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

100 of 999+
  • RS Stock No. 489-4556
  • Mfr. Part No. C14G40
Each (In a Pack of 10)
£2.231
  • RS Stock No. 202-7074
  • Mfr. Part No. 5SE1325
Each (In a Pack of 10)
£15.867
  • RS Stock No. 417-026
  • Mfr. Part No. 1110-F112-P1M1-16A
Each
£17.56
  • RS Stock No. 412-863
  • Mfr. Part No. 0031.1804
Each (In a Pack of 5)
£4.97
  • RS Stock No. 893-8565
  • Mfr. Part No. 20-209-08/100A
Each (In a Pack of 3)
£19.21
  • RS Stock No. 259-654
  • Mfr. Part No. 271449 NZM1-XTVDVR-NA
Each
£97.79
  • RS Stock No. 124-5060
  • Mfr. Part No. A4-3AF
Each (In a Pack of 5)
£0.816
  • RS Stock No. 395-850
  • Mfr. Part No. 3NA6824
Each (In a Pack of 3)
£5.647
  • RS Stock No. 703-8500
  • Mfr. Part No. C10M10
Each (In a Pack of 10)
£1.208
  • RS Stock No. 176-9384
  • Mfr. Part No. SM125 A0
Each (In a Pack of 5)
£0.832
  • RS Stock No. 210-9383
  • Mfr. Part No. 3VA9387-0TB10
Each
£325.00
  • RS Stock No. 273-6416
  • Mfr. Part No. 106132 PKZ0-XH
Each
£58.58
  • RS Stock No. 848-3040
  • Mfr. Part No. GMA-6-R
Each
£0.37
  • RS Stock No. 230-1075
  • Mfr. Part No. 264744 PLG4-C10/1N
Each
£10.40
  • RS Stock No. 230-1017
  • Mfr. Part No. 177533 FAZ6-D16/1N
Each
£24.82
  • RS Stock No. 136-7786
  • Mfr. Part No. 2CSR275151R1164 DSE201 M C16 A30 - N Blue
Each
£103.00
Better World
  • RS Stock No. 212-1619
  • Mfr. Part No. 2CDS252280R0064
Each
£40.04
Better World
  • RS Stock No. 734-9652
  • Mfr. Part No. A9F75206
Each
£150.91
  • RS Stock No. 782-0918
  • Mfr. Part No. W58-XB1A4A-30
Each
£9.20
  • RS Stock No. 184-9056
  • Mfr. Part No. CPB16
Each
£3.28
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