SIOV Metal Oxide Varistors

TDK SIOV Metal Oxide Varistors feature a wide operating voltage range of 11 to 1100VRMS. These devices offer high surge current ratings up to 8kA and no derating up to 105°C ambient temperature. The SIOV leaded varistors meet new UL 1449 3rd Edition requirements. TDK SIOV Metal Oxide Varistors applications include lighting, radio and TV equipment, and household appliances.

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Description Datasheet Availability Pricing (GBP) Filter the results in the table by unit price based on your quantity.
Qty. RoHS ECAD Model Series
Product
Mounting Style
Termination Style
Package/Case
Voltage Rating AC
Voltage Rating DC
Varistor Voltage
Clamping Voltage
Diameter
Peak Surge Current
Surge Energy Rating
Capacitance
Minimum Operating Temperature
Maximum Operating Temperature
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Packaging

TDK Varistors 320VAC 10% 20mm StandarD
Datasheet
1,217In Stock
Min.: 1
Mult.: 1
: 4,000

Disc Varistor, StandarD 20mm MOVs PCB Mount Radial 320 VAC 420 VDC 510 V 840 V 21.5 mm 8 kA 184 J 720 pF - 40 C + 105 C Reel, Cut Tape
TDK Varistors 115VAC 10% 20mm StandarD
Datasheet
1,690In Stock
Min.: 1
Mult.: 1

Disc Varistor, StandarD 20mm MOVs PCB Mount Radial 125 VAC 150 VDC 180 V 300 V 20 mm 6.5 kA 60 J 1.52 nF - 40 C + 105 C Bulk

TDK Varistors 14VAC 10% 20mm AEC-Q200
Datasheet
358In Stock
Min.: 1
Mult.: 1

Disc Varistor, Auto-Grade 20mm MOVs PCB Mount Radial 14 VAC 16 VDC 22 V 43 V 23 mm 2 kA 12 J 19 nF - 40 C + 105 C AEC-Q100 Bulk
TDK Varistors 140VAC 10% 20mm StandarD
Datasheet
2,954In Stock
Min.: 1
Mult.: 1

Disc Varistor, StandarD 20mm MOVs PCB Mount Radial 140 VAC 180 VDC 220 V 360 V 20 mm 8 kA 78 J 1.24 nF - 40 C + 105 C Bulk

TDK Varistors 150VAC 10% 20mm StandarD
Datasheet
716In Stock
Min.: 1
Mult.: 1
: 2,000

B722xxS1 MOVs PCB Mount Radial 150 VAC 200 VDC 240 V 395 V 20 mm 8 kA 85 J 1.55 nF - 40 C + 105 C Reel, Cut Tape
TDK Varistors 17VAC 10% 20mm StandarD
Datasheet
1,549In Stock
Min.: 1
Mult.: 1

Disc Varistor, StandarD 20mm MOVs PCB Mount Radial 17 VAC 22 VDC 27 V 53 V 20 mm 2 kA 14 J 15.6 nF - 40 C + 105 C Bulk
TDK Varistors 175VAC 10% 20mm StandarD
Datasheet
3,457In Stock
8,400Expected 05/10/2026
Min.: 1
Mult.: 1

Disc Varistor, StandarD 20mm MOVs PCB Mount Radial 175 VAC 225 VDC 270 V 455 V 20 mm 8 kA 98 J 1 nF - 40 C + 105 C Bulk
TDK Varistors 130VAC 10% 20mm AdvanceD
Datasheet
728In Stock
16,500On Order
Min.: 1
Mult.: 1

Disc Varistor, AdvanceD 20mm MOVs PCB Mount Radial 130 VAC 170 VDC 205 V 340 V 20 mm 10 kA 100 J 1.34 nF - 40 C + 105 C Bulk
TDK Varistors 150VAC 10% 20mm AdvanceD
Datasheet
1,721In Stock
Min.: 1
Mult.: 1

Disc Varistor, AdvanceD 20mm MOVs PCB Mount Radial 150 VAC 200 VDC 240 V 395 V 21.5 mm 1 kA 120 J 1.55 nF - 40 C + 105 C Bulk
TDK Varistors 175VAC 10% 20mm AdvanceD
Datasheet
2,047In Stock
4,131Expected 31/08/2026
Min.: 1
Mult.: 1

Disc Varistor, AdvanceD 20mm MOVs PCB Mount Radial 175 VAC 225 VDC 270 V 455 V 21.5 mm 10 kA 135 J 1 nF - 40 C + 105 C Bulk
TDK Varistors 230VAC 10% 20mm AdvanceD
Datasheet
109In Stock
1,500Expected 04/09/2026
Min.: 1
Mult.: 1

Disc Varistor, AdvanceD 20mm MOVs PCB Mount Radial 230 VAC 300 VDC 360 V 595 V 21.5 mm 10 kA 180 J 760 pF - 40 C + 105 C Bulk
TDK Varistors 250VAC 10% 20mm AdvanceD
Datasheet
406In Stock
3,000Expected 14/09/2026
Min.: 1
Mult.: 1

Disc Varistor, AdvanceD 20mm MOVs PCB Mount Radial 250 VAC 320 VDC 390 V 650 V 21.5 mm 1 kA 195 J 940 pF - 40 C + 105 C Bulk
TDK Varistors 320VAC 10% 20mm AdvanceD
Datasheet
2,959In Stock
Min.: 1
Mult.: 1

Disc Varistor, AdvanceD 20mm MOVs PCB Mount Radial 320 VAC 420 VDC 510 V 840 V 21.5 mm 1 kA 273 J 720 pF - 40 C + 105 C Bulk
TDK Varistors 385VAC 10% 20mm AdvanceD
Datasheet
906In Stock
7,200Expected 06/10/2026
Min.: 1
Mult.: 1

Disc Varistor, AdvanceD 20mm MOVs PCB Mount Radial 385 VAC 505 VDC 620 V 1.025 kV 21.5 mm 10 kA 273 J 600 pF - 40 C + 105 C Bulk
TDK Varistors 460VAC 10% 20mm AdvanceD
Datasheet
1,630In Stock
Min.: 1
Mult.: 1

Disc Varistor, AdvanceD 20mm MOVs PCB Mount Radial 460 VAC 615 VDC 750 V 1.24 kV 21.5 mm 10 kA 300 J 380 pF - 40 C + 105 C Bulk
TDK Varistors 625VAC 10% 20mm AdvanceD
Datasheet
394In Stock
Min.: 1
Mult.: 1

Disc Varistor, AdvanceD 20mm MOVs PCB Mount Radial 625 VAC 825 VDC 1 kV 1.65 kV 21.5 mm 10 kA 400 J 280 pF - 40 C + 105 C Bulk
TDK Varistors 250VAC 10% 20mm SuperioR
Datasheet
749In Stock
Min.: 1
Mult.: 1

Disc Varistor, Multi-Pulse SuperioR 20mm MOVs PCB Mount Radial 250 VAC 320 VDC 390 V 650 V 22.5 mm 12 kA 250 J 700 pF - 40 C + 105 C Bulk
TDK Varistors 300VAC 10% 20mm SuperioR
Datasheet
500In Stock
Min.: 1
Mult.: 1

Disc Varistor, Multi-Pulse SuperioR 20mm MOVs PCB Mount Radial 2220 (5750 metric) 300 VAC 385 VDC 470 V 775 V 22.5 mm 12 kA 320 J 580 pF - 40 C + 105 C Bulk
TDK Varistors 420VAC 10% 20mm StandarD
Datasheet
1,611In Stock
12,000Expected 19/10/2026
Min.: 1
Mult.: 1

Disc Varistor, StandarD 20mm MOVs PCB Mount Radial 420 VAC 560 VDC 680 V 1.12 kV 20 mm 8 kA 175 J 420 pF - 40 C + 105 C Bulk
TDK Varistors 460VAC 10% 20mm StandarD
Datasheet
630In Stock
2,400Expected 08/10/2026
Min.: 1
Mult.: 1

Disc Varistor, StandarD 20mm MOVs PCB Mount Radial 460 VAC 615 VDC 750 V 1.24 kV 20 mm 8 kA 195 J 380 pF - 40 C + 105 C Bulk
TDK Varistors 510VAC 10% 20mm StandarD
Datasheet
1,543In Stock
3,000Expected 07/10/2026
Min.: 1
Mult.: 1

Disc Varistor, StandarD 20mm MOVs PCB Mount Radial 510 VAC 670 VDC 820 V 1.355 kV 20 mm 2.5 kA 190 J 340 pF - 40 C + 105 C Bulk
TDK Varistors 625VAC 10% 20mm StandarD
Datasheet
1,343In Stock
4,800Expected 02/09/2026
Min.: 1
Mult.: 1

Disc Varistor, StandarD 20mm MOVs PCB Mount Radial 625 VAC 825 VDC 1 kV 1.65 kV 20 mm 4.5 kA 230 J 280 pF - 40 C + 105 C Bulk
TDK Varistors 75VAC 10% 20mm StandarD
Datasheet
2,894In Stock
4,200Expected 27/10/2026
Min.: 1
Mult.: 1

Disc Varistor, StandarD 20mm MOVs PCB Mount Radial 75 VAC 100 VDC 120 V 200 V 20 mm 6.5 kA 40 J 2.9 nF - 40 C + 105 C Bulk
TDK Varistors 320VAC 10% 20mm 125 DegC AdvanceD
Datasheet
2,625In Stock
Min.: 1
Mult.: 1

Disc Varistor, AdvanceD 125C, 85C/85%RH 20mm MOVs PCB Mount Radial 320 VAC 420 VDC 510 V 840 V 23.5 mm 10 kA 273 J 720 pF - 40 C + 125 C Bulk
TDK Varistors 550VAC 10% 40mm High E
Datasheet
41In Stock
250Expected 16/11/2026
Min.: 1
Mult.: 1

Disc Varistor, High-Energy 40mm MOVs Chassis Mount Screw 550 VAC 745 VDC 910 V 1.5 kV 40 kA 960 J 1.4 nF - 40 C + 105 C Bulk