Circuit Protection – Mouser United Kingdom

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

Smart Thermostat Solutions

Littelfuse Smart Thermostat Solutions components allow designers to implement Internet of Things (IoT) solutions to boost energy efficiency and monitor energy usage. Littelfuse Smart Thermostat solutions complement other Smart Building features, including safety and security systems.

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

Types of Circuit Protection

List Images

Results: 627

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 #

Resettable Fuses - PPTC 24V 3.0A-HD 40A MAX

SMDC300F/24-2
Littelfuse
1: £0.533
560In Stock
8,000Expected 07/05/2026

Mfr. Part No.
SMDC300F/24-2

Mouser Part No
650-SMDC300F/24-2

Littelfuse

Resettable Fuses - PPTC 24V 3.0A-HD 40A MAX

Learn More

Datasheet

560In Stock

8,000Expected 07/05/2026

Cut Tape

£0.533

£0.485

£0.409

£0.377

View

Reel

£0.228

MouseReel Available

Min.: 1
Mult.: 1

Reel: 4,000

Surface Mount Fuses 125V .250A FA 1206

0437.250WR
Littelfuse
1: £0.882
955In Stock
3,000Expected 23/02/2026

Mfr. Part No.
0437.250WR

Mouser Part No
576-0437.250WR

Littelfuse

Surface Mount Fuses 125V .250A FA 1206

Learn More

Datasheet

955In Stock

3,000Expected 23/02/2026

Cut Tape

£0.882

£0.773

£0.723

£0.598

View

Reel

£0.495

MouseReel Available

Min.: 1
Mult.: 1

Reel: 3,000

Surface Mount Fuses 63V .500A FA 1206

0437.500WR
Littelfuse
1: £0.882
2,321In Stock
3,000Expected 16/03/2026

Mfr. Part No.
0437.500WR

Mouser Part No
576-0437.500WR

Littelfuse

Surface Mount Fuses 63V .500A FA 1206

Learn More

Datasheet

2,321In Stock

3,000Expected 16/03/2026

Cut Tape

£0.882

£0.773

£0.723

£0.598

View

Reel

£0.365

MouseReel Available

Min.: 1
Mult.: 1

Reel: 3,000

Surface Mount Fuses 63V .750A FA 1206

0437.750WR
Littelfuse
1: £1.08
1,356In Stock

Mfr. Part No.
0437.750WR

Mouser Part No
576-0437.750WR

Littelfuse

Surface Mount Fuses 63V .750A FA 1206

Learn More

Datasheet

1,356In Stock

Cut Tape

£1.08

£0.969

£0.908

£0.748

View

Reel

£0.457

MouseReel Available

Min.: 1
Mult.: 1

Reel: 3,000

Surface Mount Fuses 63V FA 1206 2A

0437002.WR
Littelfuse
1: £0.728
3,453In Stock
3,000Expected 23/03/2026

Mfr. Part No.
0437002.WR

Mouser Part No
576-0437002.WR

Littelfuse

Surface Mount Fuses 63V FA 1206 2A

Learn More

Datasheet

3,453In Stock

3,000Expected 23/03/2026

Cut Tape

£0.728

£0.62

Reel

£0.62

MouseReel Available

Min.: 1
Mult.: 1

Reel: 3,000

Surface Mount Fuses 32V FA 1206 4A

0437004.WR
Littelfuse
1: £1.08
2,010In Stock

Mfr. Part No.
0437004.WR

Mouser Part No
576-0437004.WR

Littelfuse

Surface Mount Fuses 32V FA 1206 4A

Learn More

Datasheet

2,010In Stock

Cut Tape

£1.08

£0.969

£0.908

£0.748

View

Reel

£0.457

MouseReel Available

Min.: 1
Mult.: 1

Reel: 3,000

Surface Mount Fuses 32V FA 1206 5A

0437005.WR
Littelfuse
1: £1.08
904In Stock
3,000Expected 23/03/2026

Mfr. Part No.
0437005.WR

Mouser Part No
576-0437005.WR

Littelfuse

Surface Mount Fuses 32V FA 1206 5A

Learn More

Datasheet

904In Stock

3,000Expected 23/03/2026

Cut Tape

£1.08

£0.969

£0.908

£0.748

View

Reel

£0.457

MouseReel Available

Min.: 1
Mult.: 1

Reel: 3,000

Surface Mount Fuses 3A Slo-Blo

0468003.NR
Littelfuse
1: £0.863
853In Stock
20,000On Order

Mfr. Part No.
0468003.NR

Mouser Part No
576-0468003.NR

Littelfuse

Surface Mount Fuses 3A Slo-Blo

Datasheet

853In Stock

20,000On Order

Cut Tape

£0.863

£0.738

£0.669

£0.571

View

Reel

£0.352

MouseReel Available

Min.: 1
Mult.: 1

Reel: 5,000

Surface Mount Fuses 1206 SLO-BLO 3A SLIMLINE

0468003.WR
Littelfuse
1: £1.16
568In Stock

Mfr. Part No.
0468003.WR

Mouser Part No
576-0468003.WR

Littelfuse

Surface Mount Fuses 1206 SLO-BLO 3A SLIMLINE

Datasheet

568In Stock

Cut Tape

£1.16

£1.05

£0.978

£0.811

View

Reel

£0.492

MouseReel Available

Min.: 1
Mult.: 1

Reel: 3,000

LED Protection Devices LED PROTECTOR Bi 13V DO214 2L RoHS

PLED13S
Littelfuse
1: £0.908
2,149In Stock
2,500Expected 26/02/2026

Mfr. Part No.
PLED13S

Mouser Part No
576-PLED13S

Littelfuse

LED Protection Devices LED PROTECTOR Bi 13V DO214 2L RoHS

Learn More

Datasheet

2,149In Stock

2,500Expected 26/02/2026

Cut Tape

£0.908

£0.571

£0.377

£0.292

£0.265

Reel

£0.247

MouseReel Available

Min.: 1
Mult.: 1

Reel: 2,500

ESD Protection Diodes / TVS Diodes SMF - A 100V

SMF100A
Littelfuse
1: £0.353
2,390In Stock
3,000Expected 22/05/2026

Mfr. Part No.
SMF100A

Mouser Part No
576-SMF100A

Littelfuse

ESD Protection Diodes / TVS Diodes SMF - A 100V

Learn More

Datasheet

2,390In Stock

3,000Expected 22/05/2026

Cut Tape

£0.353

£0.231

£0.12

£0.105

Reel

£0.064

View

Min.: 1
Mult.: 1

Reel: 3,000

ESD Protection Diodes / TVS Diodes 200W 10V 5% Uni-directional

SMF10A
Littelfuse
1: £0.18
8,641In Stock

Mfr. Part No.
SMF10A

Mouser Part No
576-SMF10A

Littelfuse

ESD Protection Diodes / TVS Diodes 200W 10V 5% Uni-directional

Learn More

Datasheet

8,641In Stock

Cut Tape

£0.18

£0.127

£0.099

£0.084

Reel

£0.065

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 3,000

ESD Protection Diodes / TVS Diodes SMF - A 110V

SMF110A
Littelfuse
1: £0.428
2,892In Stock

Mfr. Part No.
SMF110A

Mouser Part No
576-SMF110A

Littelfuse

ESD Protection Diodes / TVS Diodes SMF - A 110V

Learn More

Datasheet

2,892In Stock

Cut Tape

£0.428

£0.261

£0.167

£0.144

Reel

£0.094

£0.077

MouseReel Available

Min.: 1
Mult.: 1

Reel: 3,000

ESD Protection Diodes / TVS Diodes 200W 11V 5% Uni-directional

SMF11A
Littelfuse
1: £0.15
5,208In Stock

Mfr. Part No.
SMF11A

Mouser Part No
576-SMF11A

Littelfuse

ESD Protection Diodes / TVS Diodes 200W 11V 5% Uni-directional

Learn More

Datasheet

5,208In Stock

Cut Tape

£0.15

£0.106

£0.072

£0.067

£0.066

Reel

£0.062

MouseReel Available

Min.: 1
Mult.: 1

Reel: 3,000

ESD Protection Diodes / TVS Diodes SMF - CA 11V

SMF11CA
Littelfuse
1: £0.405
8,994In Stock

Mfr. Part No.
SMF11CA

Mouser Part No
576-SMF11CA

Littelfuse

ESD Protection Diodes / TVS Diodes SMF - CA 11V

Learn More

Datasheet

8,994In Stock

Cut Tape

£0.405

£0.251

£0.16

£0.12

Reel

£0.082

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 3,000

ESD Protection Diodes / TVS Diodes SMF - A 120V

SMF120A
Littelfuse
1: £0.436
2,460In Stock

Mfr. Part No.
SMF120A

Mouser Part No
576-SMF120A

Littelfuse

ESD Protection Diodes / TVS Diodes SMF - A 120V

Learn More

Datasheet

2,460In Stock

Cut Tape

£0.436

£0.265

£0.169

£0.145

Reel

£0.077

MouseReel Available

Min.: 1
Mult.: 1

Reel: 3,000

ESD Protection Diodes / TVS Diodes 200W 12V 5% Uni-directional

SMF12A
Littelfuse
1: £0.173
11,908In Stock

Mfr. Part No.
SMF12A

Mouser Part No
576-SMF12A

Littelfuse

ESD Protection Diodes / TVS Diodes 200W 12V 5% Uni-directional

Learn More

Datasheet

11,908In Stock

Cut Tape

£0.173

£0.141

£0.083

£0.081

Reel

£0.062

MouseReel Available

Min.: 1
Mult.: 1

Reel: 3,000

ESD Protection Diodes / TVS Diodes 200W 12V 5% Uni-directional

SMF12A-T13
Littelfuse
1: £0.263
7,950In Stock

Mfr. Part No.
SMF12A-T13

Mouser Part No
576-SMF12A-T13

Littelfuse

ESD Protection Diodes / TVS Diodes 200W 12V 5% Uni-directional

Learn More

Datasheet

7,950In Stock

Cut Tape

£0.263

£0.175

£0.074

£0.072

View

Reel

£0.064

MouseReel Available

Min.: 1
Mult.: 1

Reel: 10,000

ESD Protection Diodes / TVS Diodes 200W 13V 5% Uni-directional

SMF13A
Littelfuse
1: £0.21
2,761In Stock
18,000On Order

Mfr. Part No.
SMF13A

Mouser Part No
576-SMF13A

Littelfuse

ESD Protection Diodes / TVS Diodes 200W 13V 5% Uni-directional

Learn More

Datasheet

2,761In Stock

18,000On Order

Cut Tape

£0.21

£0.151

£0.105

£0.099

£0.088

Reel

£0.062

MouseReel Available

Min.: 1
Mult.: 1

Reel: 3,000

ESD Protection Diodes / TVS Diodes SMF - CA 13V

SMF13CA
Littelfuse
1: £0.375
7,060In Stock
6,000Expected 19/05/2026

Mfr. Part No.
SMF13CA

Mouser Part No
576-SMF13CA

Littelfuse

ESD Protection Diodes / TVS Diodes SMF - CA 13V

Learn More

Datasheet

7,060In Stock

6,000Expected 19/05/2026

Cut Tape

£0.375

£0.13

£0.112

£0.111

Reel

£0.091

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 3,000

ESD Protection Diodes / TVS Diodes 200W 14V 5% Uni-directional

SMF14A
Littelfuse
1: £0.263
6,114In Stock

Mfr. Part No.
SMF14A

Mouser Part No
576-SMF14A

Littelfuse

ESD Protection Diodes / TVS Diodes 200W 14V 5% Uni-directional

Learn More

Datasheet

6,114In Stock

Cut Tape

£0.263

£0.164

£0.094

£0.09

Reel

£0.067

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 3,000

ESD Protection Diodes / TVS Diodes SMF - CA 14V

SMF14CA
Littelfuse
1: £0.18
7,959In Stock

Mfr. Part No.
SMF14CA

Mouser Part No
576-SMF14CA

Littelfuse

ESD Protection Diodes / TVS Diodes SMF - CA 14V

Learn More

Datasheet

7,959In Stock

Cut Tape

£0.18

£0.153

£0.097

£0.096

Reel

£0.093

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 3,000

ESD Protection Diodes / TVS Diodes SMF - A 150V

SMF150A
Littelfuse
1: £0.39
6,147In Stock

Mfr. Part No.
SMF150A

Mouser Part No
576-SMF150A

Littelfuse

ESD Protection Diodes / TVS Diodes SMF - A 150V

Learn More

Datasheet

6,147In Stock

Cut Tape

£0.39

£0.256

£0.167

£0.119

Reel

£0.078

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 3,000

ESD Protection Diodes / TVS Diodes 200W 15V 5% Uni-directional

SMF15A
Littelfuse
1: £0.18
17,157In Stock

Mfr. Part No.
SMF15A

Mouser Part No
576-SMF15A

Littelfuse

ESD Protection Diodes / TVS Diodes 200W 15V 5% Uni-directional

Learn More

Datasheet

17,157In Stock

Cut Tape

£0.18

£0.135

£0.077

£0.073

Reel

£0.06

View

MouseReel Available

Min.: 1
Mult.: 1

Reel: 3,000

ESD Protection Diodes / TVS Diodes 200W 15V 5% Uni-directional

SMF15A-T13
Littelfuse
1: £0.278
9,713In Stock

Mfr. Part No.
SMF15A-T13

Mouser Part No
576-SMF15A-T13

Littelfuse

ESD Protection Diodes / TVS Diodes 200W 15V 5% Uni-directional

Learn More

Datasheet

9,713In Stock

Cut Tape

£0.278

£0.189

£0.083

£0.079

£0.072

Reel

£0.062

MouseReel Available

Min.: 1
Mult.: 1

Reel: 10,000

Smart Thermostat Solutions

Types of Circuit Protection

Customer Service Office

Company

Resources

Support