Fuses & Circuit Breakers

Although they work in different ways, fuses and circuit breakers broadly have the same purpose; to protect electrical appliances and electrical circuits from short circuits, and excessive current (called overcurrent or overload).

Fuses

Fuses are relatively low cost electrical safety devices. If too much current enters the circuit, the fuse will burn out (sometimes called blowing out). When the fuse blows out it breaks the circuit. This protects the attached devices and allows you to touch devices without being electrocuted. When the fuse blows, it must be replaced before using the device or appliance again.

Circuit breakers

Circuit breakers work in a similar way to fuses, but they are resettable. Once a fault is detected (this is typically a short circuit or an excessive amount of current flowing through the circuit) the circuit breaker will interrupt the flow of current. When the circuit breaker trips, it's simply a case of flicking a switch to reset the circuit breaker. As soon as you've reset the circuit breaker, it is ready to use again.

Circuit Breakers
Circuit Breakers
Earth & Lightning Protection
Earth & Lightning Protection
Fuse Holders & Accessories
Fuse Holders & Accessories
Fuses
Fuses
Fuses - PCB
Fuses - PCB

46580 Products showing for Fuses & Circuit Breakers

38 / 999+
ETI 63A D02 Neozed Fuse, E18 Thread Size, gG, 400V ac
  • RS Stock No. 416-023
  • Mfr. Part No. 2212005
Each (In a Pack of 5)
MYR6.768
Eaton 500mA F Glass Cartridge Fuse, 6.3 x 25mm
  • RS Stock No. 851-1485
  • Mfr. Part No. AGX-1-2
Each
MYR11.85
Mersen 63A British Standard Fuse, 17 x 49mm, 690V, 61 → 65.5mm
  • RS Stock No. 238-4035
  • Mfr. Part No. G220967
Each
MYR233.92
Schneider Electric R9R RCCB, 25A, 2 Pole, 30mA, Type A, 230V ac
  • RS Stock No. 654-672
  • Mfr. Part No. R9R22225
Each
MYR514.69
Littelfuse 0.5A Resettable Fuse, 13.2V dc
  • RS Stock No. 517-7240
  • Mfr. Part No. MICROSMD050F-2
Each (In a Pack of 20)
MYR1.683
Eaton 15A F Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 848-3942
  • Mfr. Part No. KTK-R-15
Each
MYR180.11
Better World
Schneider Electric Multi 9 MCB, 2P, 10A Curve D, 10 kA Breaking Capacity
  • RS Stock No. 219-9145
  • Mfr. Part No. M9F23210
Each
MYR660.57
Mersen Surge Protector
  • RS Stock No. 179-3068
  • Mfr. Part No. 83230127 / STPT23-20K275V-4PG-LFM
Each
MYR1,027.38
Siemens SENTRON 1 Phase Busbar, 18mm Pitch
  • RS Stock No. 202-7200
  • Mfr. Part No. 5ST3730
Each
MYR47.55
Eaton xEffect MCB, 2P, 16A Curve C, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 847-3282
  • Mfr. Part No. 278760 FAZ-C16/2
Each
MYR497.20
Better World
Schneider Electric Acti 9 iC60N MCB, 2P, 2A Curve D, 400V AC, 12 → 144V DC, 6 kA Breaking Capacity
  • RS Stock No. 734-9646
  • Mfr. Part No. A9F75202
Each
MYR486.65
Better World
Schneider Electric Circuit Trip
  • RS Stock No. 219-9355
  • Mfr. Part No. LV429392
Each
MYR721.30
Siemens 16A D01 Neozed Fuse, gR, 400V
  • RS Stock No. 202-7244
  • Mfr. Part No. 5SE1316
Each (In a Pack of 10)
MYR79.65
SIBA 500mA M Ceramic Cartridge Fuse, 5 x 25mm
  • RS Stock No. 267-3464
  • Mfr. Part No. 70-010-05/0.5A
Each (In a Pack of 5)
MYR34.362
Selco Thermal Fuse +152°C 10 A, 250V ac
  • RS Stock No. 111-7808
  • Mfr. Part No. SWTC-306-3535
Each (In a Pack of 10)
MYR9.76
Mersen Surge Protector
  • RS Stock No. 179-3077
  • Mfr. Part No. 83230003 / SP23-20K275V-LF
Each
MYR193.17
ABB F200 RCCB, 25A, 2 Pole, 30mA, Type AC, 230V
  • RS Stock No. 537-7355
  • Mfr. Part No. 2CSF202001R1250 F202 AC-25/0,03
Each
MYR939.60
Mersen 10A FF Cartridge Fuse, 10 x 38mm
  • RS Stock No. 136-0600
  • Mfr. Part No. A1014576 / FR10GR69V10
Each
MYR41.88
Eaton 50A Ceramic Cartridge Fuse, 14 x 51mm
  • RS Stock No. 703-8443P
  • Mfr. Part No. C14G50
Each (Supplied in a Box)
MYR10.078
ABB 24 Way Plastic Consumer Unit, 125A, IP65 Mistral65
  • RS Stock No. 811-1906
  • Mfr. Part No. 1SL1204A00 65P12X22
Each
MYR343.56
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