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

143 of 999+
  • RS Stock No. 221-3716
Each (In a Pack of 10)
£9.643
  • RS Stock No. 797-6055
  • Mfr. Part No. SF 129 R
Each (In a Pack of 10)
£0.829
  • RS Stock No. 221-689
  • Mfr. Part No. RS32PH
Each
£29.90
  • RS Stock No. 273-2274
  • Mfr. Part No. 140MT-C-AFAR01A10
Each
£14.05
  • RS Stock No. 359-5933
  • Mfr. Part No. FX0359
Each (In a Pack of 5)
£9.47
  • RS Stock No. 177-8026
Each (In a Box of 500)
£0.538
Better World
  • RS Stock No. 239-9969
  • Mfr. Part No. A9P22316
Each
£123.23
  • RS Stock No. 186-3490
  • Mfr. Part No. 2CSS255102R0201 SN201 D20-L
Each
£29.05
  • RS Stock No. 852-7275
  • Mfr. Part No. AGC-1-10-R
Each
£2.25
Better World
  • RS Stock No. 218-1795
  • Mfr. Part No. 3VA9114-0RL21
Each
£1,177.84
  • RS Stock No. 210-4760
  • Mfr. Part No. EUR180.30/2A
Each
£41.50
  • RS Stock No. 247-2941
  • Mfr. Part No. X1014573
1 Box of 10
£73.75
  • RS Stock No. 405-9264
  • Mfr. Part No. 4130-G211-K4M1-70A
Each
£38.12
  • RS Stock No. 261-417
  • Mfr. Part No. TIA32
1 Pack of 20
£171.77
  • RS Stock No. 176-9069
  • Mfr. Part No. 0853.0551
Each (In a Pack of 10)
£0.522
  • RS Stock No. 177-8100
Each (In a Pack of 20)
£0.462
  • RS Stock No. 181-8596
  • Mfr. Part No. 80MJ30-7
Each (In a Box of 10)
£33.027
  • RS Stock No. 270-3012
  • Mfr. Part No. B233451
Each (In a Box of 10)
£0.627
Better World
  • RS Stock No. 776-3073
  • Mfr. Part No. A9N18367
Each
£282.97
  • RS Stock No. 304-2079
  • Mfr. Part No. M300046
Each
£118.04
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