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

711 of 999+
  • RS Stock No. 627-354
  • Mfr. Part No. 8PQ6000-7BA05
Each
£407.19
Better World
  • RS Stock No. 249-796
  • Mfr. Part No. 3VA6440-8KQ41-0AA0
Each
£4,394.74
Better World
  • RS Stock No. 245-552
  • Mfr. Part No. 3VA6210-5JT31-2AA0
Each
£1,970.06
  • RS Stock No. 259-572
  • Mfr. Part No. 278603 FAZ-K40/1
Each
£46.68
Better World
  • RS Stock No. 245-762
  • Mfr. Part No. 3VA6140-7HL31-2AA0
Each
£625.12
  • RS Stock No. 703-8734P
  • Mfr. Part No. 200NHG02B
Each (Supplied in a Box)
£9.93
  • RS Stock No. 261-433
  • Mfr. Part No. TTM500
Each
£203.23
  • RS Stock No. 230-1071
  • Mfr. Part No. 264729 PLG4-B32/1N
Each
£39.95
  • RS Stock No. 260-8176
  • Mfr. Part No. C6331M500
Each
£863.74
  • RS Stock No. 203-1988
  • Mfr. Part No. 3NA7260
Each (In a Pack of 3)
£15.973
  • RS Stock No. 249-133
  • Mfr. Part No. 3VA6610-6HN36-0AA0
Each
£4,699.73
  • RS Stock No. 241-4435
  • Mfr. Part No. 5SM2847-8
Each
£443.33
  • RS Stock No. 153-526
  • Mfr. Part No. 5SY4163-8
Each
£47.03
  • RS Stock No. 300-079
  • Mfr. Part No. 5SJ4320-8HG41
Each
£200.23
Better World
  • RS Stock No. 178-7953
  • Mfr. Part No. LV426746
Each
£1,009.29
  • RS Stock No. 231-903
  • Mfr. Part No. 119003 NZM4-XHB-DAR
Each
£465.14
  • RS Stock No. 665-088
  • Mfr. Part No. 3NC1403
1 Pack of 10
£81.19
  • RS Stock No. 541-3619
  • Mfr. Part No. 0466003.NR
Each (In a Pack of 10)
£0.314
Better World
  • RS Stock No. 328-375
  • Mfr. Part No. 5SL6010-7MF
Each
£219.73
  • RS Stock No. 182-1346
  • Mfr. Part No. LPJ-350SP
Each
£1,015.57
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