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: 540

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 #

ESD Protection Diodes / TVS Diodes 400W 16V 5% Bi-Directional

SMAJ16CA
Littelfuse
1: £0.361
17,200In Stock
50,000Expected 29/10/2026

Mfr. Part No.
SMAJ16CA

Mouser Part No
576-SMAJ16CA

Littelfuse

ESD Protection Diodes / TVS Diodes 400W 16V 5% Bi-Directional

Learn More

Datasheet

17,200In Stock

50,000Expected 29/10/2026

Cut Tape

£0.361

£0.169

£0.142

£0.107

Reel

£0.064

View

MouseReel Available

Min.: 1
Mult.: 1

: 5,000

ESD Protection Diodes / TVS Diodes 400W 220V 5% Bi-Directional

SMAJ220CA
Littelfuse
1: £0.728
8,102In Stock

Mfr. Part No.
SMAJ220CA

Mouser Part No
576-SMAJ220CA

Littelfuse

ESD Protection Diodes / TVS Diodes 400W 220V 5% Bi-Directional

Learn More

Datasheet

8,102In Stock

Cut Tape

£0.728

£0.456

£0.295

£0.226

Reel

£0.161

View

MouseReel Available

Min.: 1
Mult.: 1

: 5,000

ESD Protection Diodes / TVS Diodes 400W 22V 5% Uni-Directional

SMAJ22A
Littelfuse
1: £0.353
43,926In Stock
28,803Expected 03/09/2026

Mfr. Part No.
SMAJ22A

Mouser Part No
576-SMAJ22A

Littelfuse

ESD Protection Diodes / TVS Diodes 400W 22V 5% Uni-Directional

Learn More

Datasheet

43,926In Stock

28,803Expected 03/09/2026

Cut Tape

£0.353

£0.16

£0.135

£0.103

Reel

£0.062

View

MouseReel Available

Min.: 1
Mult.: 1

: 5,000

ESD Protection Diodes / TVS Diodes 400W 24V 5% Uni-Directional

SMAJ24A
Littelfuse
1: £0.338
42,216In Stock
70,000Expected 26/01/2027

Mfr. Part No.
SMAJ24A

Mouser Part No
576-SMAJ24A

Littelfuse

ESD Protection Diodes / TVS Diodes 400W 24V 5% Uni-Directional

Learn More

Datasheet

42,216In Stock

70,000Expected 26/01/2027

Cut Tape

£0.338

£0.16

£0.132

£0.101

View

Reel

£0.053

MouseReel Available

Min.: 1
Mult.: 1

: 5,000

ESD Protection Diodes / TVS Diodes 400W 250V 5% Bi-Directional

SMAJ250CA
Littelfuse
1: £0.721
7,807In Stock
10,000Expected 30/11/2026

Mfr. Part No.
SMAJ250CA

Mouser Part No
576-SMAJ250CA

Littelfuse

ESD Protection Diodes / TVS Diodes 400W 250V 5% Bi-Directional

Learn More

Datasheet

7,807In Stock

10,000Expected 30/11/2026

Cut Tape

£0.721

£0.33

£0.291

£0.223

View

Reel

£0.158

MouseReel Available

Min.: 1
Mult.: 1

: 5,000

ESD Protection Diodes / TVS Diodes 400W 26V 5% Bi-Directional

SMAJ26CA
Littelfuse
1: £0.346
27,104In Stock
40,000Expected 31/08/2026

Mfr. Part No.
SMAJ26CA

Mouser Part No
576-SMAJ26CA

Littelfuse

ESD Protection Diodes / TVS Diodes 400W 26V 5% Bi-Directional

Learn More

Datasheet

27,104In Stock

40,000Expected 31/08/2026

Cut Tape

£0.346

£0.169

£0.148

£0.111

Reel

£0.064

View

MouseReel Available

Min.: 1
Mult.: 1

: 5,000

ESD Protection Diodes / TVS Diodes 400W 28V 5% Bi-Directional

SMAJ28CA
Littelfuse
1: £0.361
26,922In Stock
35,000Expected 15/02/2027

Mfr. Part No.
SMAJ28CA

Mouser Part No
576-SMAJ28CA

Littelfuse

ESD Protection Diodes / TVS Diodes 400W 28V 5% Bi-Directional

Learn More

Datasheet

26,922In Stock

35,000Expected 15/02/2027

Cut Tape

£0.361

£0.16

£0.137

£0.105

View

Reel

£0.064

MouseReel Available

Min.: 1
Mult.: 1

: 5,000

ESD Protection Diodes / TVS Diodes 400W 300V 5% Bi-Directional

SMAJ300CA
Littelfuse
1: £0.646
12,657In Stock
40,000On Order

Mfr. Part No.
SMAJ300CA

Mouser Part No
576-SMAJ300CA

Littelfuse

ESD Protection Diodes / TVS Diodes 400W 300V 5% Bi-Directional

Learn More

Datasheet

12,657In Stock

40,000On Order

Cut Tape

£0.646

£0.311

£0.232

£0.19

View

Reel

£0.152

MouseReel Available

Min.: 1
Mult.: 1

: 5,000

ESD Protection Diodes / TVS Diodes 400W 30V 5% Bi-Directional

SMAJ30CA
Littelfuse
1: £0.338
98,072In Stock
147,116On Order

Mfr. Part No.
SMAJ30CA

Mouser Part No
576-SMAJ30CA

Littelfuse

ESD Protection Diodes / TVS Diodes 400W 30V 5% Bi-Directional

Learn More

Datasheet

98,072In Stock

147,116On Order

Cut Tape

£0.338

£0.16

£0.141

£0.105

View

Reel

£0.061

MouseReel Available

Min.: 1
Mult.: 1

: 5,000

ESD Protection Diodes / TVS Diodes 400W 33V 5% Uni-Directional

SMAJ33A
Littelfuse
1: £0.346
35,195In Stock
85,000Expected 05/11/2026

Mfr. Part No.
SMAJ33A

Mouser Part No
576-SMAJ33A

Littelfuse

ESD Protection Diodes / TVS Diodes 400W 33V 5% Uni-Directional

Learn More

Datasheet

35,195In Stock

85,000Expected 05/11/2026

Cut Tape

£0.346

£0.156

£0.134

£0.101

Reel

£0.068

View

MouseReel Available

Min.: 1
Mult.: 1

: 5,000

ESD Protection Diodes / TVS Diodes 400W 350V 5% Uni-Directional

SMAJ350A
Littelfuse
1: £0.661
8,400In Stock

Mfr. Part No.
SMAJ350A

Mouser Part No
576-SMAJ350A

Littelfuse

ESD Protection Diodes / TVS Diodes 400W 350V 5% Uni-Directional

Learn More

Datasheet

8,400In Stock

Cut Tape

£0.661

£0.33

£0.275

£0.207

View

Reel

£0.147

MouseReel Available

Min.: 1
Mult.: 1

: 5,000

ESD Protection Diodes / TVS Diodes 400W 36V 5% Uni-Directional

SMAJ36A
Littelfuse
1: £0.338
42,782In Stock
25,000Expected 03/12/2026

Mfr. Part No.
SMAJ36A

Mouser Part No
576-SMAJ36A

Littelfuse

ESD Protection Diodes / TVS Diodes 400W 36V 5% Uni-Directional

Learn More

Datasheet

42,782In Stock

25,000Expected 03/12/2026

Cut Tape

£0.338

£0.16

£0.132

£0.101

Reel

£0.061

View

MouseReel Available

Min.: 1
Mult.: 1

: 5,000

ESD Protection Diodes / TVS Diodes 400W 40V 5% Uni-Directional

SMAJ40A
Littelfuse
1: £0.24
41,231In Stock

Mfr. Part No.
SMAJ40A

Mouser Part No
576-SMAJ40A

Littelfuse

ESD Protection Diodes / TVS Diodes 400W 40V 5% Uni-Directional

Learn More

Datasheet

41,231In Stock

Cut Tape

£0.24

£0.156

£0.117

£0.095

Reel

£0.058

View

MouseReel Available

Min.: 1
Mult.: 1

: 5,000

ESD Protection Diodes / TVS Diodes 400W 40V 5% Bi-Directional

SMAJ40CA
Littelfuse
1: £0.383
74,984In Stock
120,000Expected 16/11/2026

Mfr. Part No.
SMAJ40CA

Mouser Part No
576-SMAJ40CA

Littelfuse

ESD Protection Diodes / TVS Diodes 400W 40V 5% Bi-Directional

Learn More

Datasheet

74,984In Stock

120,000Expected 16/11/2026

Cut Tape

£0.383

£0.169

£0.147

£0.111

View

Reel

£0.064

MouseReel Available

Min.: 1
Mult.: 1

: 5,000

ESD Protection Diodes / TVS Diodes 400W 5V 5% Bi-Directional

SMAJ5.0CA
Littelfuse
1: £0.346
51,657In Stock
135,000On Order

Mfr. Part No.
SMAJ5.0CA

Mouser Part No
576-SMAJ5.0CA

Littelfuse

ESD Protection Diodes / TVS Diodes 400W 5V 5% Bi-Directional

Learn More

Datasheet

51,657In Stock

135,000On Order

Cut Tape

£0.346

£0.16

£0.128

£0.105

View

Reel

£0.065

MouseReel Available

Min.: 1
Mult.: 1

: 5,000

ESD Protection Diodes / TVS Diodes 400W 51V 5% Uni-Directional

SMAJ51A
Littelfuse
1: £0.346
23,322In Stock
35,000Expected 18/01/2027

Mfr. Part No.
SMAJ51A

Mouser Part No
576-SMAJ51A

Littelfuse

ESD Protection Diodes / TVS Diodes 400W 51V 5% Uni-Directional

Learn More

Datasheet

23,322In Stock

35,000Expected 18/01/2027

Cut Tape

£0.346

£0.156

£0.134

£0.101

Reel

£0.059

View

MouseReel Available

Min.: 1
Mult.: 1

: 5,000

ESD Protection Diodes / TVS Diodes 400W 58V 5% Bi-Directional

SMAJ58CA
Littelfuse
1: £0.361
102,521In Stock

Mfr. Part No.
SMAJ58CA

Mouser Part No
576-SMAJ58CA

Littelfuse

ESD Protection Diodes / TVS Diodes 400W 58V 5% Bi-Directional

Learn More

Datasheet

102,521In Stock

Cut Tape

£0.361

£0.16

£0.141

£0.105

View

Reel

£0.061

MouseReel Available

Min.: 1
Mult.: 1

: 5,000

ESD Protection Diodes / TVS Diodes 400W 6V 5% Uni-Directional

SMAJ6.0A
Littelfuse
1: £0.263
58,282In Stock
35,000Expected 04/03/2027

Mfr. Part No.
SMAJ6.0A

Mouser Part No
576-SMAJ6.0A

Littelfuse

ESD Protection Diodes / TVS Diodes 400W 6V 5% Uni-Directional

Learn More

Datasheet

58,282In Stock

35,000Expected 04/03/2027

Cut Tape

£0.263

£0.152

£0.113

£0.091

Reel

£0.058

View

MouseReel Available

Min.: 1
Mult.: 1

: 5,000

ESD Protection Diodes / TVS Diodes 400W 6.5V 5% Uni-Directional

SMAJ6.5A
Littelfuse
1: £0.33
20,680In Stock

Mfr. Part No.
SMAJ6.5A

Mouser Part No
576-SMAJ6.5A

Littelfuse

ESD Protection Diodes / TVS Diodes 400W 6.5V 5% Uni-Directional

Learn More

Datasheet

20,680In Stock

Cut Tape

£0.33

£0.155

£0.12

£0.093

£0.088

Reel

£0.088

MouseReel Available

Min.: 1
Mult.: 1

: 5,000

ESD Protection Diodes / TVS Diodes 400W 60V 5% Bi-Directional

SMAJ60CA
Littelfuse
1: £0.353
16,982In Stock
65,000On Order

Mfr. Part No.
SMAJ60CA

Mouser Part No
576-SMAJ60CA

Littelfuse

ESD Protection Diodes / TVS Diodes 400W 60V 5% Bi-Directional

Learn More

Datasheet

16,982In Stock

65,000On Order

Cut Tape

£0.353

£0.169

£0.142

£0.11

Reel

£0.064

View

MouseReel Available

Min.: 1
Mult.: 1

: 5,000

ESD Protection Diodes / TVS Diodes 400W 64V 5% Uni-Directional

SMAJ64A
Littelfuse
1: £0.353
34,245In Stock

Mfr. Part No.
SMAJ64A

Mouser Part No
576-SMAJ64A

Littelfuse

ESD Protection Diodes / TVS Diodes 400W 64V 5% Uni-Directional

Learn More

Datasheet

34,245In Stock

Cut Tape

£0.353

£0.16

£0.135

£0.105

Reel

£0.057

View

MouseReel Available

Min.: 1
Mult.: 1

: 5,000

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

SMF13A-T13
Littelfuse
1: £0.39
20,330In Stock

Mfr. Part No.
SMF13A-T13

Mouser Part No
576-SMF13A-T13

Littelfuse

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

Learn More

Datasheet

20,330In Stock

Cut Tape

£0.39

£0.179

£0.153

£0.12

Reel

£0.072

£0.067

MouseReel Available

Min.: 1
Mult.: 1

: 10,000

ESD Protection Diodes / TVS Diodes SMF - CA 13V

SMF13CA
Littelfuse
1: £0.443
32,965In Stock

Mfr. Part No.
SMF13CA

Mouser Part No
576-SMF13CA

Littelfuse

ESD Protection Diodes / TVS Diodes SMF - CA 13V

Learn More

Datasheet

32,965In Stock

Cut Tape

£0.443

£0.217

£0.172

£0.14

Reel

£0.095

View

MouseReel Available

Min.: 1
Mult.: 1

: 3,000

ESD Protection Diodes / TVS Diodes SMF - CA 15V

SMF15CA
Littelfuse
1: £0.443
61,284In Stock
48,000Expected 28/12/2026

Mfr. Part No.
SMF15CA

Mouser Part No
576-SMF15CA

Littelfuse

ESD Protection Diodes / TVS Diodes SMF - CA 15V

Learn More

Datasheet

61,284In Stock

48,000Expected 28/12/2026

Cut Tape

£0.443

£0.204

£0.172

£0.135

Reel

£0.085

View

MouseReel Available

Min.: 1
Mult.: 1

: 3,000

ESD Protection Diodes / TVS Diodes 200W 16V 5% Uni-directional

SMF16A
Littelfuse
1: £0.39
28,305In Stock

Mfr. Part No.
SMF16A

Mouser Part No
576-SMF16A

Littelfuse

ESD Protection Diodes / TVS Diodes 200W 16V 5% Uni-directional

Learn More

Datasheet

28,305In Stock

Cut Tape

£0.39

£0.179

£0.153

£0.117

Reel

£0.069

View

MouseReel Available

Min.: 1
Mult.: 1

: 3,000

Smart Thermostat Solutions

Types of Circuit Protection

Customer Service Office

Company

Resources

Support