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.

51057 Products showing for Fuses & Circuit Breakers

579 of 999+
  • RS Stock No. 279-6768
Each (In a Pack of 10)
£0.548
  • RS Stock No. 262-585
  • Mfr. Part No. TCF15RN
1 Pack of 12
£621.86
  • RS Stock No. 237-5179
  • Mfr. Part No. 2CSR273101R1255
Each
£281.48
  • RS Stock No. 125-1532
  • Mfr. Part No. 1492-A1B1
Each
£48.81
  • RS Stock No. 200-135
  • Mfr. Part No. 2CDS271337R0588
Each
£78.46
Better World
  • RS Stock No. 219-9079
  • Mfr. Part No. DF2FN63
Each (In a Pack of 10)
£25.27
  • RS Stock No. 181-8477
  • Mfr. Part No. STD4
1 Box of 20
£50.97
  • RS Stock No. 123-382
  • Mfr. Part No. 171165 FRCMM-125/2/01-A
Each
£528.39
  • RS Stock No. 232-0087
  • Mfr. Part No. 1SDA054349R1 T5H400 FF PR221-LS 400A
Each
£1,372.65
  • RS Stock No. 922-6927
  • Mfr. Part No. 102101 FAZ-D3/1-NA
Each
£37.76
  • RS Stock No. 259-3791
  • Mfr. Part No. 1SDA071796R1
Each
£15,279.61
  • RS Stock No. 220-8921
  • Mfr. Part No. 5SA2611
Each (In a Pack of 10)
£5.242
  • RS Stock No. 738-2961
  • Mfr. Part No. 0451.100MRL
Each (In a Pack of 10)
£1.732
  • RS Stock No. 375-9698
  • Mfr. Part No. E219815
Each
£17.43
  • RS Stock No. 182-1387
  • Mfr. Part No. 170M3816D
Each (In a Box of 6)
£166.073
  • RS Stock No. 182-1425
  • Mfr. Part No. 160LET
Each (In a Box of 10)
£18.877
Better World
  • RS Stock No. 211-0354
  • Mfr. Part No. KBA25ED2303TW
Each (In a Pack of 6)
£136.885
  • RS Stock No. 377-0443
  • Mfr. Part No. G222163
Each (In a Pack of 5)
£1.446
  • RS Stock No. 110-8509
  • Mfr. Part No. 7010.7090.13
Each (In a Pack of 5)
£1.324
  • RS Stock No. 147-692
  • Mfr. Part No. 3VA5180-1MH31-0AA0
Each
£300.82
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