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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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Part #

Industrial Surge Protectors 550V 25kA 10% 4pin 30mm

B72230M0551M401
EPCOS / TDK
1: 9,68 €
349In Stock

Mfr. Part No.
B72230M0551M401

Mouser Part No
871-B72230M0551M401

Industrial Surge Protectors 550V 25kA 10% 4pin 30mm

Datasheet

349In Stock

9,68 €

7,55 €

6,70 €

6,15 €

View

Min.: 1
Mult.: 1

Industrial Surge Protectors 150V 25kA 10% 4pin 30mm

B72230M0151M401
EPCOS / TDK
1: 9,40 €
495In Stock

Mfr. Part No.
B72230M0151M401

Mouser Part No
871-B72230M0151M401

Industrial Surge Protectors 150V 25kA 10% 4pin 30mm

Datasheet

495In Stock

9,40 €

7,35 €

6,63 €

6,24 €

View

Min.: 1
Mult.: 1

Varistors 300VAC 10% 20mm 2-pin ThermoFuse

B72220R2301K101
EPCOS / TDK
1: 1,05 €
1 748In Stock

Mfr. Part No.
B72220R2301K101

Mouser Part No
871-B72220R2301K101

Varistors 300VAC 10% 20mm 2-pin ThermoFuse

Datasheet

1 748In Stock

1,05 €

0,886 €

0,842 €

0,783 €

View

Min.: 1
Mult.: 1

Industrial Surge Protectors 510V 25kA 10% 4pin 30mm

B72230M0511M401
EPCOS / TDK
1: 11,59 €
58In Stock

Mfr. Part No.
B72230M0511M401

Mouser Part No
871-B72230M0511M401

Industrial Surge Protectors 510V 25kA 10% 4pin 30mm

Datasheet

58In Stock

11,59 €

8,79 €

7,82 €

7,04 €

View

Min.: 1
Mult.: 1

Varistors 320VAC 10% 20mm 2-pin ThermoFuse

B72220R2321K101
EPCOS / TDK
1: 1,08 €
794In Stock

Mfr. Part No.
B72220R2321K101

Mouser Part No
871-B72220R2321K101

Varistors 320VAC 10% 20mm 2-pin ThermoFuse

Datasheet

794In Stock

1,08 €

0,903 €

0,869 €

0,805 €

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Min.: 1
Mult.: 1

Varistors 150V 14mm 2pin ThermoFuse Varistor

B72214R2151K101
EPCOS / TDK
1: 0,972 €
1 058In Stock

Mfr. Part No.
B72214R2151K101

Mouser Part No
871-B72214R2151K101

Varistors 150V 14mm 2pin ThermoFuse Varistor

Datasheet

1 058In Stock

0,972 €

0,765 €

0,715 €

0,667 €

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Min.: 1
Mult.: 1

Varistors 510VAC 10% 20mm AdvanceD Thermofused

B72220T2511K105
EPCOS / TDK
1: 2,08 €
1 539In Stock

Mfr. Part No.
B72220T2511K105

Mouser Part No
871-B72220T2511K105

Varistors 510VAC 10% 20mm AdvanceD Thermofused

Datasheet

1 539In Stock

2,08 €

1,45 €

1,40 €

1,30 €

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Min.: 1
Mult.: 1

Varistors 320VAC 10% 20mm AdvanceD Thermofused

B72220T2321K105
EPCOS / TDK
1: 1,68 €
2 355In Stock

Mfr. Part No.
B72220T2321K105

Mouser Part No
871-B72220T2321K105

Varistors 320VAC 10% 20mm AdvanceD Thermofused

Datasheet

2 355In Stock

1,68 €

1,24 €

1,14 €

1,01 €

View

Min.: 1
Mult.: 1

Varistors 275V 14mm 2pin ThermoFuse Varistor

B72214R2271K101
EPCOS / TDK
1: 1,16 €
1 032In Stock

Mfr. Part No.
B72214R2271K101

Mouser Part No
871-B72214R2271K101

Varistors 275V 14mm 2pin ThermoFuse Varistor

Datasheet

1 032In Stock

1,16 €

0,845 €

0,766 €

0,648 €

View

Min.: 1
Mult.: 1

Varistors 175VAC 10% 14mm AdvanceD Thermofused

B72214T2171K105
EPCOS / TDK
1: 1,30 €
489In Stock

Mfr. Part No.
B72214T2171K105

Mouser Part No
871-B72214T2171K105

Varistors 175VAC 10% 14mm AdvanceD Thermofused

Datasheet

489In Stock

1,30 €

0,955 €

0,869 €

0,754 €

View

Min.: 1
Mult.: 1

Varistors 275VAC 10% 20mm 3-pin ThermoFuse

B72220W2271K101
EPCOS / TDK
1: 1,49 €
244In Stock

Mfr. Part No.
B72220W2271K101

Mouser Part No
871-B72220W2271K101

Varistors 275VAC 10% 20mm 3-pin ThermoFuse

Datasheet

244In Stock

1,49 €

1,10 €

1,08 €

Min.: 1
Mult.: 1

Varistors 300V 14mm 2pin ThermoFuse Varistor

B72214R2301K101
EPCOS / TDK
1: 1,39 €
987Expected 13/04/2026

Mfr. Part No.
B72214R2301K101

Mouser Part No
871-B72214R2301K101

Varistors 300V 14mm 2pin ThermoFuse Varistor

Datasheet

987Expected 13/04/2026

1,39 €

1,01 €

0,92 €

0,777 €

View

Min.: 1
Mult.: 1

Varistors 130VAC 10% 20mm 3-pin ThermoFuse

B72220W2131K101
EPCOS / TDK
1: 1,49 €
600Expected 23/02/2026

Mfr. Part No.
B72220W2131K101

Mouser Part No
871-B72220W2131K101

Varistors 130VAC 10% 20mm 3-pin ThermoFuse

Datasheet

600Expected 23/02/2026

1,49 €

1,10 €

0,998 €

0,869 €

View

Min.: 1
Mult.: 1

Varistors 320V 14mm 2pin ThermoFuse Varistor

B72214R2321K101
EPCOS / TDK
1: 1,16 €
Lead-Time 22 Weeks

Mfr. Part No.
B72214R2321K101

Mouser Part No
871-B72214R2321K101

Varistors 320V 14mm 2pin ThermoFuse Varistor

Datasheet

Lead-Time 22 Weeks

1,16 €

0,845 €

0,766 €

0,648 €

View

Min.: 1
Mult.: 1

Varistors 150VAC 10% 14mm AdvanceD Thermofused

B72214T2151K105
EPCOS / TDK
1 960: 0,716 €
Non-Stocked Lead-Time 20 Weeks

Mfr. Part No.
B72214T2151K105

Mouser Part No
871-B72214T2151K105

Varistors 150VAC 10% 14mm AdvanceD Thermofused

Datasheet

Non-Stocked Lead-Time 20 Weeks

0,716 €

0,665 €

0,64 €

Min.: 1 960
Mult.: 980

Varistors 175VAC 10% 14mm AdvanceD Thermofused

B72214T2171K106
EPCOS / TDK
1 960: 0,652 €
Non-Stocked Lead-Time 20 Weeks

Mfr. Part No.
B72214T2171K106

Mouser Part No
871-B72214T2171K106

Varistors 175VAC 10% 14mm AdvanceD Thermofused

Datasheet

Non-Stocked Lead-Time 20 Weeks

0,652 €

Min.: 1 960
Mult.: 980

Varistors 300VAC 10% 14mm AdvanceD Thermofused

B72214T2301K106
EPCOS / TDK
1 960: 0,652 €
Non-Stocked Lead-Time 20 Weeks

Mfr. Part No.
B72214T2301K106

Mouser Part No
871-B72214T2301K106

Varistors 300VAC 10% 14mm AdvanceD Thermofused

Datasheet

Non-Stocked Lead-Time 20 Weeks

0,652 €

Min.: 1 960
Mult.: 980

Varistors 300VAC 10% 14mm AdvanceD Thermofused

B72214T2301K108
EPCOS / TDK
1 680: 0,656 €
Non-Stocked Lead-Time 20 Weeks

Mfr. Part No.
B72214T2301K108

Mouser Part No
871-B72214T2301K108

Varistors 300VAC 10% 14mm AdvanceD Thermofused

Datasheet

Non-Stocked Lead-Time 20 Weeks

0,656 €

0,653 €

Min.: 1 680
Mult.: 560

Varistors 320VAC 10% 14mm AdvanceD Thermofused

B72214T2321K106
EPCOS / TDK
1 960: 0,501 €
Non-Stocked Lead-Time 20 Weeks

Mfr. Part No.
B72214T2321K106

Mouser Part No
871-B72214T2321K106

Varistors 320VAC 10% 14mm AdvanceD Thermofused

Datasheet

Non-Stocked Lead-Time 20 Weeks

0,501 €

0,50 €

Min.: 1 960
Mult.: 980

Varistors 320VAC 10% 14mm 3-pin ThermoFuse

B72214W2321K101
EPCOS / TDK
1 000: 0,663 €
Non-Stocked Lead-Time 22 Weeks

Mfr. Part No.
B72214W2321K101

Mouser Part No
871-B72214W2321K101

Varistors 320VAC 10% 14mm 3-pin ThermoFuse

Datasheet

Non-Stocked Lead-Time 22 Weeks

0,663 €

0,616 €

0,593 €

Min.: 1 000
Mult.: 200

Varistors 380VAC 10% 14mm 3-pin ThermoFuse

B72214W2381K101
EPCOS / TDK
1 000: 0,663 €
Non-Stocked Lead-Time 22 Weeks

Mfr. Part No.
B72214W2381K101

Mouser Part No
871-B72214W2381K101

Varistors 380VAC 10% 14mm 3-pin ThermoFuse

Datasheet

Non-Stocked Lead-Time 22 Weeks

0,663 €

0,616 €

0,593 €

Min.: 1 000
Mult.: 200

Varistors 130VAC 10% 20mm 2-pin ThermoFuse

B72220R2131K101
EPCOS / TDK
1: 2,44 €
Non-Stocked Lead-Time 22 Weeks

Mfr. Part No.
B72220R2131K101

Mouser Part No
871-B72220R2131K101

Varistors 130VAC 10% 20mm 2-pin ThermoFuse

Datasheet

Non-Stocked Lead-Time 22 Weeks

2,44 €

1,54 €

1,37 €

1,16 €

View

Min.: 1
Mult.: 1

Varistors 150VAC 10% 20mm 2-pin ThermoFuse

B72220R2151K101
EPCOS / TDK
1: 2,44 €
Non-Stocked Lead-Time 22 Weeks

Mfr. Part No.
B72220R2151K101

Mouser Part No
871-B72220R2151K101

Varistors 150VAC 10% 20mm 2-pin ThermoFuse

Datasheet

Non-Stocked Lead-Time 22 Weeks

2,44 €

1,54 €

1,37 €

1,16 €

View

Min.: 1
Mult.: 1

Varistors 250VAC 10% 20mm 2-pin ThermoFuse

B72220R2251K101
EPCOS / TDK
1: 2,44 €
Lead-Time 22 Weeks

Mfr. Part No.
B72220R2251K101

Mouser Part No
871-B72220R2251K101

Varistors 250VAC 10% 20mm 2-pin ThermoFuse

Datasheet

Lead-Time 22 Weeks

2,44 €

1,54 €

1,37 €

1,16 €

View

Min.: 1
Mult.: 1

Varistors 275VAC 10% 20mm 2-pin ThermoFuse

B72220R2271K101
EPCOS / TDK
1: 1,43 €
Non-Stocked Lead-Time 22 Weeks

Mfr. Part No.
B72220R2271K101

Mouser Part No
871-B72220R2271K101

Varistors 275VAC 10% 20mm 2-pin ThermoFuse

Datasheet

Non-Stocked Lead-Time 22 Weeks

1,43 €

1,05 €

0,955 €

0,824 €

View

Min.: 1
Mult.: 1