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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: £8.45
349In Stock

Mfr. Part No.
B72230M0551M401

Mouser Part No
871-B72230M0551M401

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

Datasheet

349In Stock

£8.45

£6.59

£5.85

£5.37

View

Min.: 1
Mult.: 1

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

B72230M0151M401
EPCOS / TDK
1: £8.21
495In Stock

Mfr. Part No.
B72230M0151M401

Mouser Part No
871-B72230M0151M401

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

Datasheet

495In Stock

£8.21

£6.42

£5.79

£5.45

View

Min.: 1
Mult.: 1

Varistors 300VAC 10% 20mm 2-pin ThermoFuse

B72220R2301K101
EPCOS / TDK
1: £0.917
1,748In Stock

Mfr. Part No.
B72220R2301K101

Mouser Part No
871-B72220R2301K101

Varistors 300VAC 10% 20mm 2-pin ThermoFuse

Datasheet

1,748In Stock

£0.917

£0.773

£0.735

£0.684

View

Min.: 1
Mult.: 1

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

B72230M0511M401
EPCOS / TDK
1: £10.12
58In Stock

Mfr. Part No.
B72230M0511M401

Mouser Part No
871-B72230M0511M401

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

Datasheet

58In Stock

£10.12

£7.67

£6.83

£6.15

View

Min.: 1
Mult.: 1

Varistors 320VAC 10% 20mm 2-pin ThermoFuse

B72220R2321K101
EPCOS / TDK
1: £0.943
794In Stock

Mfr. Part No.
B72220R2321K101

Mouser Part No
871-B72220R2321K101

Varistors 320VAC 10% 20mm 2-pin ThermoFuse

Datasheet

794In Stock

£0.943

£0.788

£0.759

£0.703

View

Min.: 1
Mult.: 1

Varistors 150V 14mm 2pin ThermoFuse Varistor

B72214R2151K101
EPCOS / TDK
1: £0.849
1,058In Stock

Mfr. Part No.
B72214R2151K101

Mouser Part No
871-B72214R2151K101

Varistors 150V 14mm 2pin ThermoFuse Varistor

Datasheet

1,058In Stock

£0.849

£0.668

£0.624

£0.582

View

Min.: 1
Mult.: 1

Varistors 510VAC 10% 20mm AdvanceD Thermofused

B72220T2511K105
EPCOS / TDK
1: £1.82
1,539In Stock

Mfr. Part No.
B72220T2511K105

Mouser Part No
871-B72220T2511K105

Varistors 510VAC 10% 20mm AdvanceD Thermofused

Datasheet

1,539In Stock

£1.82

£1.27

£1.22

£1.13

View

Min.: 1
Mult.: 1

Varistors 320VAC 10% 20mm AdvanceD Thermofused

B72220T2321K105
EPCOS / TDK
1: £1.47
2,355In Stock

Mfr. Part No.
B72220T2321K105

Mouser Part No
871-B72220T2321K105

Varistors 320VAC 10% 20mm AdvanceD Thermofused

Datasheet

2,355In Stock

£1.47

£1.08

£0.995

£0.882

View

Min.: 1
Mult.: 1

Varistors 275V 14mm 2pin ThermoFuse Varistor

B72214R2271K101
EPCOS / TDK
1: £1.01
1,032In Stock

Mfr. Part No.
B72214R2271K101

Mouser Part No
871-B72214R2271K101

Varistors 275V 14mm 2pin ThermoFuse Varistor

Datasheet

1,032In Stock

£1.01

£0.738

£0.669

£0.566

View

Min.: 1
Mult.: 1

Varistors 175VAC 10% 14mm AdvanceD Thermofused

B72214T2171K105
EPCOS / TDK
1: £1.13
489In Stock

Mfr. Part No.
B72214T2171K105

Mouser Part No
871-B72214T2171K105

Varistors 175VAC 10% 14mm AdvanceD Thermofused

Datasheet

489In Stock

£1.13

£0.834

£0.759

£0.658

View

Min.: 1
Mult.: 1

Varistors 275VAC 10% 20mm 3-pin ThermoFuse

B72220W2271K101
EPCOS / TDK
1: £1.30
244In Stock

Mfr. Part No.
B72220W2271K101

Mouser Part No
871-B72220W2271K101

Varistors 275VAC 10% 20mm 3-pin ThermoFuse

Datasheet

244In Stock

£1.30

£0.96

£0.943

Min.: 1
Mult.: 1

Varistors 300V 14mm 2pin ThermoFuse Varistor

B72214R2301K101
EPCOS / TDK
1: £1.21
987Expected 13/04/2026

Mfr. Part No.
B72214R2301K101

Mouser Part No
871-B72214R2301K101

Varistors 300V 14mm 2pin ThermoFuse Varistor

Datasheet

987Expected 13/04/2026

£1.21

£0.882

£0.803

£0.678

View

Min.: 1
Mult.: 1

Varistors 130VAC 10% 20mm 3-pin ThermoFuse

B72220W2131K101
EPCOS / TDK
1: £1.30
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

£1.30

£0.96

£0.871

£0.759

View

Min.: 1
Mult.: 1

Varistors 320V 14mm 2pin ThermoFuse Varistor

B72214R2321K101
EPCOS / TDK
1: £1.01
Lead-Time 22 Weeks

Mfr. Part No.
B72214R2321K101

Mouser Part No
871-B72214R2321K101

Varistors 320V 14mm 2pin ThermoFuse Varistor

Datasheet

Lead-Time 22 Weeks

£1.01

£0.738

£0.669

£0.566

View

Min.: 1
Mult.: 1

Varistors 150VAC 10% 14mm AdvanceD Thermofused

B72214T2151K105
EPCOS / TDK
1,960: £0.625
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

£0.625

£0.581

£0.559

Min.: 1,960
Mult.: 980

Varistors 175VAC 10% 14mm AdvanceD Thermofused

B72214T2171K106
EPCOS / TDK
1,960: £0.569
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

£0.569

Min.: 1,960
Mult.: 980

Varistors 300VAC 10% 14mm AdvanceD Thermofused

B72214T2301K106
EPCOS / TDK
1,960: £0.569
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

£0.569

Min.: 1,960
Mult.: 980

Varistors 300VAC 10% 14mm AdvanceD Thermofused

B72214T2301K108
EPCOS / TDK
1,680: £0.573
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

£0.573

£0.57

Min.: 1,680
Mult.: 560

Varistors 320VAC 10% 14mm AdvanceD Thermofused

B72214T2321K106
EPCOS / TDK
1,960: £0.437
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

£0.437

Min.: 1,960
Mult.: 980

Varistors 320VAC 10% 14mm 3-pin ThermoFuse

B72214W2321K101
EPCOS / TDK
1,000: £0.579
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

£0.579

£0.538

£0.518

Min.: 1,000
Mult.: 200

Varistors 380VAC 10% 14mm 3-pin ThermoFuse

B72214W2381K101
EPCOS / TDK
1,000: £0.579
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

£0.579

£0.538

£0.518

Min.: 1,000
Mult.: 200

Varistors 130VAC 10% 20mm 2-pin ThermoFuse

B72220R2131K101
EPCOS / TDK
1: £2.13
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

£2.13

£1.34

£1.20

£1.01

View

Min.: 1
Mult.: 1

Varistors 150VAC 10% 20mm 2-pin ThermoFuse

B72220R2151K101
EPCOS / TDK
1: £2.13
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

£2.13

£1.34

£1.20

£1.01

View

Min.: 1
Mult.: 1

Varistors 250VAC 10% 20mm 2-pin ThermoFuse

B72220R2251K101
EPCOS / TDK
1: £2.13
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

£2.13

£1.34

£1.20

£1.01

View

Min.: 1
Mult.: 1

Varistors 275VAC 10% 20mm 2-pin ThermoFuse

B72220R2271K101
EPCOS / TDK
1: £1.25
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

£1.25

£0.917

£0.834

£0.719

View

Min.: 1
Mult.: 1