Circuit Protection – Mouser United Kingdom

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

Ethernet ESD, Lightning, & Power Fault Protection

Littelfuse Ethernet/PoE ESD, EFT, Lightning, and Power Fault Protection ensures that the power fault overcurrent can be protected with Telelink fuses. The Ethernet Power Fault Protection includes the SMCJ and SP40 TVS Diode, SP3, SRV05xx, LC03xx, and SP40xx Diode Array, and the 0461xxx Fuse series. Littelfuse Ethernet/PoE ESD, EFT, Lightning, and Power Fault Protection products meet various applicable standards.

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

Types of Circuit Protection

List Images

Results: 308

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 #

Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 225-375V 2A GDT T/R 2 Term

SG300
Littelfuse
1: £0.969
6,135In Stock
8,000On Order

Mfr. Part No.
SG300

Mouser Part No
576-SG300

Littelfuse

Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 225-375V 2A GDT T/R 2 Term

Learn More

Datasheet

6,135In Stock

8,000On Order

Cut Tape

£0.969

£0.737

£0.611

£0.575

£0.558

Reel

£0.538

MouseReel Available

Min.: 1
Mult.: 1

: 2,000

Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 52-98V 2A GDT T/R 2 Term

SG75
Littelfuse
1: £1.07
4,917In Stock
18,000On Order

Mfr. Part No.
SG75

Mouser Part No
576-SG75

Littelfuse

Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 52-98V 2A GDT T/R 2 Term

Learn More

Datasheet

4,917In Stock

18,000On Order

Cut Tape

£1.07

£0.818

£0.69

Reel

£0.69

MouseReel Available

Min.: 1
Mult.: 1

: 2,000

Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 63-117V 2A GDT T/R 2 Term

SG90
Littelfuse
1: £1.07
4,378In Stock
6,000Expected 28/10/2026

Mfr. Part No.
SG90

Mouser Part No
576-SG90

Littelfuse

Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 63-117V 2A GDT T/R 2 Term

Learn More

Datasheet

4,378In Stock

6,000Expected 28/10/2026

Cut Tape

£1.07

£0.818

£0.678

£0.625

£0.56

Reel

£0.538

MouseReel Available

Min.: 1
Mult.: 1

: 2,000

Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GP 5X5 90V Minitube 2 Term

SL0902A090SM
Littelfuse
1: £1.71
6,308In Stock

Mfr. Part No.
SL0902A090SM

Mouser Part No
576-SL0902A090SM

Littelfuse

Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GP 5X5 90V Minitube 2 Term

Learn More

Datasheet

6,308In Stock

Cut Tape

£1.71

£1.31

£1.15

Reel

£1.15

MouseReel Available

Min.: 1
Mult.: 1

: 900

Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GP 5X5 230V Minitube 2 Term

SL0902A230SM
Littelfuse
1: £1.71
3,521In Stock

Mfr. Part No.
SL0902A230SM

Mouser Part No
576-SL0902A230SM

Littelfuse

Gas Discharge Tubes - GDTs / Gas Plasma Arrestors GP 5X5 230V Minitube 2 Term

Learn More

Datasheet

3,521In Stock

Cut Tape

£1.71

£1.31

£1.16

£0.995

Reel

£0.899

MouseReel Available

Min.: 1
Mult.: 1

: 900

ESD Protection Diodes / TVS Diodes 4 Ch 12kV 5V TVS Diode Array

SP0504SHTG
Littelfuse
1: £0.728
30,618In Stock

Mfr. Part No.
SP0504SHTG

Mouser Part No
576-SP0504SHTG

Littelfuse

ESD Protection Diodes / TVS Diodes 4 Ch 12kV 5V TVS Diode Array

Learn More

Datasheet

30,618In Stock

Cut Tape

£0.728

£0.333

£0.294

£0.226

Reel

£0.207

MouseReel Available

Min.: 1
Mult.: 1

: 3,000

ESD Protection Diodes / TVS Diodes 75A 30KV 3.3V Lightning Protection

SP2502LBTG
Littelfuse
1: £2.40
3,599In Stock
5,000Expected 16/11/2026

Mfr. Part No.
SP2502LBTG

Mouser Part No
576-SP2502LBTG

Littelfuse

ESD Protection Diodes / TVS Diodes 75A 30KV 3.3V Lightning Protection

Learn More

Datasheet

3,599In Stock

5,000Expected 16/11/2026

Cut Tape

£2.40

£1.42

£1.07

£0.899

£0.849

Reel

£0.733

MouseReel Available

Min.: 1
Mult.: 1

: 2,500

ESD Protection Diodes / TVS Diodes 2 Ch 8KV 5V .65pF Low Cap

SP3003-02UTG
Littelfuse
1: £1.05
10,875In Stock

Mfr. Part No.
SP3003-02UTG

Mouser Part No
576-SP3003-02UTG

Littelfuse

ESD Protection Diodes / TVS Diodes 2 Ch 8KV 5V .65pF Low Cap

Learn More

Datasheet

10,875In Stock

Cut Tape

£1.05

£0.545

£0.431

£0.335

Reel

£0.246

MouseReel Available

Min.: 1
Mult.: 1

: 3,000

ESD Protection Diodes / TVS Diodes 4 Ch, 12kV, 0.85pF SOT5630

SP3004-04XTG
Littelfuse
1: £0.934
5,396In Stock
6,000Expected 08/10/2026

Mfr. Part No.
SP3004-04XTG

Mouser Part No
576-SP3004-04XTG

Littelfuse

ESD Protection Diodes / TVS Diodes 4 Ch, 12kV, 0.85pF SOT5630

Datasheet

5,396In Stock

6,000Expected 08/10/2026

Cut Tape

£0.934

£0.448

£0.358

£0.285

£0.271

Reel

£0.219

MouseReel Available

Min.: 1
Mult.: 1

: 3,000

ESD Protection Diodes / TVS Diodes 0.3pF SOT23-6L 4 Ch Diode Array

SP3019-04HTG
Littelfuse
1: £0.773
12,146In Stock

Mfr. Part No.
SP3019-04HTG

Mouser Part No
576-SP3019-04HTG

Littelfuse

ESD Protection Diodes / TVS Diodes 0.3pF SOT23-6L 4 Ch Diode Array

Learn More

Datasheet

12,146In Stock

Cut Tape

£0.773

£0.362

£0.304

£0.241

£0.228

Reel

£0.192

MouseReel Available

Min.: 1
Mult.: 1

: 3,000

ESD Protection Diodes / TVS Diodes 5V 1uA 8kV BIDIRECTIONAL

SP3021-01ETG
Littelfuse
1: £0.398
12,150In Stock
10,000Expected 31/12/2026

Mfr. Part No.
SP3021-01ETG

Mouser Part No
576-SP3021-01ETG

Littelfuse

ESD Protection Diodes / TVS Diodes 5V 1uA 8kV BIDIRECTIONAL

Learn More

Datasheet

12,150In Stock

10,000Expected 31/12/2026

Cut Tape

£0.398

£0.175

£0.154

£0.115

View

Reel

£0.089

MouseReel Available

Min.: 1
Mult.: 1

: 10,000

ESD Protection Diodes / TVS Diodes 0.35pF 20kV BIDIRECTIONAL

SP3022-01ETG
Littelfuse
1: £0.443
28,191In Stock

Mfr. Part No.
SP3022-01ETG

Mouser Part No
576-SP3022-01ETG

Littelfuse

ESD Protection Diodes / TVS Diodes 0.35pF 20kV BIDIRECTIONAL

Learn More

Datasheet

28,191In Stock

Cut Tape

£0.443

£0.228

£0.181

£0.144

View

Reel

£0.089

MouseReel Available

Min.: 1
Mult.: 1

: 10,000

ESD Protection Diodes / TVS Diodes .3pF 10KV 18V SOD8820

SP3118-01ETG
Littelfuse
1: £0.443
65,601In Stock

Mfr. Part No.
SP3118-01ETG

Mouser Part No
576-SP3118-01ETG

Littelfuse

ESD Protection Diodes / TVS Diodes .3pF 10KV 18V SOD8820

Learn More

Datasheet

65,601In Stock

Cut Tape

£0.443

£0.213

£0.177

£0.141

View

Reel

£0.082

MouseReel Available

Min.: 1
Mult.: 1

: 10,000

ESD Protection Diodes / TVS Diodes 3.3V 40A AEC-Q101

SP3374NUTG
Littelfuse
1: £1.75
2,615In Stock
18,000Expected 27/08/2026

Mfr. Part No.
SP3374NUTG

Mouser Part No
576-SP3374NUTG

Littelfuse

ESD Protection Diodes / TVS Diodes 3.3V 40A AEC-Q101

Learn More

Datasheet

2,615In Stock

18,000Expected 27/08/2026

Cut Tape

£1.75

£0.899

£0.773

£0.646

£0.622

Reel

£0.622

MouseReel Available

Min.: 1
Mult.: 1

: 3,000

ESD Protection Diodes / TVS Diodes 1pF uDFN-6L 2 Ch Diode Array

SP3400-02UTG
Littelfuse
1: £0.826
26,544In Stock

Mfr. Part No.
SP3400-02UTG

Mouser Part No
576-SP3400-02UTG

Littelfuse

ESD Protection Diodes / TVS Diodes 1pF uDFN-6L 2 Ch Diode Array

Learn More

Datasheet

26,544In Stock

Cut Tape

£0.826

£0.382

£0.32

£0.243

£0.231

Reel

£0.188

MouseReel Available

Min.: 1
Mult.: 1

: 3,000

ESD Protection Diodes / TVS Diodes 0.2pF 22kV DFN-5

SP3422-04UTG
Littelfuse
1: £0.368
46,284In Stock

Mfr. Part No.
SP3422-04UTG

Mouser Part No
576-SP3422-04UTG

Littelfuse

ESD Protection Diodes / TVS Diodes 0.2pF 22kV DFN-5

Learn More

Datasheet

46,284In Stock

Cut Tape

£0.368

£0.193

£0.149

£0.126

£0.109

Reel

£0.083

MouseReel Available

Min.: 1
Mult.: 1

: 3,000

ESD Protection Diodes / TVS Diodes 2CH 5V 2A 0.2pF

SP3423-02UTG
Littelfuse
1: £0.653
8,818In Stock

Mfr. Part No.
SP3423-02UTG

Mouser Part No
576-SP3423-02UTG

Littelfuse

ESD Protection Diodes / TVS Diodes 2CH 5V 2A 0.2pF

Learn More

Datasheet

8,818In Stock

Cut Tape

£0.653

£0.343

£0.273

£0.214

£0.203

Reel

£0.163

MouseReel Available

Min.: 1
Mult.: 1

: 3,000

ESD Protection Diodes / TVS Diodes 1 Ch 22kV 9.2V .15pF SOD882

SP3522-01ETG
Littelfuse
1: £0.323
89,093In Stock

Mfr. Part No.
SP3522-01ETG

Mouser Part No
576-SP3522-01ETG

Littelfuse

ESD Protection Diodes / TVS Diodes 1 Ch 22kV 9.2V .15pF SOD882

Learn More

Datasheet

89,093In Stock

Cut Tape

£0.323

£0.151

£0.115

£0.088

View

Reel

£0.059

MouseReel Available

Min.: 1
Mult.: 1

: 10,000

ESD Protection Diodes / TVS Diodes 1 Ch 22kV 9.2V .15pF 0201 DFN

SP3522-01UTG
Littelfuse
1: £0.292
41,229In Stock

Mfr. Part No.
SP3522-01UTG

Mouser Part No
576-SP3522-01UTG

Littelfuse

ESD Protection Diodes / TVS Diodes 1 Ch 22kV 9.2V .15pF 0201 DFN

Learn More

Datasheet

41,229In Stock

Cut Tape

£0.292

£0.13

£0.112

£0.084

View

Reel

£0.048

MouseReel Available

Min.: 1
Mult.: 1

: 15,000

ESD Protection Diodes / TVS Diodes 1.3pF 12A BIDIRECTIONAL

SP4023-01FTG-C
Littelfuse
1: £0.54
11,873In Stock
36,000Expected 29/10/2026

Mfr. Part No.
SP4023-01FTG-C

Mouser Part No
576-SP4023-01FTG-C

Littelfuse

ESD Protection Diodes / TVS Diodes 1.3pF 12A BIDIRECTIONAL

Learn More

Datasheet

11,873In Stock

36,000Expected 29/10/2026

Cut Tape

£0.54

£0.385

£0.265

£0.222

Reel

£0.163

MouseReel Available

Min.: 1
Mult.: 1

: 3,000

ESD Protection Diodes / TVS Diodes 1.5pF 30kV

SP4044-04ATG
Littelfuse
1: £0.952
8,686In Stock

Mfr. Part No.
SP4044-04ATG

Mouser Part No
576-SP4044-04ATG

Littelfuse

ESD Protection Diodes / TVS Diodes 1.5pF 30kV

Learn More

Datasheet

8,686In Stock

Cut Tape

£0.952

£0.656

£0.54

£0.448

View

Reel

£0.36

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

ESD Protection Diodes / TVS Diodes 1.5pF 30kV

SP4045-04ATG
Littelfuse
1: £0.925
8,907In Stock
8,000Expected 27/08/2026

Mfr. Part No.
SP4045-04ATG

Mouser Part No
576-SP4045-04ATG

Littelfuse

ESD Protection Diodes / TVS Diodes 1.5pF 30kV

Learn More

Datasheet

8,907In Stock

8,000Expected 27/08/2026

Cut Tape

£0.925

£0.615

£0.50

£0.416

View

Reel

£0.33

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

ESD Protection Diodes / TVS Diodes 8 Ch 30kV 2.5V 4.4pF

SP4060-08ATG
Littelfuse
1: £1.35
3,802In Stock

Mfr. Part No.
SP4060-08ATG

Mouser Part No
576-SP4060-08ATG

Littelfuse

ESD Protection Diodes / TVS Diodes 8 Ch 30kV 2.5V 4.4pF

Learn More

Datasheet

3,802In Stock

Cut Tape

£1.35

£0.78

£0.623

£0.534

£0.498

Reel

£0.434

MouseReel Available

Min.: 1
Mult.: 1

: 4,000

ESD Protection Diodes / TVS Diodes 4 channels .65pF

SP3003-04XTG
Littelfuse
1: £0.978
490In Stock
9,000Expected 20/08/2026

Mfr. Part No.
SP3003-04XTG

Mouser Part No
576-SP3003-04XTG

Littelfuse

ESD Protection Diodes / TVS Diodes 4 channels .65pF

Learn More

Datasheet

490In Stock

9,000Expected 20/08/2026

Cut Tape

£0.978

£0.466

£0.402

£0.313

£0.298

Reel

£0.231

MouseReel Available

Min.: 1
Mult.: 1

: 3,000

ESD Protection Diodes / TVS Diodes 2 CH 8KV 0.5pF

SP3006-02XTG
Littelfuse
1: £0.917
600In Stock
2,500Expected 31/08/2026

Mfr. Part No.
SP3006-02XTG

Mouser Part No
576-SP3006-02XTG

Littelfuse

ESD Protection Diodes / TVS Diodes 2 CH 8KV 0.5pF

Datasheet

600In Stock

2,500Expected 31/08/2026

Cut Tape

£0.917

£0.603

£0.503

£0.407

£0.357

Reel

£0.323

MouseReel Available

Min.: 1
Mult.: 1

: 3,000

Ethernet ESD, Lightning, & Power Fault Protection

Types of Circuit Protection

Customer Service Office

Company

Resources

Support