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SIOV Metal Oxide Varistors

TDK SIOV Metal Oxide Varistors feature a wide operating voltage range of 11 to 1100V_RMS.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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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (GBP) Filter the results in the table by unit price based on your quantity.	Qty.	Series	Product	Mounting Style	Termination Style	Package/Case	Voltage Rating AC	Voltage Rating DC	Varistor Voltage	Clamping Voltage	Diameter	Max Surge Current	Surge Energy Rating	Capacitance	Minimum Operating Temperature	Maximum Operating Temperature	Qualification	Packaging
Varistors 140VAC 10% 20mm StandarD B72220S0141K101 TDK 1: £0.766 2,922In Stock	Mfr. Part No. B72220S0141K101 Mouser Part No 871-B72220S141K101	TDK	Varistors 140VAC 10% 20mm StandarD Learn More about TDK epcosvaristors	Datasheet	2,922In Stock	£0.766 £0.498 £0.41 £0.394 View £0.373 £0.367 £0.346 £0.315	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
Varistors 150VAC 10% 20mm StandarD B72220S151K151 TDK 1: £0.826 716In Stock	Mfr. Part No. B72220S151K151 Mouser Part No 871-B72220S151K151	TDK	Varistors 150VAC 10% 20mm StandarD Learn More about TDK automotive multilayer varistors	Datasheet	716In Stock	Cut Tape £0.826 £0.539 £0.445 £0.426 Reel £0.393 View £0.408 £0.382 £0.378	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
Varistors 17VAC 10% 20mm StandarD B72220S0170K101 TDK 1: £0.766 1,196In Stock	Mfr. Part No. B72220S0170K101 Mouser Part No 871-B72220S170K101	TDK	Varistors 17VAC 10% 20mm StandarD Learn More about TDK epcosvaristors	Datasheet	1,196In Stock	£0.766 £0.498 £0.41 £0.394 View £0.38 £0.361 £0.346 £0.315	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
Varistors 20VAC 10% 20mm StandarD B72220S0200K101 TDK 1: £0.811 2,642In Stock 7,500Expected 28/12/2026	Mfr. Part No. B72220S0200K101 Mouser Part No 871-B72220S200K101	TDK	Varistors 20VAC 10% 20mm StandarD Learn More about TDK epcosvaristors	Datasheet	2,642In Stock 7,500Expected 28/12/2026	£0.811 £0.528 £0.435 £0.416 View £0.386 £0.346 £0.323	Min.: 1 Mult.: 1	Disc Varistor, StandarD 20mm	MOVs	PCB Mount	Radial		20 VAC	26 VDC	33 V	65 V	20 mm	2 kA	18 J	13 nF	- 40 C	+ 105 C		Bulk
Varistors 130VAC 10% 20mm AdvanceD B72220S2131K101 TDK 1: £0.899 1,457In Stock 16,500Expected 11/11/2026	Mfr. Part No. B72220S2131K101 Mouser Part No 871-B72220S2131K101	TDK	Varistors 130VAC 10% 20mm AdvanceD Learn More about TDK epcosvaristors	Datasheet	1,457In Stock 16,500Expected 11/11/2026	£0.899 £0.588 £0.497 £0.335 £0.332	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
Varistors 150VAC 10% 20mm AdvanceD B72220S2151K101 TDK 1: £0.899 1,365In Stock	Mfr. Part No. B72220S2151K101 Mouser Part No 871-B72220S2151K101	TDK	Varistors 150VAC 10% 20mm AdvanceD Learn More about TDK epcosvaristors	Datasheet	1,365In Stock	£0.899 £0.588 £0.487 £0.468 View £0.443 £0.43 £0.416 £0.39	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
Varistors 175VAC 10% 20mm AdvanceD B72220S2171K101 TDK 1: £0.78 2,810In Stock	Mfr. Part No. B72220S2171K101 Mouser Part No 871-B72220S2171K101	TDK	Varistors 175VAC 10% 20mm AdvanceD Learn More about TDK epcosvaristors	Datasheet	2,810In Stock	£0.78 £0.505 £0.416 £0.398 View £0.384 £0.362 £0.354	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
Varistors 230VAC 10% 20mm AdvanceD B72220S2231K101 TDK 1: £0.826 1,599In Stock	Mfr. Part No. B72220S2231K101 Mouser Part No 871-B72220S2231K101	TDK	Varistors 230VAC 10% 20mm AdvanceD Learn More about TDK epcosvaristors	Datasheet	1,599In Stock	£0.826 £0.534 £0.441 £0.422 View £0.408 £0.388 £0.357	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
Varistors 230VAC 10% 20mm StandarD B72220S0231K101 TDK 1: £0.661 3,370In Stock	Mfr. Part No. B72220S0231K101 Mouser Part No 871-B72220S231K101	TDK	Varistors 230VAC 10% 20mm StandarD Learn More about TDK epcosvaristors	Datasheet	3,370In Stock	£0.661 £0.427 £0.35 £0.335 View £0.323 £0.297 £0.293 £0.292	Min.: 1 Mult.: 1	Disc Varistor, StandarD 20mm	MOVs	PCB Mount	Radial		230 VAC	300 VDC	360 V	595 V	20 mm	8 kA	130 J	760 pF	- 40 C	+ 105 C		Bulk
Varistors 385VAC 10% 20mm AdvanceD B72220S2381K101 TDK 1: £0.826 940In Stock 7,200Expected 09/11/2026	Mfr. Part No. B72220S2381K101 Mouser Part No 871-B72220S2381K101	TDK	Varistors 385VAC 10% 20mm AdvanceD Learn More about TDK epcosvaristors	Datasheet	940In Stock 7,200Expected 09/11/2026	£0.826 £0.534 £0.441 £0.422 View £0.385 £0.376 £0.366 £0.337 £0.335	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
Varistors 385VAC 10% 20mm AdvanceD B72220S2381K501 TDK 1: £0.78 1,446In Stock	Mfr. Part No. B72220S2381K501 Mouser Part No 871-B72220S2381K501	TDK	Varistors 385VAC 10% 20mm AdvanceD Learn More about TDK epcosvaristors	Datasheet	1,446In Stock	£0.78 £0.505 £0.416 £0.398 View £0.369 £0.36 £0.355 £0.335	Min.: 1 Mult.: 1	Disc Varistor, AdvanceD 20mm	MOVs	PCB Mount	Radial		380 VAC	505 VDC	620 V	1.025 kV	21.5 mm	10 kA	273 J	600 pF	- 40 C	+ 105 C		Bulk
Varistors 460VAC 10% 20mm AdvanceD B72220S2461K101 TDK 1: £1.01 1,532In Stock 1,600Expected 16/12/2026	Mfr. Part No. B72220S2461K101 Mouser Part No 871-B72220S2461K101	TDK	Varistors 460VAC 10% 20mm AdvanceD Learn More about TDK epcosvaristors	Datasheet	1,532In Stock 1,600Expected 16/12/2026	£1.01 £0.697	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
Varistors 25VAC 10% 20mm StandarD B72220S0250K101 TDK 1: £0.413 2,970In Stock 7,500Expected 16/12/2026	Mfr. Part No. B72220S0250K101 Mouser Part No 871-B72220S250K101	TDK	Varistors 25VAC 10% 20mm StandarD Learn More about TDK epcosvaristors	Datasheet	2,970In Stock 7,500Expected 16/12/2026	£0.413 £0.347 £0.346 £0.315	Min.: 1 Mult.: 1	Disc Varistor, StandarD 20mm	MOVs	PCB Mount	Radial		25 VAC	31 VDC	39 V	77 V	20 mm	2 kA	22 J	11.1 nF	- 40 C	+ 105 C		Bulk
Varistors 250VAC 10% 20mm StandarD B72220S0251K101 TDK 1: £0.661 2,392In Stock 8,400Expected 23/11/2026	Mfr. Part No. B72220S0251K101 Mouser Part No 871-B72220S251K101	TDK	Varistors 250VAC 10% 20mm StandarD Learn More about TDK epcosvaristors	Datasheet	2,392In Stock 8,400Expected 23/11/2026	£0.661 £0.427 £0.35 £0.335 View £0.323 £0.303 £0.293 £0.292 £0.267	Min.: 1 Mult.: 1	Disc Varistor, StandarD 20mm	MOVs	PCB Mount	Radial		250 VAC	320 VDC	390 V	650 V	20 mm	8 kA	140 J	700 pF	- 40 C	+ 105 C		Bulk
Varistors 550VAC 10% 20mm AdvanceD B72220S2551K101 TDK 1: £1.45 600In Stock 14,400On Order	Mfr. Part No. B72220S2551K101 Mouser Part No 871-B72220S2551K101	TDK	Varistors 550VAC 10% 20mm AdvanceD Learn More about TDK epcosvaristors	Datasheet	600In Stock 14,400On Order On Order Ship Dates Mfr. No: B72220S2551K101 Stock: 600 Can Dispatch Immediately On Order: 6,400 Expected 23/11/2026 8,000 Expected 16/12/2026 Factory Lead Time: 10 Weeks	£1.45 £0.969 £0.863 £0.818 View £0.788 £0.739 £0.721 £0.709 £0.644	Min.: 1 Mult.: 1	Disc Varistor, AdvanceD 20mm	MOVs	PCB Mount	Radial		550 VAC	745 VDC	910 V	1.5 kV	21.5 mm	10 kA	360 J	320 pF	- 40 C	+ 105 C		Bulk
Varistors 625VAC 10% 20mm AdvanceD B72220S2621K101 TDK 1: £1.53 339In Stock 2,400Expected 04/01/2027	Mfr. Part No. B72220S2621K101 Mouser Part No 871-B72220S2621K101	TDK	Varistors 625VAC 10% 20mm AdvanceD Learn More about TDK epcosvaristors	Datasheet	339In Stock 2,400Expected 04/01/2027	£1.53 £1.03 £0.917 £0.863 View £0.834 £0.714 £0.709 £0.644	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
Varistors 300VAC 10% 20mm StandarD B72220S0301K101 TDK 1: £0.361 38In Stock 71,400On Order	Mfr. Part No. B72220S0301K101 Mouser Part No 871-B72220S301K101	TDK	Varistors 300VAC 10% 20mm StandarD Learn More about TDK epcosvaristors	Datasheet	38In Stock 71,400On Order On Order Ship Dates Mfr. No: B72220S0301K101 Stock: 38 Can Dispatch Immediately On Order: 29,400 Expected 16/12/2026 42,000 Expected 22/02/2027 Factory Lead Time: 8 Weeks	£0.361 £0.224 £0.18 £0.172 View £0.165 £0.154 £0.149	Min.: 1 Mult.: 1	Disc Varistor, StandarD 20mm	MOVs	PCB Mount	Radial		300 VAC	385 VDC	470 V	775 V	20 mm	8 kA	173 J	580 pF	- 40 C	+ 105 C		Bulk
Varistors 150VAC 10% 20mm SuperioR B72220S3151K101 TDK 1: £1.67 1,377In Stock	Mfr. Part No. B72220S3151K101 Mouser Part No 871-B72220S3151K101	TDK	Varistors 150VAC 10% 20mm SuperioR Learn More about TDK epcosvaristors	Datasheet	1,377In Stock	£1.67 £1.13 £1.00 £0.943 View £0.908 £0.882 £0.788 £0.78 £0.708	Min.: 1 Mult.: 1	Disc Varistor, Multi-Pulse SuperioR 20mm	MOVs	PCB Mount	Radial		150 VAC	200 VDC	240 V	395 V	22.5 mm	12 kA	150 J	1.16 nF	- 40 C	+ 105 C		Bulk
Varistors 250VAC 10% 20mm SuperioR B72220S3251K101 TDK 1: £1.36 249In Stock	Mfr. Part No. B72220S3251K101 Mouser Part No 871-B72220S3251K101	TDK	Varistors 250VAC 10% 20mm SuperioR Learn More about TDK epcosvaristors	Datasheet	249In Stock	£1.36 £1.09 £0.969 £0.917 View £0.818 £0.674 £0.66 £0.658 £0.599	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
Varistors 300VAC 10% 20mm SuperioR B72220S3301K101 TDK 1: £1.36 375In Stock 1,500On Order	Mfr. Part No. B72220S3301K101 Mouser Part No 871-B72220S3301K101	TDK	Varistors 300VAC 10% 20mm SuperioR Learn More about TDK epcosvaristors	Datasheet	375In Stock 1,500On Order	£1.36 £0.908 £0.811 £0.759 View £0.729 £0.675 £0.66 £0.658 £0.599	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
Varistors 320VAC 10% 20mm SuperioR B72220S3321K101 TDK 1: £1.43 108In Stock 3,000Expected 07/12/2026	Mfr. Part No. B72220S3321K101 Mouser Part No 871-B72220S3321K101	TDK	Varistors 320VAC 10% 20mm SuperioR Learn More about TDK epcosvaristors	Datasheet	108In Stock 3,000Expected 07/12/2026	£1.43 £0.96 £0.856 £0.803 View £0.773 £0.688 £0.668 £0.658	Min.: 1 Mult.: 1	Disc Varistor, Multi-Pulse SuperioR 20mm	MOVs	PCB Mount	Radial	2220 (5750 metric)	320 VAC	420 VDC	510 V	840 V	22.5 mm	12 kA	320 J	540 pF	- 40 C	+ 105 C		Bulk
Varistors 460VAC 10% 20mm StandarD B72220S0461K101 TDK 1: £0.917 2,196In Stock 4,800Expected 16/11/2026	Mfr. Part No. B72220S0461K101 Mouser Part No 871-B72220S461K101	TDK	Varistors 460VAC 10% 20mm StandarD Learn More about TDK epcosvaristors	Datasheet	2,196In Stock 4,800Expected 16/11/2026	£0.917 £0.596 £0.498 £0.443 View £0.395 £0.384 £0.383	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
Varistors 510VAC 10% 20mm StandarD B72220S0511K101 TDK 1: £1.31 380In Stock 3,000Expected 09/11/2026	Mfr. Part No. B72220S0511K101 Mouser Part No 871-B72220S511K101	TDK	Varistors 510VAC 10% 20mm StandarD Learn More about TDK epcosvaristors	Datasheet	380In Stock 3,000Expected 09/11/2026	£1.31 £0.871 £0.773 £0.724 View £0.643 £0.601 £0.60 £0.591	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
Varistors 320VAC 10% 20mm 125 DegC AdvanceD B72220U2321K501 TDK 1: £0.882 2,361In Stock 3,000Expected 16/12/2026	Mfr. Part No. B72220U2321K501 Mouser Part No 871-B72220U2321K501	TDK	Varistors 320VAC 10% 20mm 125 DegC AdvanceD Learn More about TDK b722 varistors	Datasheet	2,361In Stock 3,000Expected 16/12/2026	£0.882 £0.574 £0.475 £0.455 View £0.426 £0.407 £0.395	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
Varistors 14VAC 10% 14mm AEC-Q200 B72214S1140K152 TDK 1: £0.943 1,058In Stock	Mfr. Part No. B72214S1140K152 Mouser Part No 871-B72214S1140K152	TDK	Varistors 14VAC 10% 14mm AEC-Q200 Learn More about TDK automotive multilayer varistors	Datasheet	1,058In Stock	Cut Tape £0.943 £0.614 £0.543 £0.509 Reel £0.437 View £0.489 £0.458 £0.443 £0.434	Min.: 1 Mult.: 1 : 4,000	Disc Varistor, Auto-Grade 14mm	MOVs	PCB Mount	Radial		14 VAC	16 VDC	22 V	43 V	17 mm	1 kA	4 J	10 nF	- 40 C	+ 105 C	AEC-Q100	Reel, Cut Tape