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

39 / 999+
Better World
ABB System Pro M Compact S200 MCB, 2P, 100A Curve B
  • RS Stock No. 237-3234
  • Mfr. Part No. 2CDS252001R0825 S202-B100 6kA
Each
MYR698.23
Better World
ABB System Pro M Compact S200 MCB, 3P, 40A Curve D, 440V AC, 6 kA Breaking Capacity
  • RS Stock No. 527-9649
  • Mfr. Part No. 2CDS253001R0401 S203-D40
Each
MYR421.11
Better World
ABB Compact Home SH200 MCB, 2P, 16A Curve C, 400V AC, 400V DC, 6 kA Breaking Capacity
  • RS Stock No. 231-9656
  • Mfr. Part No. 2CDS212001R0164 SH202-C 16
1 Box of 1
MYR229.27
Better World
Schneider Electric iID RCCB, 25A, 2 Pole, 30mA
  • RS Stock No. 734-9125
  • Mfr. Part No. A9R11225
Each
MYR905.97
RS PRO 5A T Ceramic Cartridge Fuse, 6.3 x 25mm
  • RS Stock No. 174-7958
Each (In a Box of 500)
MYR1.048
Littelfuse PC Board Non Resettable Fuse, Axial 3A, 125V ac/dc
  • RS Stock No. 878-3693
  • Mfr. Part No. 0473003.MXL
Each (In a Pack of 50)
MYR5.086
RS PRO 1A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 668-5994
Each (In a Pack of 10)
MYR1.746
Better World
Schneider Electric Multi 9 C60SP MCB, 3P, 6A Curve C, 440V AC, 15 kA Breaking Capacity
  • RS Stock No. 211-2373
  • Mfr. Part No. M9F22306
Each
MYR277.42
RS PRO 5A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 610-9816
Each (In a Pack of 10)
MYR2.636
Wickmann 15A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 174-0639
  • Mfr. Part No. 0314015.MXP
Each (In a Pack of 10)
MYR3.534
ABB System Pro M Compact S200L MCB, 3P, 20A Curve C, 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 183-3663
  • Mfr. Part No. 2CDS243701R0204
Each
MYR366.20
Better World
Siemens Sentron 5SY6 MCB, 2P, 16A Curve C, 400V AC, 72V DC, 6 kA Breaking Capacity
  • RS Stock No. 196-3631
  • Mfr. Part No. 5SY6216-7
Each
MYR382.16
ABB AC Switch Disconnectors Accessories Shaft for use with Switch Disconnectors
  • RS Stock No. 259-9748
  • Mfr. Part No. 1SCA108250R1001
Each
MYR24.95
Mersen 25A Offset Tag Fuse, 9.4 x 47mm, 240V
  • RS Stock No. 209-6423
  • Mfr. Part No. K1065691 / BLST24V25
Each (In a Pack of 10)
MYR23.032
Littelfuse 10A Red Blade Car Fuse, 32V dc
  • RS Stock No. 787-4101
  • Mfr. Part No. 0287010.PXCN
Each (In a Pack of 10)
MYR1.589
RS PRO MCB, 2P, 2A Curve C, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 265-0182
Each
MYR120.19
Eaton 2A Slow-Blow Cartridge Fuse, 10 x 38mm
  • RS Stock No. 228-664
  • Mfr. Part No. C10M2 CYLINDRICAL FUSE 10 x 38 2A AM 500V AC
1 Pack of 10
MYR62.55
Wickmann 5A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 174-0256
  • Mfr. Part No. 0312005.MXP
1 Box of 1000
MYR1,346.40
Mersen 63A NH Fuse, NH00, 500V ac
  • RS Stock No. 270-3056
  • Mfr. Part No. J223016
Each
MYR54.25
Better World
Schneider Electric Acti 9 iC60H MCB, 2P, 16A Curve B, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3192
  • Mfr. Part No. A9F53216
Each
MYR584.57
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