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

Circuit Protection

Circuit Protection devices and components are available at Mouser Electronics from industry leading manufacturers. Mouser is an authorized distributor for many circuit protection manufacturers including Analog Devices, Bourns, Eaton, Phoenix Contact, TDK EPCOS, Littelfuse, Vishay, & more.
More...

Please view our selection of circuit protection devices below.

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

Types of Circuit Protection

List Images

Results: 359,447

Search within results

In Stock

Normally Stocked

Active

New Products

RoHS Compliant

Filter by

.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 #

Industrial Surge Protectors SFP2-1S-1-5A-120AC-UT

1292315
Phoenix Contact
1: £161.62
5In Stock
New Product

Mfr. Part No.
1292315

Mouser Part No
651-1292315

New Product

Phoenix Contact

Industrial Surge Protectors SFP2-1S-1-5A-120AC-UT

Learn More

Datasheet

5In Stock

£161.62

Min.: 1
Mult.: 1

ESD Protection Diodes / TVS Diodes ESD 3.3V BI

CDDFN2-T3V3SC
Bourns
1: £0.315
8,400In Stock
New Product

Mfr. Part No.
CDDFN2-T3V3SC

Mouser Part No
652-CDDFN2-T3V3SC

New Product

Bourns

ESD Protection Diodes / TVS Diodes ESD 3.3V BI

Learn More

Datasheet

8,400In Stock

Cut Tape

£0.315

£0.218

£0.107

£0.089

Reel

£0.039

View

MouseReel Available

Min.: 1
Mult.: 1

: 12,000

ESD Protection Diodes / TVS Diodes ESD 5V UNI

CDDFN2-T5V0SC
Bourns
1: £0.285
8,393In Stock
New Product

Mfr. Part No.
CDDFN2-T5V0SC

Mouser Part No
652-CDDFN2-T5V0SC

New Product

Bourns

ESD Protection Diodes / TVS Diodes ESD 5V UNI

Learn More

Datasheet

8,393In Stock

Cut Tape

£0.285

£0.198

£0.097

£0.081

Reel

£0.038

View

MouseReel Available

Min.: 1
Mult.: 1

: 12,000

Industrial & Electrical Fuses POWrFuse BD 1000Vdc 600A

PF-1NH100E600B2
Bourns
1: £273.86
4In Stock
New Product

Mfr. Part No.
PF-1NH100E600B2

Mouser Part No
652-PF-1NH100E600B2

New Product

Bourns

Industrial & Electrical Fuses POWrFuse BD 1000Vdc 600A

Learn More

Datasheet

4In Stock

£273.86

£217.76

£200.68

Min.: 1
Mult.: 1

NTC (Negative Temperature Coefficient) Thermistors Glass Encapsulated NTC Thermistor, Probe, Surface Mount 15K4

20012616-00
TE Connectivity
1: £286.93
1In Stock
New Product

Mfr. Part No.
20012616-00

Mouser Part No
571-20012616-00

New Product

TE Connectivity

NTC (Negative Temperature Coefficient) Thermistors Glass Encapsulated NTC Thermistor, Probe, Surface Mount 15K4

Learn More

Datasheet

1In Stock

£286.93

£230.25

£228.17

View

Min.: 1
Mult.: 1

NTC (Negative Temperature Coefficient) Thermistors Assembly Probe KT1 Type R25=10kOhms 5% Temp. Range -30 to 80

KTEC-41-KT1
Shibaura Electronics
1: £3.79
100In Stock
New Product

Mfr. Part No.
KTEC-41-KT1

Mouser Part No
603-KTEC-41-KT1

New Product

Shibaura Electronics

NTC (Negative Temperature Coefficient) Thermistors Assembly Probe KT1 Type R25=10kOhms 5% Temp. Range -30 to 80

Learn More

Datasheet

100In Stock

£3.79

£3.46

£2.92

£2.81

View

Min.: 1
Mult.: 1

NTC (Negative Temperature Coefficient) Thermistors Assembly Probe KTM1 Type R25=10kOhms 2% Temp. Range -30 to 100

KTM-41-KTM1
Shibaura Electronics
1: £4.55
90In Stock
New Product

Mfr. Part No.
KTM-41-KTM1

Mouser Part No
603-KTM-41-KTM1

New Product

Shibaura Electronics

NTC (Negative Temperature Coefficient) Thermistors Assembly Probe KTM1 Type R25=10kOhms 2% Temp. Range -30 to 100

Learn More

Datasheet

90In Stock

£4.55

£4.15

£3.52

£3.37

View

Min.: 1
Mult.: 1

NTC (Negative Temperature Coefficient) Thermistors Assembly Probe CE1 Type R25=10kOhms 3% Temp. Range -30 to 80

PTC-43C-CE1
Shibaura Electronics
1: £4.55
100In Stock
New Product

Mfr. Part No.
PTC-43C-CE1

Mouser Part No
603-PTC-43C-CE1

New Product

Shibaura Electronics

NTC (Negative Temperature Coefficient) Thermistors Assembly Probe CE1 Type R25=10kOhms 3% Temp. Range -30 to 80

Learn More

Datasheet

100In Stock

£4.55

£4.15

£3.52

£3.37

View

Min.: 1
Mult.: 1

ESD Protection Diodes / TVS Diodes SOD323 03V 400W BIDIR

CDSOD323-T03SC-Q
Bourns
1: £0.899
1,938In Stock
New Product

Mfr. Part No.
CDSOD323-T03SC-Q

Mouser Part No
652-CDSOD323-T03SC-Q

New Product

Bourns

ESD Protection Diodes / TVS Diodes SOD323 03V 400W BIDIR

Learn More

Datasheet

1,938In Stock

Cut Tape

£0.899

£0.563

£0.37

£0.288

Reel

£0.223

View

MouseReel Available

Min.: 1
Mult.: 1

: 3,000

ESD Protection Diodes / TVS Diodes SOD323 36V 400W BIDIR

CDSOD323-T36SC-Q
Bourns
1: £0.899
2,099In Stock
New Product

Mfr. Part No.
CDSOD323-T36SC-Q

Mouser Part No
652-CDSOD323-T36SC-Q

New Product

Bourns

ESD Protection Diodes / TVS Diodes SOD323 36V 400W BIDIR

Learn More

Datasheet

2,099In Stock

Cut Tape

£0.899

£0.563

£0.37

£0.288

Reel

£0.223

View

MouseReel Available

Min.: 1
Mult.: 1

: 3,000

Industrial & Electrical Fuses Specialty Fuses POWR-SPEED SQB ESR 1500VDC 3XL DIN 315A

ESR3XLDB0315XI
Littelfuse
1: £435.26
3In Stock
New Product

Mfr. Part No.
ESR3XLDB0315XI

Mouser Part No
576-ESR3XLDB0315XI

New Product

Littelfuse

Industrial & Electrical Fuses Specialty Fuses POWR-SPEED SQB ESR 1500VDC 3XL DIN 315A

Learn More

Datasheet

3In Stock

£435.26

£357.40

£325.32

Quote

Min.: 1
Mult.: 1

Industrial & Electrical Fuses Specialty Fuses POWR-SPEED SQB ESR 1500VDC 3XL BOLT 500A

ESR3XLUB0500XI
Littelfuse
1: £456.85
3In Stock
New Product

Mfr. Part No.
ESR3XLUB0500XI

Mouser Part No
576-ESR3XLUB0500XI

New Product

Littelfuse

Industrial & Electrical Fuses Specialty Fuses POWR-SPEED SQB ESR 1500VDC 3XL BOLT 500A

Learn More

Datasheet

3In Stock

£456.85

£388.85

£348.65

Quote

Min.: 1
Mult.: 1

ESD Protection Diodes / TVS Diodes 4V, 0.55pF, 20A, SOD882

SC4340L-01ETG
Littelfuse
1: £0.465
6,083In Stock
New Product

Mfr. Part No.
SC4340L-01ETG

Mouser Part No
576-SC4340L-01ETG

New Product

Littelfuse

ESD Protection Diodes / TVS Diodes 4V, 0.55pF, 20A, SOD882

Learn More

6,083In Stock

Cut Tape

£0.465

£0.282

£0.18

£0.149

Reel

£0.083

View

Min.: 1
Mult.: 1

: 10,000

ESD Protection Diodes / TVS Diodes "20 V, 50pF, 5A,"

SP1120-01WTG
Littelfuse
1: £0.458
7,629In Stock
New Product

Mfr. Part No.
SP1120-01WTG

Mouser Part No
576-SP1120-01WTG

New Product

Littelfuse

ESD Protection Diodes / TVS Diodes "20 V, 50pF, 5A,"

Learn More

7,629In Stock

Cut Tape

£0.458

£0.237

£0.176

£0.134

Reel

£0.07

View

Min.: 1
Mult.: 1

: 10,000

ESD Protection Diodes / TVS Diodes 4V, 0.45pF, 20A, Flipchip

SP4340L-01WTG
Littelfuse
1: £0.225
7,606In Stock
New Product

Mfr. Part No.
SP4340L-01WTG

Mouser Part No
576-SP4340L-01WTG

New Product

Littelfuse

ESD Protection Diodes / TVS Diodes 4V, 0.45pF, 20A, Flipchip

Learn More

7,606In Stock

Cut Tape

£0.225

£0.14

£0.11

£0.105

View

Reel

£0.077

Min.: 1
Mult.: 1

: 10,000

Industrial & Electrical Fuses POWrFuse BD 1000Vdc 350A

PF-01N100E350B2
Bourns
1: £250.04
6In Stock
New Product

Mfr. Part No.
PF-01N100E350B2

Mouser Part No
652-PF-01N100E350B2

New Product

Bourns

Industrial & Electrical Fuses POWrFuse BD 1000Vdc 350A

Learn More

Datasheet

6In Stock

£250.04

£207.46

£177.11

Min.: 1
Mult.: 1

Industrial & Electrical Fuses Specialty Fuses POWR-SPEED SQB ESR 1500VDC 3XL BOLT 250A

ESR3XLUB0250XI
Littelfuse
1: £392.22
3In Stock
New Product

Mfr. Part No.
ESR3XLUB0250XI

Mouser Part No
576-ESR3XLUB0250XI

New Product

Littelfuse

Industrial & Electrical Fuses Specialty Fuses POWR-SPEED SQB ESR 1500VDC 3XL BOLT 250A

Learn More

Datasheet

3In Stock

£392.22

£322.06

£293.16

Quote

Min.: 1
Mult.: 1

ESD Protection Diodes / TVS Diodes 7V & 12V 75pF 20A SOT23-3L

SC712-02HTG
Littelfuse
1: £0.978
2,084In Stock
100Expected 17/11/2026
New Product

Mfr. Part No.
SC712-02HTG

Mouser Part No
576-SC712-02HTG

New Product

Littelfuse

ESD Protection Diodes / TVS Diodes 7V & 12V 75pF 20A SOT23-3L

Learn More

Datasheet

2,084In Stock

100Expected 17/11/2026

Cut Tape

£0.978

£0.614

£0.402

£0.313

Reel

£0.243

View

MouseReel Available

Min.: 1
Mult.: 1

: 3,000

NTC (Negative Temperature Coefficient) Thermistors Assembly Probe HT1 Type R100=3.3kOhms 2.5% Temp. Range -20 to 180

PT3H-51F-HT1
Shibaura Electronics
1: £4.55
99In Stock
New Product

Mfr. Part No.
PT3H-51F-HT1

Mouser Part No
603-PT3H-51F-HT1

New Product

Shibaura Electronics

NTC (Negative Temperature Coefficient) Thermistors Assembly Probe HT1 Type R100=3.3kOhms 2.5% Temp. Range -20 to 180

Learn More

Datasheet

99In Stock

£4.55

£4.15

£3.52

£3.37

View

Min.: 1
Mult.: 1

NTC (Negative Temperature Coefficient) Thermistors Assembly Probe EP1 Type R100=3.3kOhms 5% Temp. Range -30 to 120

PT3M-51F-EP1
Shibaura Electronics
1: £4.55
49In Stock
New Product

Mfr. Part No.
PT3M-51F-EP1

Mouser Part No
603-PT3M-51F-EP1

New Product

Shibaura Electronics

NTC (Negative Temperature Coefficient) Thermistors Assembly Probe EP1 Type R100=3.3kOhms 5% Temp. Range -30 to 120

Learn More

Datasheet

49In Stock

£4.55

£4.15

£3.52

£3.37

View

Min.: 1
Mult.: 1

ESD Protection Diodes / TVS Diodes SOD323 12V 400W BIDIR

CDSOD323-T12SC-Q
Bourns
1: £0.899
2,040In Stock
New Product

Mfr. Part No.
CDSOD323-T12SC-Q

Mouser Part No
652-CDSOD323-T12SC-Q

New Product

Bourns

ESD Protection Diodes / TVS Diodes SOD323 12V 400W BIDIR

Learn More

Datasheet

2,040In Stock

Cut Tape

£0.899

£0.563

£0.37

£0.288

Reel

£0.223

View

MouseReel Available

Min.: 1
Mult.: 1

: 3,000

ESD Protection Diodes / TVS Diodes 18 V, 0.6 pF, 10 kV

AQ3118-02JTG
Littelfuse
1: £0.934
2,658In Stock
New Product

Mfr. Part No.
AQ3118-02JTG

Mouser Part No
576-AQ3118-02JTG

New Product

Littelfuse

ESD Protection Diodes / TVS Diodes 18 V, 0.6 pF, 10 kV

Learn More

Datasheet

2,658In Stock

Cut Tape

£0.934

£0.585

£0.384

£0.299

Reel

£0.207

View

MouseReel Available

Min.: 1
Mult.: 1

: 3,000

ESD Protection Diodes / TVS Diodes TVS SURF MT DO214AA - SMBJ85CA CR T&R

SMBJ85CA-E
Littelfuse
1: £0.45
2,312In Stock
New Product

Mfr. Part No.
SMBJ85CA-E

Mouser Part No
576-SMBJ85CAE

New Product

Littelfuse

ESD Protection Diodes / TVS Diodes TVS SURF MT DO214AA - SMBJ85CA CR T&R

Datasheet

2,312In Stock

Cut Tape

£0.45

£0.234

£0.175

£0.132

Reel

£0.071

£0.067

Min.: 1
Mult.: 1

: 3,000

Varistors MOV 510V 10mm 2.5KA 10% Silcn Coatng Strt Leads AEC-Q200

511KH10-AT
YAGEO
1: £0.398
2,630In Stock
400On Order
New Product

Mfr. Part No.
511KH10-AT

Mouser Part No
603-511KH10-AT

New Product

YAGEO

Varistors MOV 510V 10mm 2.5KA 10% Silcn Coatng Strt Leads AEC-Q200

Learn More

Datasheet

2,630In Stock

400On Order

£0.398

£0.245

£0.212

£0.19

View

Min.: 1
Mult.: 1

NTC (Negative Temperature Coefficient) Thermistors Assembly Probe EP1 Type R0=30kOhms 3% Temp. Range -30 to 120

PB2EP-43-EP1
Shibaura Electronics
1: £4.55
100In Stock
New Product

Mfr. Part No.
PB2EP-43-EP1

Mouser Part No
603-PB2EP-43-EP1

New Product

Shibaura Electronics

NTC (Negative Temperature Coefficient) Thermistors Assembly Probe EP1 Type R0=30kOhms 3% Temp. Range -30 to 120

Learn More

Datasheet

100In Stock

£4.55

£4.15

£3.52

£3.37

View

Min.: 1
Mult.: 1

Circuit Protection

Types of Circuit Protection

Customer Service Office

Company

Resources

Support