.hide-partial { max-height: none; } .show-more { display: none; }

Semitec Circuit Protection

.catnav-wrapper { height: auto; overflow: visible; } .catalog-nav-tabs ul { white-space: normal; }

Types of Circuit Protection

List Images

Results: 457

Search within results

In Stock

Normally Stocked

Active

New Products

RoHS Compliant

.search-refine-wrapper { display: inline-block; min-width: 100%; } .scroll-body { overflow-x: visible; } .search-table-wrapper { overflow: visible; } .hide-partial { max-height: none; } .show-more { display: none; }

Part #

NTC (Negative Temperature Coefficient) Thermistors 4ohms 8amps Straight Lead

4D2-22LD
Semitec
1: £2.14
244In Stock

Mfr. Part No.
4D2-22LD

Mouser Part No
954-4D2-22LD

Semitec

NTC (Negative Temperature Coefficient) Thermistors 4ohms 8amps Straight Lead

Datasheet

244In Stock

£2.14

£1.66

£1.47

£1.24

View

Min.: 1
Mult.: 1

NTC (Negative Temperature Coefficient) Thermistors 5ohms 2amps Clinch Short Lead

5D2-05LCS
Semitec
1: £0.509
158In Stock

Mfr. Part No.
5D2-05LCS

Mouser Part No
954-5D2-05LCS

Semitec

NTC (Negative Temperature Coefficient) Thermistors 5ohms 2amps Clinch Short Lead

Datasheet

158In Stock

£0.509

£0.391

£0.337

£0.277

View

Min.: 1
Mult.: 1

NTC (Negative Temperature Coefficient) Thermistors 83kohm 3%

833ET-2
Semitec
1: £0.659
327In Stock

Mfr. Part No.
833ET-2

Mouser Part No
954-833ET-2

Semitec

NTC (Negative Temperature Coefficient) Thermistors 83kohm 3%

Learn More

Datasheet

327In Stock

£0.659

£0.50

£0.431

£0.416

View

Min.: 1
Mult.: 1

NTC (Negative Temperature Coefficient) Thermistors 6ohms 6amps Straight Lead

8D2-18LD
Semitec
1: £1.96
29In Stock
250Expected 06/03/2026

Mfr. Part No.
8D2-18LD

Mouser Part No
954-8D2-18LD

Semitec

NTC (Negative Temperature Coefficient) Thermistors 6ohms 6amps Straight Lead

Datasheet

29In Stock

250Expected 06/03/2026

£1.96

£1.52

£1.27

£1.24

View

Min.: 1
Mult.: 1

Varistors 33V 1000A 16mm

Z15D330
Semitec
1: £1.48
989In Stock

Mfr. Part No.
Z15D330

Mouser Part No
954-Z15D330

Semitec

Varistors 33V 1000A 16mm

Datasheet

989In Stock

£1.48

£0.917

£0.603

£0.564

View

Min.: 1
Mult.: 1

Varistors 82V 4500A 16mm

Z15D820
Semitec
1: £1.48
100In Stock
1,000Expected 01/05/2026

Mfr. Part No.
Z15D820

Mouser Part No
954-Z15D820

Semitec

Varistors 82V 4500A 16mm

Datasheet

100In Stock

1,000Expected 01/05/2026

£1.48

£0.917

£0.603

£0.564

View

Min.: 1
Mult.: 1

Varistors 820V 6500A 22.5mm

Z21D821
Semitec
1: £3.63
6In Stock

Mfr. Part No.
Z21D821

Mouser Part No
954-Z21D821

Semitec

Varistors 820V 6500A 22.5mm

Datasheet

6In Stock

£3.63

£2.40

£2.03

£1.82

View

Min.: 1
Mult.: 1

ESD Protection Diodes / TVS Diodes 27V 250W

ZS1027U-T
Semitec
1: £1.42
1,026In Stock

Mfr. Part No.
ZS1027U-T

Mouser Part No
954-ZS1027U-T

Semitec

ESD Protection Diodes / TVS Diodes 27V 250W

Datasheet

1,026In Stock

Cut Tape

£1.42

£0.899

£0.593

£0.464

Reel

£0.355

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 1,500

NTC (Negative Temperature Coefficient) Thermistors 1.5ohms 8amps Straight Lead

1.5D2-15LD
Semitec
1: £1.28
198In Stock

Mfr. Part No.
1.5D2-15LD

Mouser Part No
954-1.5D2-15LD

Semitec

NTC (Negative Temperature Coefficient) Thermistors 1.5ohms 8amps Straight Lead

Datasheet

198In Stock

£1.28

£0.96

£0.772

£0.725

View

Min.: 1
Mult.: 1

NTC (Negative Temperature Coefficient) Thermistors 10kohm 0.5%

103AP-2-A
Semitec
1: £0.519
37In Stock
400Expected 04/05/2026

Mfr. Part No.
103AP-2-A

Mouser Part No
954-103AP-2-A

Semitec

NTC (Negative Temperature Coefficient) Thermistors 10kohm 0.5%

Learn More

Datasheet

37In Stock

400Expected 04/05/2026

£0.519

£0.488

£0.457

£0.434

View

Min.: 1
Mult.: 1

NTC (Negative Temperature Coefficient) Thermistors 15ohms 4amps Clinch lead

15D2-15LC
Semitec
1: £1.28
107In Stock

Mfr. Part No.
15D2-15LC

Mouser Part No
954-15D2-15LC

Semitec

NTC (Negative Temperature Coefficient) Thermistors 15ohms 4amps Clinch lead

Datasheet

107In Stock

£1.28

£0.96

£0.772

£0.725

View

Min.: 1
Mult.: 1

NTC (Negative Temperature Coefficient) Thermistors 1ohms 8amps Straight Lead

1D2-15LD
Semitec
1: £0.995
353In Stock

Mfr. Part No.
1D2-15LD

Mouser Part No
954-1D2-15LD

Semitec

NTC (Negative Temperature Coefficient) Thermistors 1ohms 8amps Straight Lead

Datasheet

353In Stock

£0.995

£0.743

£0.603

£0.512

View

Min.: 1
Mult.: 1

NTC (Negative Temperature Coefficient) Thermistors 20kohm 0.5%

203AP-2
Semitec
1: £0.755
168In Stock

Mfr. Part No.
203AP-2

Mouser Part No
954-203AP-2

Semitec

NTC (Negative Temperature Coefficient) Thermistors 20kohm 0.5%

Learn More

Datasheet

168In Stock

£0.755

£0.575

£0.495

£0.478

View

Min.: 1
Mult.: 1

NTC (Negative Temperature Coefficient) Thermistors 200kohm 3%

204NT-4-R025H43G
Semitec
1: £0.659
466In Stock

Mfr. Part No.
204NT-4-R025H43G

Mouser Part No
954-204NT-4-R025H43G

Semitec

NTC (Negative Temperature Coefficient) Thermistors 200kohm 3%

Datasheet

466In Stock

£0.659

£0.624

£0.585

£0.557

View

Min.: 1
Mult.: 1

NTC (Negative Temperature Coefficient) Thermistors 232kohm 3%

234ET-2
Semitec
1: £0.659
9In Stock

Mfr. Part No.
234ET-2

Mouser Part No
954-234ET-2

Semitec

NTC (Negative Temperature Coefficient) Thermistors 232kohm 3%

Learn More

Datasheet

9In Stock

£0.659

£0.50

£0.431

£0.416

View

Min.: 1
Mult.: 1

NTC (Negative Temperature Coefficient) Thermistors 40kohm 3%

403ET-2
Semitec
1: £0.843
193In Stock

Mfr. Part No.
403ET-2

Mouser Part No
954-403ET-2

Semitec

NTC (Negative Temperature Coefficient) Thermistors 40kohm 3%

Learn More

Datasheet

193In Stock

£0.843

£0.65

£0.56

£0.54

View

Min.: 1
Mult.: 1

NTC (Negative Temperature Coefficient) Thermistors 4ohms 8amps Clinch lead

4D2-22LC
Semitec
1: £2.14
38In Stock

Mfr. Part No.
4D2-22LC

Mouser Part No
954-4D2-22LC

Semitec

NTC (Negative Temperature Coefficient) Thermistors 4ohms 8amps Clinch lead

Datasheet

38In Stock

£2.14

£1.66

£1.47

£1.24

View

Min.: 1
Mult.: 1

NTC (Negative Temperature Coefficient) Thermistors 5ohms 3amps Straight Lead

5D2-07LD
Semitec
1: £0.387
205In Stock

Mfr. Part No.
5D2-07LD

Mouser Part No
954-5D2-07LD

Semitec

NTC (Negative Temperature Coefficient) Thermistors 5ohms 3amps Straight Lead

Datasheet

205In Stock

£0.387

£0.292

£0.251

£0.205

View

Min.: 1
Mult.: 1

NTC (Negative Temperature Coefficient) Thermistors 5ohms 3amps Straight Lead

5D2-08LD
Semitec
1: £0.65
455In Stock

Mfr. Part No.
5D2-08LD

Mouser Part No
954-5D2-08LD

Semitec

NTC (Negative Temperature Coefficient) Thermistors 5ohms 3amps Straight Lead

Datasheet

455In Stock

£0.65

£0.498

£0.429

£0.414

View

Min.: 1
Mult.: 1

NTC (Negative Temperature Coefficient) Thermistors 5ohms 8amps Clinch Short Lead

5D2-18LCS
Semitec
1: £1.74
47In Stock

Mfr. Part No.
5D2-18LCS

Mouser Part No
954-5D2-18LCS

Semitec

NTC (Negative Temperature Coefficient) Thermistors 5ohms 8amps Clinch Short Lead

Datasheet

47In Stock

£1.74

£1.31

£1.11

£0.934

View

Min.: 1
Mult.: 1

NTC (Negative Temperature Coefficient) Thermistors 9.1kohm 5%

912CT-4
Semitec
1: £0.925
459In Stock

Mfr. Part No.
912CT-4

Mouser Part No
954-912CT-4

Semitec

NTC (Negative Temperature Coefficient) Thermistors 9.1kohm 5%

Datasheet

459In Stock

£0.925

£0.69

£0.553

£0.519

View

Min.: 1
Mult.: 1

Varistors 120V 2500A 12.5mm

Z10D121
Semitec
1: £1.24
980In Stock

Mfr. Part No.
Z10D121

Mouser Part No
954-Z10D121

Semitec

Varistors 120V 2500A 12.5mm

Datasheet

980In Stock

£1.24

£0.757

£0.495

£0.46

View

Min.: 1
Mult.: 1

Varistors 680V 2500A 12.5mm

Z10D681
Semitec
1: £1.13
790In Stock

Mfr. Part No.
Z10D681

Mouser Part No
954-Z10D681

Semitec

Varistors 680V 2500A 12.5mm

Datasheet

790In Stock

£1.13

£0.684

£0.437

£0.401

View

Min.: 1
Mult.: 1

Varistors 82V 2500A 12.5mm

Z10D820
Semitec
1: £1.24
906In Stock

Mfr. Part No.
Z10D820

Mouser Part No
954-Z10D820

Semitec

Varistors 82V 2500A 12.5mm

Datasheet

906In Stock

£1.24

£0.757

£0.495

£0.46

View

Min.: 1
Mult.: 1

Varistors 270V 4500A 16mm

Z15D271
Semitec
1: £1.48
731In Stock

Mfr. Part No.
Z15D271

Mouser Part No
954-Z15D271

Semitec

Varistors 270V 4500A 16mm

Datasheet

731In Stock

£1.48

£0.917

£0.603

£0.564

View

Min.: 1
Mult.: 1

Semitec Circuit Protection

Types of Circuit Protection

Customer Service Office

Company

Resources

Support