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ThermoFuse™ Varistors

TDK ThermoFuse™ Varistors feature a wide operating voltage range of 130V_RMS to 750V_RMS. These varistors are self-protected under abnormal overvoltage conditions and offer high-energy Advanced series E2. TDK ThermoFuse varistors include either leaded square varistor elements or leaded round varistor elements. These varistors are made of epoxy molding and are flame-retardant as per UL 94 V-0. The ThermoFuse varistors come with tinned copper wire and metal compound wire terminals. Typical applications include power meters, telecom, transient voltage surger suppressors (TVSS), and household appliances.

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (USD) Filter the results in the table by unit price based on your quantity.	Qty.
Varistors 385VAC 10% 20mm AdvanceD Thermofused B72220T2381K105 TDK 1: $2.85 500In Stock	Mfr. Part No. B72220T2381K105 Mouser Part No 871-B72220T2381K105	TDK	Varistors 385VAC 10% 20mm AdvanceD Thermofused Learn More about TDK epcos t varistor	Datasheet	500In Stock	$2.85 $2.11 $1.92 $1.72 View $1.62 $1.47 $1.23 $1.21 $1.18	Min.: 1 Mult.: 1
Industrial Surge Protectors 550V 25kA 10% 4pin 30mm B72230M0551M401 TDK 1: $13.10 346In Stock	Mfr. Part No. B72230M0551M401 Mouser Part No 871-B72230M0551M401	TDK	Industrial Surge Protectors 550V 25kA 10% 4pin 30mm Learn More about TDK mt30 thermofuse varistors	Datasheet	346In Stock	$13.10 $9.68 $9.38 $8.73 View $7.86 $7.77	Min.: 1 Mult.: 1
Varistors 510VAC 10% 20mm AdvanceD Thermofused B72220T2511K105 TDK 1: $3.94 1,534In Stock	Mfr. Part No. B72220T2511K105 Mouser Part No 871-B72220T2511K105	TDK	Varistors 510VAC 10% 20mm AdvanceD Thermofused Learn More about TDK epcos t varistor	Datasheet	1,534In Stock	$3.94 $2.49 $2.28 $1.94 View $1.82 $1.60 $1.32 $1.29	Min.: 1 Mult.: 1
Varistors 150V 14mm 2pin ThermoFuse Varistor B72214R2151K101 TDK 1: $1.90 438In Stock	Mfr. Part No. B72214R2151K101 Mouser Part No 871-B72214R2151K101	TDK	Varistors 150V 14mm 2pin ThermoFuse Varistor Learn More about TDK epcos nt thermofuse varistors	Datasheet	438In Stock	$1.90 $1.40 $1.27 $1.13 View $1.07 $1.03 $0.961 $0.95 $0.863	Min.: 1 Mult.: 1
Varistors 275V 14mm 2pin ThermoFuse Varistor B72214R2271K101 TDK 1: $1.64 501In Stock	Mfr. Part No. B72214R2271K101 Mouser Part No 871-B72214R2271K101	TDK	Varistors 275V 14mm 2pin ThermoFuse Varistor Learn More about TDK epcos nt thermofuse varistors	Datasheet	501In Stock	$1.64 $1.20 $1.09 $0.965 View $0.907 $0.872 $0.822 $0.807 $0.78	Min.: 1 Mult.: 1
Varistors 175VAC 10% 14mm AdvanceD Thermofused B72214T2171K105 TDK 1: $1.83 385In Stock	Mfr. Part No. B72214T2171K105 Mouser Part No 871-B72214T2171K105	TDK	Varistors 175VAC 10% 14mm AdvanceD Thermofused Learn More about TDK epcos t varistor	Datasheet	385In Stock	$1.83 $1.35 $1.23 $1.09 View $1.03 $0.986 $0.914 $0.907 $0.896	Min.: 1 Mult.: 1
Varistors 300VAC 10% 20mm 2-pin ThermoFuse B72220R2301K101 TDK 1: $2.01 941In Stock	Mfr. Part No. B72220R2301K101 Mouser Part No 871-B72220R2301K101	TDK	Varistors 300VAC 10% 20mm 2-pin ThermoFuse Learn More about TDK epcos nt thermofuse varistors	Datasheet	941In Stock	$2.01 $1.49 $1.35 $1.23 View $1.03 $0.99	Min.: 1 Mult.: 1
Varistors 320VAC 10% 20mm 2-pin ThermoFuse B72220R2321K101 TDK 1: $2.01 664In Stock	Mfr. Part No. B72220R2321K101 Mouser Part No 871-B72220R2321K101	TDK	Varistors 320VAC 10% 20mm 2-pin ThermoFuse Learn More about TDK epcos nt thermofuse varistors	Datasheet	664In Stock	$2.01 $1.49 $1.35 $1.21 View $1.14 $1.00 $0.99 $0.937	Min.: 1 Mult.: 1
Varistors 320VAC 10% 20mm AdvanceD Thermofused B72220T2321K105 TDK 1: $2.37 652In Stock	Mfr. Part No. B72220T2321K105 Mouser Part No 871-B72220T2321K105	TDK	Varistors 320VAC 10% 20mm AdvanceD Thermofused Learn More about TDK epcos t varistor	Datasheet	652In Stock	$2.37 $1.76 $1.60 $1.44 View $1.35 $1.31 $1.23 $1.22 $1.21	Min.: 1 Mult.: 1
Varistors 130VAC 10% 20mm 3-pin ThermoFuse B72220W2131K101 TDK 1: $2.19 580In Stock	Mfr. Part No. B72220W2131K101 Mouser Part No 871-B72220W2131K101	TDK	Varistors 130VAC 10% 20mm 3-pin ThermoFuse Learn More about TDK epcos nt thermofuse varistors	Datasheet	580In Stock	$2.19 $1.62 $1.48 $1.29 View $1.28 $1.22 $1.14 $1.13	Min.: 1 Mult.: 1
Varistors 275VAC 10% 20mm 3-pin ThermoFuse B72220W2271K101 TDK 1: $2.52 570In Stock	Mfr. Part No. B72220W2271K101 Mouser Part No 871-B72220W2271K101	TDK	Varistors 275VAC 10% 20mm 3-pin ThermoFuse Learn More about TDK epcos nt thermofuse varistors	Datasheet	570In Stock	$2.52 $1.86 $1.70 $1.52 View $1.43 $1.29 $1.09 $1.06 $1.04	Min.: 1 Mult.: 1
Industrial Surge Protectors 510V 25kA 10% 4pin 30mm B72230M0511M401 TDK 1: $14.16 58In Stock	Mfr. Part No. B72230M0511M401 Mouser Part No 871-B72230M0511M401	TDK	Industrial Surge Protectors 510V 25kA 10% 4pin 30mm Learn More about TDK mt30 thermofuse varistors	Datasheet	58In Stock	$14.16 $10.74 $9.56 $8.06 View $7.86 $7.77	Min.: 1 Mult.: 1
Varistors 300V 14mm 2pin ThermoFuse Varistor B72214R2301K101 TDK 1: $1.64 1,000Expected 14/12/2026	Mfr. Part No. B72214R2301K101 Mouser Part No 871-B72214R2301K101	TDK	Varistors 300V 14mm 2pin ThermoFuse Varistor Learn More about TDK epcos nt thermofuse varistors	Datasheet	1,000Expected 14/12/2026	$1.64 $1.20 $1.09 $0.965 View $0.907 $0.872 $0.823 $0.807 $0.74	Min.: 1 Mult.: 1
Varistors 275VAC 10% 20mm 2-pin ThermoFuse B72220R2271K101 TDK 1: $2.13 740Expected 26/10/2026	Mfr. Part No. B72220R2271K101 Mouser Part No 871-B72220R2271K101	TDK	Varistors 275VAC 10% 20mm 2-pin ThermoFuse Learn More about TDK epcos nt thermofuse varistors	Datasheet	740Expected 26/10/2026	$2.13 $1.58 $1.43 $1.28 View $1.21 $1.14 $1.04 $0.99 $0.962	Min.: 1 Mult.: 1
Varistors 50VAC 10% 20mm ThermoFuse B72220T0500K101 TDK 1,500: $1.85 Non-Stocked Lead-Time 8 Weeks	Mfr. Part No. B72220T0500K101 Mouser Part No 871-B72220T0500K101	TDK	Varistors 50VAC 10% 20mm ThermoFuse Learn More about TDK epcos t varistor	Datasheet	Non-Stocked Lead-Time 8 Weeks	$1.85 $1.84	Min.: 1,500 Mult.: 1,500
Varistors 320V 14mm 2pin ThermoFuse Varistor B72214R2321K101 TDK 1,000: $0.824 Non-Stocked Lead-Time 22 Weeks	Mfr. Part No. B72214R2321K101 Mouser Part No 871-B72214R2321K101	TDK	Varistors 320V 14mm 2pin ThermoFuse Varistor Learn More about TDK epcos nt thermofuse varistors	Datasheet	Non-Stocked Lead-Time 22 Weeks	$0.824 $0.807 $0.746	Min.: 1,000 Mult.: 1,000
Varistors 150VAC 10% 14mm AdvanceD Thermofused B72214T2151K105 TDK 1,960: $1.13 Non-Stocked Lead-Time 22 Weeks	Mfr. Part No. B72214T2151K105 Mouser Part No 871-B72214T2151K105	TDK	Varistors 150VAC 10% 14mm AdvanceD Thermofused Learn More about TDK epcos t varistor	Datasheet	Non-Stocked Lead-Time 22 Weeks	$1.13 $1.12	Min.: 1,960 Mult.: 1,960
Varistors 175VAC 10% 14mm AdvanceD Thermofused B72214T2171K106 TDK 1,960: $0.909 Non-Stocked Lead-Time 22 Weeks	Mfr. Part No. B72214T2171K106 Mouser Part No 871-B72214T2171K106	TDK	Varistors 175VAC 10% 14mm AdvanceD Thermofused Learn More about TDK epcos t varistor	Datasheet	Non-Stocked Lead-Time 22 Weeks	$0.909 $0.894	Min.: 1,960 Mult.: 1,960
Varistors 300VAC 10% 14mm AdvanceD Thermofused B72214T2301K106 TDK 1: $2.82 Non-Stocked Lead-Time 22 Weeks	Mfr. Part No. B72214T2301K106 Mouser Part No 871-B72214T2301K106	TDK	Varistors 300VAC 10% 14mm AdvanceD Thermofused Learn More about TDK epcos t varistor	Datasheet	Non-Stocked Lead-Time 22 Weeks	$2.82 $1.78 $1.58 $1.35 View $1.26 $1.11 $0.914 $0.90 $0.891	Min.: 1 Mult.: 1
Varistors 300VAC 10% 14mm AdvanceD Thermofused B72214T2301K108 TDK 1,680: $0.909 Non-Stocked Lead-Time 22 Weeks	Mfr. Part No. B72214T2301K108 Mouser Part No 871-B72214T2301K108	TDK	Varistors 300VAC 10% 14mm AdvanceD Thermofused Learn More about TDK epcos t varistor	Datasheet	Non-Stocked Lead-Time 22 Weeks	$0.909 $0.894	Min.: 1,680 Mult.: 1,680
Varistors 320VAC 10% 14mm AdvanceD Thermofused B72214T2321K106 TDK 1,960: $0.704 Non-Stocked Lead-Time 22 Weeks	Mfr. Part No. B72214T2321K106 Mouser Part No 871-B72214T2321K106	TDK	Varistors 320VAC 10% 14mm AdvanceD Thermofused Learn More about TDK epcos t varistor	Datasheet	Non-Stocked Lead-Time 22 Weeks	$0.704 $0.688	Min.: 1,960 Mult.: 1,960
Varistors 320VAC 10% 14mm 3-pin ThermoFuse B72214W2321K101 TDK 1: $1.82 Non-Stocked Lead-Time 22 Weeks	Mfr. Part No. B72214W2321K101 Mouser Part No 871-B72214W2321K101	TDK	Varistors 320VAC 10% 14mm 3-pin ThermoFuse Learn More about TDK epcos nt thermofuse varistors	Datasheet	Non-Stocked Lead-Time 22 Weeks	$1.82 $1.33 $1.21 $1.08 View $1.01 $0.972 $0.90 $0.84	Min.: 1 Mult.: 1
Varistors 380VAC 10% 14mm 3-pin ThermoFuse B72214W2381K101 TDK 1: $1.71 Non-Stocked Lead-Time 22 Weeks	Mfr. Part No. B72214W2381K101 Mouser Part No 871-B72214W2381K101	TDK	Varistors 380VAC 10% 14mm 3-pin ThermoFuse Learn More about TDK epcos nt thermofuse varistors	Datasheet	Non-Stocked Lead-Time 22 Weeks	$1.71 $1.26 $1.14 $1.02 View $0.952 $0.916 $0.848 $0.84 $0.76	Min.: 1 Mult.: 1
Varistors 130VAC 10% 20mm 2-pin ThermoFuse B72220R2131K101 TDK 750: $1.22 Non-Stocked Lead-Time 22 Weeks	Mfr. Part No. B72220R2131K101 Mouser Part No 871-B72220R2131K101	TDK	Varistors 130VAC 10% 20mm 2-pin ThermoFuse Learn More about TDK epcos nt thermofuse varistors	Datasheet	Non-Stocked Lead-Time 22 Weeks	$1.22 $1.19 $1.17	Min.: 750 Mult.: 750
Varistors 150VAC 10% 20mm 2-pin ThermoFuse B72220R2151K101 TDK 750: $1.19 Non-Stocked Lead-Time 22 Weeks	Mfr. Part No. B72220R2151K101 Mouser Part No 871-B72220R2151K101	TDK	Varistors 150VAC 10% 20mm 2-pin ThermoFuse Learn More about TDK epcos nt thermofuse varistors	Datasheet	Non-Stocked Lead-Time 22 Weeks	$1.19 $1.17 $1.11	Min.: 750 Mult.: 750

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