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.

50957 Products showing for Fuses & Circuit Breakers

106 of 999+
Better World
  • RS Stock No. 539-8245
  • Mfr. Part No. 2CDS211001R0204 SH201-C20
Each
£14.75
  • RS Stock No. 283-6465
  • Mfr. Part No. PTF/45
Each
£1.88
  • RS Stock No. 768-3756
  • Mfr. Part No. A331016
Each
£13.36
  • RS Stock No. 258-6365
  • Mfr. Part No. HC82AY-1
Each (In a Pack of 10)
£0.653
Better World
  • RS Stock No. 489-6675
  • Mfr. Part No. 5SY6132-6
Each
£15.87
  • RS Stock No. 777-7485
  • Mfr. Part No. 0034.3110
Each (In a Pack of 10)
£0.609
  • RS Stock No. 267-1716
  • Mfr. Part No. 1324401
Each
£14.31
  • RS Stock No. 769-3744
  • Mfr. Part No. 0452005.NRL
Each (In a Pack of 5)
£1.32
  • RS Stock No. 288-8692
  • Mfr. Part No. P7525
Each (In a Pack of 10)
£0.253
Better World
  • RS Stock No. 482-881
  • Mfr. Part No. DF142
Each
£26.87
Better World
  • RS Stock No. 776-2831
  • Mfr. Part No. A9XPT920
Each
£14.52
  • RS Stock No. 247-4223
  • Mfr. Part No. 50-124-06/25A
Each
£11.54
  • RS Stock No. 703-8677
  • Mfr. Part No. 100NHG0B
Each
£8.25
  • RS Stock No. 782-8066
  • Mfr. Part No. W51-A152A1-20
Each
£5.06
  • RS Stock No. 276-8969
  • Mfr. Part No. R9PFC732
Each
£45.48
Better World
  • RS Stock No. 235-789
  • Mfr. Part No. GV2AF01
Each
£4.28
  • RS Stock No. 344-5591
  • Mfr. Part No. 0031.1081
Each (In a Pack of 5)
£3.968
  • RS Stock No. 852-7342
  • Mfr. Part No. ATC-7-1-2
Each
£0.85
  • RS Stock No. 144-4832
  • Mfr. Part No. KB463A
Each
£34.46
  • RS Stock No. 156-8771
  • Mfr. Part No. 16LCT
Each (In a Pack of 5)
£6.84
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