BrandEPCOS
£0.402
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. 289-7187
Mfr. Part No.B72214S0271K101
BrandEPCOS
£0.412
Each (In a Pack of 5)
Units
430V 275V 350V 710V 50A 71J Standard 15.5mm 4500A 440pF - - 5mm 15.5 (Dia.) x 5mm
RS Stock No. 266-5390
Mfr. Part No.B72240B0271K001
BrandEPCOS
£20.25
Each
Units
430V 275V 350V 710V 300A 550J HighE - 40000A 2.7nF 60mm 14mm - -
RS Stock No. 167-8504
Mfr. Part No.B72240B0271K001
BrandEPCOS
£20.515
Each (In a Box of 10)
Units
430V 275V 350V 710V 300A 550J HighE - 40000A 2.7nF 60mm 14mm - -
RS Stock No. 289-7301
Mfr. Part No.B72220S0251K101
BrandEPCOS
£0.716
Each (In a Pack of 5)
Units
390V 250V 320V 650V 100A 140J Standard 21.5mm 8000A 700pF - - 5.3mm 21.5 (Dia.) x 5.3mm
RS Stock No. 289-7317
Mfr. Part No.B72220S0301K101
BrandEPCOS
£0.716
Each (In a Pack of 5)
Units
470V 300V 385V 775V 100A 173J Standard 21.5mm 8000A 580pF - - 5.6mm 21.5 (Dia.) x 5.6mm
RS Stock No. 204-1930
Mfr. Part No.B72214S0300K101
BrandEPCOS
£0.412
Each (In a Pack of 5)
Units
47V 30V 38V 30V 10A 9J Standard 15.5mm 1000A 4.95nF - - 4.4mm 15.5 (Dia.) x 4.4mm
RS Stock No. 204-2040
Mfr. Part No.B72207S0151K101
BrandEPCOS
£0.402
Each (In a Pack of 5)
Units
240V 150V 200V 395V 10A 11J Standard 9mm 1200A 170pF - - 3.8mm 9 (Dia.) x 3.8mm
RS Stock No. 204-2214
Mfr. Part No.B72220S0421K101
BrandEPCOS
£0.834
Each (In a Pack of 5)
Units
680V 420V 560V 1120V 100A 175J Standard 21.5mm 8000A 420pF - - 6.5mm 21.5 (Dia.) x 6.5mm
RS Stock No. 204-2062
Mfr. Part No.B72207S0271K101
BrandEPCOS
£0.402
Each (In a Pack of 5)
Units
430V 275V 350V 710V 10A 21J Standard 9mm 1200A 95pF - - 4.4mm 9 (Dia.) x 4.4mm
RS Stock No. 204-1996
Mfr. Part No.B72205S0271K101
BrandEPCOS
£0.294
Each (In a Pack of 5)
Units
430V 275V 350V 710V 5A 8.6J Standard 7mm 400A 50pF - - 4.3mm 7 (Dia.) x 4.3mm
RS Stock No. 204-2141
Mfr. Part No.B72214S0151K101
BrandEPCOS
£0.388
Each (In a Pack of 5)
Units
240V 150V 200V 395V 50A 40J Standard 15.5mm 4500A 570pF - - 4.4mm 15.5 (Dia.) x 4.4mm
RS Stock No. 170-2862
Mfr. Part No.B72210S0151K101
BrandEPCOS
£0.152
Each (On a Reel of 500)
Units
240V 150V 200V 395V 25A 24J Standard 12mm 2500A 350pF - - 4.4mm 12 (Dia.) x 4.4mm
RS Stock No. 289-7036
Mfr. Part No.B72210S0151K101
BrandEPCOS
£0.41
Each (In a Pack of 5)
Units
240V 150V 200V 395V 25A 24J Standard 12mm 2500A 350pF - - 4.4mm 12 (Dia.) x 4.4mm
RS Stock No. 170-2867
Mfr. Part No.B72220S0600K101
BrandEPCOS
£0.442
Each (On a Reel of 250)
Units
100V 60V 85V 165V 100A 33J Standard 21.5mm 6500A 3.6nF - - 4.4mm 21.5 (Dia.) x 4.4mm
RS Stock No. 289-7244
Mfr. Part No.B72220S0600K101
BrandEPCOS
£0.716
Each (In a Pack of 5)
Units
100V 60V 85V 165V 100A 33J Standard 21.5mm 6500A 3.6nF - - 4.4mm 21.5 (Dia.) x 4.4mm
RS Stock No. 769-1492
Mfr. Part No.B72205S0301K101
BrandEPCOS
£0.196
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. 170-2824
Mfr. Part No.B72205S0301K101
BrandEPCOS
£0.086
Each (On a Reel of 1000)
Units
470V 300V 385V - 400A 9.6J StandarD 7mm - 45pF - - 4.5mm 7 (Dia.) x 4.5mm