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.

50958 Products showing for Fuses & Circuit Breakers

147 of 999+
  • RS Stock No. 344-5642
  • Mfr. Part No. 0031.1803
Each (In a Pack of 5)
£3.628
Better World
  • RS Stock No. 535-4245
  • Mfr. Part No. 2CDS273001R0044 S203M-C4
Each
£87.94
Better World
  • RS Stock No. 790-9181
  • Mfr. Part No. A9E18033
Each
£20.89
  • RS Stock No. 490-428
  • Mfr. Part No. 236750 PXF-40/2/03-A
Each
£56.69
  • RS Stock No. 125-1473
  • Mfr. Part No. 1492-SPM2C160
Each
£42.28
  • RS Stock No. 124-3144
  • Mfr. Part No. 5ST3801
Each
£10.94
  • RS Stock No. 191-9449
  • Mfr. Part No. 2CDS252001R0061 S202-D6
Each
£49.75
  • RS Stock No. 848-4166
  • Mfr. Part No. LP-CC-6
Each
£54.06
Better World
  • RS Stock No. 269-6101
  • Mfr. Part No. EZC100H3030
Each
£210.58
  • RS Stock No. 272-0242
  • Mfr. Part No. 5ST3062
Each
£59.56
Better World
  • RS Stock No. 202-7118
  • Mfr. Part No. 5SL4116-7
Each
£17.98
  • RS Stock No. 361-8187
  • Mfr. Part No. 171530.2
Each (In a Pack of 10)
£2.343
  • RS Stock No. 455-6327
  • Mfr. Part No. 2CDS252001R0164
Each
£47.61
  • RS Stock No. 201-6953
  • Mfr. Part No. 2CSR255180R1164 DS201 C16 A30
Each
£158.75
  • RS Stock No. 260-7796
  • Mfr. Part No. C16N3
Each
£455.01
  • RS Stock No. 125-1465
  • Mfr. Part No. 1492-SPM1C500
Each
£27.04
  • RS Stock No. 668-6054
Each (In a Pack of 10)
£0.321
  • RS Stock No. 169-9407
  • Mfr. Part No. S500-500-R
1 Bag of 1000
£250.42
  • RS Stock No. 490-327
  • Mfr. Part No. 236287 PXL-C13/2
Each
£47.69
  • RS Stock No. 738-3276
  • Mfr. Part No. 0468001.NR
Each (In a Pack of 10)
£1.099
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