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. 162-1435
Mfr. Part No.B72214S0500K101
BrandEPCOS
SGD0.35
Each (On a Reel of 500)
units
82V 50V 65V 135V 50A 15J Standard 15.5mm 4500A 1.8nF - - 3.9mm 15.5 (Dia.) x 3.9mm
RS Stock No. 289-7121
Mfr. Part No.B72214S0500K101
BrandEPCOS
SGD0.61
Each (In a Pack of 5)
units
82V 50V 65V 135V 50A 15J Standard 15.5mm 4500A 1.8nF - - 3.9mm 15.5 (Dia.) x 3.9mm
RS Stock No. 170-2869
Mfr. Part No.B72220S0171K101
BrandEPCOS
SGD0.764
Each (On a Reel of 250)
units
270V 175V 225V 455V 100A 98J Standard 21.5mm 8000A 1nF - - 5mm 21.5 (Dia.) x 5mm
RS Stock No. 289-7288
Mfr. Part No.B72220S0171K101
BrandEPCOS
SGD1.292
Each (In a Pack of 5)
units
270V 175V 225V 455V 100A 98J Standard 21.5mm 8000A 1nF - - 5mm 21.5 (Dia.) x 5mm
RS Stock No. 289-7339
Mfr. Part No.B72220S0461K101
BrandEPCOS
SGD1.402
Each (In a Pack of 5)
units
750V 460V 615V 1240V 100A 195J Standard 21.5mm 8000A 380pF - - 6.8mm 21.5 (Dia.) x 6.8mm
RS Stock No. 170-2873
Mfr. Part No.B72220S0461K101
BrandEPCOS
SGD0.998
Each (On a Reel of 200)
units
750V 460V 615V 1240V 100A 195J Standard 21.5mm 8000A 380pF - - 6.8mm 21.5 (Dia.) x 6.8mm
RS Stock No. 291-3526
Mfr. Part No.B72240B0461K001
BrandEPCOS
SGD47.11
Each
units
750V 460V 615V 1240V 300A 1000J HighE - 40000A 1.6nF 60mm 14mm - -
RS Stock No. 167-8518
Mfr. Part No.B72240B0461K001
BrandEPCOS
SGD41.99
Each (In a Box of 10)
units
750V 460V 615V 1240V 300A 1000J HighE - 40000A 1.6nF 60mm 14mm - -
RS Stock No. 289-7610
Mfr. Part No.B72220S0400K101
BrandEPCOS
SGD1.292
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
RS Stock No. 170-2901
Mfr. Part No.B72207S0170K101
BrandEPCOS
SGD0.162
Each (On a Reel of 1000)
units
27V 17V 22V - 250A 1.1J StandarD 9mm 250A 1.9nF - - 3.6mm 9 (Dia.) x 3.6mm
RS Stock No. 204-1974
Mfr. Part No.B72220S0200K101
BrandEPCOS
SGD1.43
Each (In a Pack of 5)
units
33V 20V 26V 65V 20A 18J Standard 21.5mm 2000A 13nF - - 5.1mm 21.5 (Dia.) x 5.1mm
RS Stock No. 289-7250
Mfr. Part No.B72220S0950K101
BrandEPCOS
SGD1.292
Each (In a Pack of 5)
units
150V 95V 125V 250V 100A 50J Standard 21.5mm 6500A 1.83nF - - 4.5mm 21.5 (Dia.) x 4.5mm
RS Stock No. 289-7351
Mfr. Part No.B72220S0551K101
BrandEPCOS
SGD2.27
Each (In a Pack of 5)
units
910V 550V 745V 1500V 100A 210J Standard 21.5mm 6500A 320pF - - 7.5mm 21.5 (Dia.) x 7.5mm
RS Stock No. 170-2852
Mfr. Part No.B72207S0950K101
BrandEPCOS
SGD0.162
Each (On a Reel of 1000)
units
150V 95V 125V 250V 10A 7.6J Standard 9mm 1200A 260pF - - 3.4mm 9 (Dia.) x 3.4mm
RS Stock No. 289-7749
Mfr. Part No.B72210S0321K101
BrandEPCOS
SGD0.80
Each (In a Pack of 5)
units
510V 320V 420V 840V 25A 50J Standard 12mm 2500A 170pF - - 5.4mm 12 (Dia.) x 5.4mm
RS Stock No. 769-2013
Mfr. Part No.B72660M0171K072
BrandEPCOS
SGD1.378
Each (In a Pack of 5)
units
270V 175Vrms 225V 455V 10A - CU - 1200A 150pF 10.2mm 8mm 3.2mm 10.2 x 8 x 3.2mm
RS Stock No. 167-8504
Mfr. Part No.B72240B0271K001
BrandEPCOS
SGD38.49
Each (In a Box of 10)
units
430V 275V 350V 710V 300A 550J HighE - 40000A 2.7nF 60mm 14mm - -
RS Stock No. 289-7626
Mfr. Part No.B72220S0500K101
BrandEPCOS
SGD1.292
Each (In a Pack of 5)
units
82V 50V 65V 135V 100A 27J Standard 21.5mm 6500A 3.8nF - - 4.3mm 21.5 (Dia.) x 4.3mm
RS Stock No. 289-7402
Mfr. Part No.B72205S0200K101
BrandEPCOS
SGD0.582
Each (In a Pack of 5)
units
33V 20V 26V 65V 1A 0.6J Standard 7mm 100A 980pF - - 3.5mm 7 (Dia.) x 3.5mm
RS Stock No. 162-1424
Mfr. Part No.B72220S0400K101
BrandEPCOS
SGD0.809
Each (On a Reel of 250)
units
68V 40V 56V 135V 20A 37J Standard 21.5mm 2000A 6.75nF - - 5.4mm 21.5 (Dia.) x 5.4mm