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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 (CLP) Filter the results in the table by unit price based on your quantity.	Qty.
Varistors 385VAC 10% 20mm AdvanceD Thermofused B72220T2381K105 TDK 1: $3.247 493In Stock	Mfr. Part # B72220T2381K105 Mouser Part # 871-B72220T2381K105	TDK	Varistors 385VAC 10% 20mm AdvanceD Thermofused Learn More about TDK epcos t varistor	Datasheet	493In Stock	$3.247 $2.187 $1.960 $1.846 View $1.675 $1.401 $1.379 $1.344	Min.: 1 Mult.: 1
Industrial Surge Protectors 550V 25kA 10% 4pin 30mm B72230M0551M401 TDK 1: $15.278 346In Stock	Mfr. Part # B72230M0551M401 Mouser Part # 871-B72230M0551M401	TDK	Industrial Surge Protectors 550V 25kA 10% 4pin 30mm Learn More about TDK mt30 thermofuse varistors	Datasheet	346In Stock	$15.278 $11.427 $10.755 $10.265 View $8.955 $8.795	Min.: 1 Mult.: 1
Varistors 510VAC 10% 20mm AdvanceD Thermofused B72220T2511K105 TDK 1: $4.489 1.534In Stock	Mfr. Part # B72220T2511K105 Mouser Part # 871-B72220T2511K105	TDK	Varistors 510VAC 10% 20mm AdvanceD Thermofused Learn More about TDK epcos t varistor	Datasheet	1.534In Stock	$4.489 $2.837 $2.598 $2.210 View $2.073 $1.823 $1.527 $1.492 $1.470	Min.: 1 Mult.: 1
Varistors 275V 14mm 2pin ThermoFuse Varistor B72214R2271K101 TDK 1: $1.868 451In Stock	Mfr. Part # B72214R2271K101 Mouser Part # 871-B72214R2271K101	TDK	Varistors 275V 14mm 2pin ThermoFuse Varistor Learn More about TDK epcos nt thermofuse varistors	Datasheet	451In Stock	$1.868 $1.242 $1.099 $1.033 View $993 $946 $919 $905	Min.: 1 Mult.: 1
Varistors 175VAC 10% 14mm AdvanceD Thermofused B72214T2171K105 TDK 1: $2.085 385In Stock	Mfr. Part # B72214T2171K105 Mouser Part # 871-B72214T2171K105	TDK	Varistors 175VAC 10% 14mm AdvanceD Thermofused Learn More about TDK epcos t varistor	Datasheet	385In Stock	$2.085 $1.401 $1.242 $1.173 View $1.123 $1.058 $1.031 $1.021	Min.: 1 Mult.: 1
Varistors 300VAC 10% 20mm 2-pin ThermoFuse B72220R2301K101 TDK 1: $2.290 941In Stock	Mfr. Part # B72220R2301K101 Mouser Part # 871-B72220R2301K101	TDK	Varistors 300VAC 10% 20mm 2-pin ThermoFuse Learn More about TDK epcos nt thermofuse varistors	Datasheet	941In Stock	$2.290 $1.538 $1.401 $1.173 View $1.151 $1.135	Min.: 1 Mult.: 1
Varistors 320VAC 10% 20mm 2-pin ThermoFuse B72220R2321K101 TDK 1: $2.290 664In Stock	Mfr. Part # B72220R2321K101 Mouser Part # 871-B72220R2321K101	TDK	Varistors 320VAC 10% 20mm 2-pin ThermoFuse Learn More about TDK epcos nt thermofuse varistors	Datasheet	664In Stock	$2.290 $1.538 $1.379 $1.299 View $1.151 $1.128 $1.102 $1.099	Min.: 1 Mult.: 1
Varistors 320VAC 10% 20mm AdvanceD Thermofused B72220T2321K105 TDK 1: $2.700 627In Stock 1.500Expected 1/4/2027	Mfr. Part # B72220T2321K105 Mouser Part # 871-B72220T2321K105	TDK	Varistors 320VAC 10% 20mm AdvanceD Thermofused Learn More about TDK epcos t varistor	Datasheet	627In Stock 1.500Expected 1/4/2027	$2.700 $1.823 $1.641 $1.538 View $1.492 $1.413 $1.390 $1.356 Quote	Min.: 1 Mult.: 1
Varistors 130VAC 10% 20mm 3-pin ThermoFuse B72220W2131K101 TDK 1: $2.780 580In Stock	Mfr. Part # B72220W2131K101 Mouser Part # 871-B72220W2131K101	TDK	Varistors 130VAC 10% 20mm 3-pin ThermoFuse Learn More about TDK epcos nt thermofuse varistors	Datasheet	580In Stock	$2.780 $1.880 $1.686 $1.413 View $1.401 $1.333	Min.: 1 Mult.: 1
Varistors 275VAC 10% 20mm 3-pin ThermoFuse B72220W2271K101 TDK 1: $2.392 555In Stock	Mfr. Part # B72220W2271K101 Mouser Part # 871-B72220W2271K101	TDK	Varistors 275VAC 10% 20mm 3-pin ThermoFuse Learn More about TDK epcos nt thermofuse varistors	Datasheet	555In Stock	$2.392 $1.618 $1.435 $1.356 View $1.242 $1.208 $1.185	Min.: 1 Mult.: 1
Industrial Surge Protectors 510V 25kA 10% 4pin 30mm B72230M0511M401 TDK 1: $16.132 38In Stock	Mfr. Part # B72230M0511M401 Mouser Part # 871-B72230M0511M401	TDK	Industrial Surge Protectors 510V 25kA 10% 4pin 30mm Learn More about TDK mt30 thermofuse varistors	Datasheet	38In Stock	$16.132 $12.236 $10.618 $9.183 View $8.955 $8.852	Min.: 1 Mult.: 1
Varistors 300V 14mm 2pin ThermoFuse Varistor B72214R2301K101 TDK 1: $1.971 3.000Expected 11/30/2026	Mfr. Part # B72214R2301K101 Mouser Part # 871-B72214R2301K101	TDK	Varistors 300V 14mm 2pin ThermoFuse Varistor Learn More about TDK epcos nt thermofuse varistors	Datasheet	3.000Expected 11/30/2026	$1.971 $1.322 $1.173 $1.095 View $1.053 $934 $923 $854 $853	Min.: 1 Mult.: 1
Varistors 150V 14mm 2pin ThermoFuse Varistor B72214R2151K101 TDK 1: $2.290 981Expected 12/7/2026	Mfr. Part # B72214R2151K101 Mouser Part # 871-B72214R2151K101	TDK	Varistors 150V 14mm 2pin ThermoFuse Varistor Learn More about TDK epcos nt thermofuse varistors	Datasheet	981Expected 12/7/2026	$2.290 $1.538 $1.367 $1.287 View $1.242 $1.139 $1.128 $1.033 $1.031	Min.: 1 Mult.: 1
Varistors 320V 14mm 2pin ThermoFuse Varistor B72214R2321K101 TDK 1.000: $960 Non-Stocked Lead-Time 10 Weeks	Mfr. Part # B72214R2321K101 Mouser Part # 871-B72214R2321K101	TDK	Varistors 320V 14mm 2pin ThermoFuse Varistor Learn More about TDK epcos nt thermofuse varistors	Datasheet	Non-Stocked Lead-Time 10 Weeks	$960 $919 $880 $877	Min.: 1.000 Mult.: 1.000
Varistors 150VAC 10% 14mm AdvanceD Thermofused B72214T2151K105 TDK 1: $3.190 Non-Stocked Lead-Time 10 Weeks	Mfr. Part # B72214T2151K105 Mouser Part # 871-B72214T2151K105	TDK	Varistors 150VAC 10% 14mm AdvanceD Thermofused Learn More about TDK epcos t varistor	Datasheet	Non-Stocked Lead-Time 10 Weeks	$3.190 $2.267 $1.891 $1.789 View $1.606 $1.344 $1.287	Min.: 1 Mult.: 1
Varistors 175VAC 10% 14mm AdvanceD Thermofused B72214T2171K106 TDK 1.960: $1.060 Non-Stocked Lead-Time 10 Weeks	Mfr. Part # B72214T2171K106 Mouser Part # 871-B72214T2171K106	TDK	Varistors 175VAC 10% 14mm AdvanceD Thermofused Learn More about TDK epcos t varistor	Datasheet	Non-Stocked Lead-Time 10 Weeks	$1.060	Min.: 1.960 Mult.: 1.960
Varistors 300VAC 10% 14mm AdvanceD Thermofused B72214T2301K106 TDK 1: $3.213 Non-Stocked Lead-Time 10 Weeks	Mfr. Part # B72214T2301K106 Mouser Part # 871-B72214T2301K106	TDK	Varistors 300VAC 10% 14mm AdvanceD Thermofused Learn More about TDK epcos t varistor	Datasheet	Non-Stocked Lead-Time 10 Weeks	$3.213 $2.028 $1.538 $1.435 View $1.265 $1.061 $1.057 $1.056	Min.: 1 Mult.: 1
Varistors 300VAC 10% 14mm AdvanceD Thermofused B72214T2301K108 TDK 1.680: $1.060 Non-Stocked Lead-Time 10 Weeks	Mfr. Part # B72214T2301K108 Mouser Part # 871-B72214T2301K108	TDK	Varistors 300VAC 10% 14mm AdvanceD Thermofused Learn More about TDK epcos t varistor	Datasheet	Non-Stocked Lead-Time 10 Weeks	$1.060	Min.: 1.680 Mult.: 1.680
Varistors 320VAC 10% 14mm AdvanceD Thermofused B72214T2321K106 TDK 1.960: $813 Non-Stocked Lead-Time 10 Weeks	Mfr. Part # B72214T2321K106 Mouser Part # 871-B72214T2321K106	TDK	Varistors 320VAC 10% 14mm AdvanceD Thermofused Learn More about TDK epcos t varistor	Datasheet	Non-Stocked Lead-Time 10 Weeks	$813 $811 $810	Min.: 1.960 Mult.: 1.960
Varistors 320VAC 10% 14mm 3-pin ThermoFuse B72214W2321K101 TDK 1.000: $1.061 Non-Stocked Lead-Time 10 Weeks	Mfr. Part # B72214W2321K101 Mouser Part # 871-B72214W2321K101	TDK	Varistors 320VAC 10% 14mm 3-pin ThermoFuse Learn More about TDK epcos nt thermofuse varistors	Datasheet	Non-Stocked Lead-Time 10 Weeks	$1.061 $1.025 $984 $983	Min.: 1.000 Mult.: 1.000
Varistors 380VAC 10% 14mm 3-pin ThermoFuse B72214W2381K101 TDK 1: $2.073 Non-Stocked Lead-Time 10 Weeks	Mfr. Part # B72214W2381K101 Mouser Part # 871-B72214W2381K101	TDK	Varistors 380VAC 10% 14mm 3-pin ThermoFuse Learn More about TDK epcos nt thermofuse varistors	Datasheet	Non-Stocked Lead-Time 10 Weeks	$2.073 $1.379 $1.230 $1.151 View $1.107 $1.013 $1.003 $923 $921	Min.: 1 Mult.: 1
Varistors 130VAC 10% 20mm 2-pin ThermoFuse B72220R2131K101 TDK 750: $1.390 Non-Stocked Lead-Time 10 Weeks	Mfr. Part # B72220R2131K101 Mouser Part # 871-B72220R2131K101	TDK	Varistors 130VAC 10% 20mm 2-pin ThermoFuse Learn More about TDK epcos nt thermofuse varistors	Datasheet	Non-Stocked Lead-Time 10 Weeks	$1.390 $1.356 $1.333	Min.: 750 Mult.: 750
Varistors 150VAC 10% 20mm 2-pin ThermoFuse B72220R2151K101 TDK 750: $1.367 Non-Stocked Lead-Time 10 Weeks	Mfr. Part # B72220R2151K101 Mouser Part # 871-B72220R2151K101	TDK	Varistors 150VAC 10% 20mm 2-pin ThermoFuse Learn More about TDK epcos nt thermofuse varistors	Datasheet	Non-Stocked Lead-Time 10 Weeks	$1.367 $1.333 $1.310	Min.: 750 Mult.: 750
Varistors 250VAC 10% 20mm 2-pin ThermoFuse B72220R2251K101 TDK 1: $2.427 Non-Stocked Lead-Time 10 Weeks	Mfr. Part # B72220R2251K101 Mouser Part # 871-B72220R2251K101	TDK	Varistors 250VAC 10% 20mm 2-pin ThermoFuse Learn More about TDK epcos nt thermofuse varistors	Datasheet	Non-Stocked Lead-Time 10 Weeks	$2.427 $1.629 $1.458 $1.379 View $1.299 $1.253 $1.219 $1.196	Min.: 1 Mult.: 1
Varistors 275VAC 10% 20mm 2-pin ThermoFuse B72220R2271K101 TDK 1: $2.290 Non-Stocked Lead-Time 10 Weeks	Mfr. Part # B72220R2271K101 Mouser Part # 871-B72220R2271K101	TDK	Varistors 275VAC 10% 20mm 2-pin ThermoFuse Learn More about TDK epcos nt thermofuse varistors	Datasheet	Non-Stocked Lead-Time 10 Weeks	$2.290 $1.538 $1.379 $1.299 View $1.230 $1.173 $1.139 $1.135	Min.: 1 Mult.: 1

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ThermoFuse™ Varistors

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