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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 #

Varistors 320VAC 10% 20mm 2-pin ThermoFuse

B72220R2321K101
TDK
1: 1,63 €
794In Stock

Mfr. Part No.
B72220R2321K101

Mouser Part No
871-B72220R2321K101

TDK

Varistors 320VAC 10% 20mm 2-pin ThermoFuse

Datasheet

794In Stock

1,63 €

1,20 €

1,10 €

0,955 €

View

Min.: 1
Mult.: 1

Varistors 130VAC 10% 20mm 3-pin ThermoFuse

B72220W2131K101
TDK
1: 1,88 €
590In Stock

Mfr. Part No.
B72220W2131K101

Mouser Part No
871-B72220W2131K101

TDK

Varistors 130VAC 10% 20mm 3-pin ThermoFuse

Datasheet

590In Stock

1,88 €

1,39 €

1,27 €

1,11 €

View

Min.: 1
Mult.: 1

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

B72230M0551M401
TDK
1: 9,86 €
349In Stock

Mfr. Part No.
B72230M0551M401

Mouser Part No
871-B72230M0551M401

TDK

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

Datasheet

349In Stock

9,86 €

7,74 €

6,89 €

6,36 €

View

Min.: 1
Mult.: 1

Varistors 510VAC 10% 20mm AdvanceD Thermofused

B72220T2511K105
TDK
1: 2,08 €
1.537In Stock

Mfr. Part No.
B72220T2511K105

Mouser Part No
871-B72220T2511K105

TDK

Varistors 510VAC 10% 20mm AdvanceD Thermofused

Datasheet

1.537In Stock

2,08 €

1,45 €

1,40 €

1,30 €

View

Min.: 1
Mult.: 1

Varistors 320VAC 10% 20mm AdvanceD Thermofused

B72220T2321K105
TDK
1: 2,19 €
1.655In Stock

Mfr. Part No.
B72220T2321K105

Mouser Part No
871-B72220T2321K105

TDK

Varistors 320VAC 10% 20mm AdvanceD Thermofused

Datasheet

1.655In Stock

2,19 €

1,63 €

1,48 €

1,32 €

View

Min.: 1
Mult.: 1

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

B72230M0151M401
TDK
1: 9,82 €
395In Stock

Mfr. Part No.
B72230M0151M401

Mouser Part No
871-B72230M0151M401

TDK

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

Datasheet

395In Stock

9,82 €

6,97 €

6,96 €

6,91 €

View

Min.: 1
Mult.: 1

Varistors 150V 14mm 2pin ThermoFuse Varistor

B72214R2151K101
TDK
1: 1,46 €
638In Stock

Mfr. Part No.
B72214R2151K101

Mouser Part No
871-B72214R2151K101

TDK

Varistors 150V 14mm 2pin ThermoFuse Varistor

Datasheet

638In Stock

1,46 €

1,08 €

0,98 €

0,903 €

View

Min.: 1
Mult.: 1

Varistors 275V 14mm 2pin ThermoFuse Varistor

B72214R2271K101
TDK
1: 1,26 €
532In Stock

Mfr. Part No.
B72214R2271K101

Mouser Part No
871-B72214R2271K101

TDK

Varistors 275V 14mm 2pin ThermoFuse Varistor

Datasheet

532In Stock

1,26 €

0,929 €

0,837 €

0,766 €

View

Min.: 1
Mult.: 1

Varistors 300V 14mm 2pin ThermoFuse Varistor

B72214R2301K101
TDK
1: 1,26 €
987In Stock

Mfr. Part No.
B72214R2301K101

Mouser Part No
871-B72214R2301K101

TDK

Varistors 300V 14mm 2pin ThermoFuse Varistor

Datasheet

987In Stock

1,26 €

0,929 €

0,837 €

0,832 €

View

Min.: 1
Mult.: 1

Varistors 175VAC 10% 14mm AdvanceD Thermofused

B72214T2171K105
TDK
1: 1,41 €
385In Stock

Mfr. Part No.
B72214T2171K105

Mouser Part No
871-B72214T2171K105

TDK

Varistors 175VAC 10% 14mm AdvanceD Thermofused

Datasheet

385In Stock

1,41 €

1,04 €

0,946 €

0,826 €

View

Min.: 1
Mult.: 1

Varistors 300VAC 10% 20mm 2-pin ThermoFuse

B72220R2301K101
TDK
1: 1,55 €
941In Stock

Mfr. Part No.
B72220R2301K101

Mouser Part No
871-B72220R2301K101

TDK

Varistors 300VAC 10% 20mm 2-pin ThermoFuse

Datasheet

941In Stock

1,55 €

1,14 €

1,04 €

0,972 €

View

Min.: 1
Mult.: 1

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

B72230M0511M401
TDK
1: 11,79 €
58In Stock

Mfr. Part No.
B72230M0511M401

Mouser Part No
871-B72230M0511M401

TDK

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

Datasheet

58In Stock

11,79 €

9,24 €

8,21 €

7,19 €

View

Min.: 1
Mult.: 1

Varistors 385VAC 10% 20mm AdvanceD Thermofused

B72220T2381K105
TDK
1: 1,82 €
500Expected 03/07/2026

Mfr. Part No.
B72220T2381K105

Mouser Part No
871-B72220T2381K105

TDK

Varistors 385VAC 10% 20mm AdvanceD Thermofused

Datasheet

500Expected 03/07/2026

1,82 €

1,36 €

1,24 €

1,11 €

View

Min.: 1
Mult.: 1

Varistors 275VAC 10% 20mm 3-pin ThermoFuse

B72220W2271K101
TDK
1: 1,62 €
632Expected 30/07/2026

Mfr. Part No.
B72220W2271K101

Mouser Part No
871-B72220W2271K101

TDK

Varistors 275VAC 10% 20mm 3-pin ThermoFuse

Datasheet

632Expected 30/07/2026

1,62 €

1,20 €

1,09 €

0,946 €

View

Min.: 1
Mult.: 1

Varistors 320V 14mm 2pin ThermoFuse Varistor

B72214R2321K101
TDK
1: 1,26 €
Lead-Time 10 Weeks

Mfr. Part No.
B72214R2321K101

Mouser Part No
871-B72214R2321K101

TDK

Varistors 320V 14mm 2pin ThermoFuse Varistor

Datasheet

Lead-Time 10 Weeks

1,26 €

0,929 €

0,837 €

0,81 €

View

Min.: 1
Mult.: 1

Varistors 150VAC 10% 14mm AdvanceD Thermofused

B72214T2151K105
TDK
1.960: 0,912 €
Non-Stocked Lead-Time 8 Weeks

Mfr. Part No.
B72214T2151K105

Mouser Part No
871-B72214T2151K105

TDK

Varistors 150VAC 10% 14mm AdvanceD Thermofused

Datasheet

Non-Stocked Lead-Time 8 Weeks

0,912 €

Min.: 1.960
Mult.: 1.960

Varistors 175VAC 10% 14mm AdvanceD Thermofused

B72214T2171K106
TDK
1.960: 0,766 €
Non-Stocked Lead-Time 8 Weeks

Mfr. Part No.
B72214T2171K106

Mouser Part No
871-B72214T2171K106

TDK

Varistors 175VAC 10% 14mm AdvanceD Thermofused

Datasheet

Non-Stocked Lead-Time 8 Weeks

0,766 €

Min.: 1.960
Mult.: 1.960

Varistors 300VAC 10% 14mm AdvanceD Thermofused

B72214T2301K106
TDK
1.960: 0,766 €
Non-Stocked Lead-Time 8 Weeks

Mfr. Part No.
B72214T2301K106

Mouser Part No
871-B72214T2301K106

TDK

Varistors 300VAC 10% 14mm AdvanceD Thermofused

Datasheet

Non-Stocked Lead-Time 8 Weeks

0,766 €

Min.: 1.960
Mult.: 1.960

Varistors 300VAC 10% 14mm AdvanceD Thermofused

B72214T2301K108
TDK
1.680: 0,785 €
Non-Stocked Lead-Time 8 Weeks

Mfr. Part No.
B72214T2301K108

Mouser Part No
871-B72214T2301K108

TDK

Varistors 300VAC 10% 14mm AdvanceD Thermofused

Datasheet

Non-Stocked Lead-Time 8 Weeks

0,785 €

0,766 €

Min.: 1.680
Mult.: 1.680

Varistors 320VAC 10% 14mm AdvanceD Thermofused

B72214T2321K106
TDK
1.960: 0,585 €
Non-Stocked Lead-Time 8 Weeks

Mfr. Part No.
B72214T2321K106

Mouser Part No
871-B72214T2321K106

TDK

Varistors 320VAC 10% 14mm AdvanceD Thermofused

Datasheet

Non-Stocked Lead-Time 8 Weeks

0,585 €

Min.: 1.960
Mult.: 1.960

Varistors 320VAC 10% 14mm 3-pin ThermoFuse

B72214W2321K101
TDK
1: 1,32 €
Non-Stocked Lead-Time 10 Weeks

Mfr. Part No.
B72214W2321K101

Mouser Part No
871-B72214W2321K101

TDK

Varistors 320VAC 10% 14mm 3-pin ThermoFuse

Datasheet

Non-Stocked Lead-Time 10 Weeks

1,32 €

0,972 €

0,886 €

0,714 €

View

Min.: 1
Mult.: 1

Varistors 380VAC 10% 14mm 3-pin ThermoFuse

B72214W2381K101
TDK
1.000: 0,71 €
Non-Stocked Lead-Time 10 Weeks

Mfr. Part No.
B72214W2381K101

Mouser Part No
871-B72214W2381K101

TDK

Varistors 380VAC 10% 14mm 3-pin ThermoFuse

Datasheet

Non-Stocked Lead-Time 10 Weeks

0,71 €

0,646 €

Min.: 1.000
Mult.: 1.000

Varistors 130VAC 10% 20mm 2-pin ThermoFuse

B72220R2131K101
TDK
750: 1,01 €
Non-Stocked Lead-Time 10 Weeks

Mfr. Part No.
B72220R2131K101

Mouser Part No
871-B72220R2131K101

TDK

Varistors 130VAC 10% 20mm 2-pin ThermoFuse

Datasheet

Non-Stocked Lead-Time 10 Weeks

1,01 €

0,915 €

Min.: 750
Mult.: 750

Varistors 150VAC 10% 20mm 2-pin ThermoFuse

B72220R2151K101
TDK
750: 1,01 €
Non-Stocked Lead-Time 10 Weeks

Mfr. Part No.
B72220R2151K101

Mouser Part No
871-B72220R2151K101

TDK

Varistors 150VAC 10% 20mm 2-pin ThermoFuse

Datasheet

Non-Stocked Lead-Time 10 Weeks

1,01 €

0,915 €

Min.: 750
Mult.: 750

Varistors 250VAC 10% 20mm 2-pin ThermoFuse

B72220R2251K101
TDK
1: 1,55 €
Lead-Time 10 Weeks

Mfr. Part No.
B72220R2251K101

Mouser Part No
871-B72220R2251K101

TDK

Varistors 250VAC 10% 20mm 2-pin ThermoFuse

Datasheet

Lead-Time 10 Weeks

1,55 €

1,14 €

1,04 €

0,903 €

View

Min.: 1
Mult.: 1