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

699 of 999+
Better World
  • RS Stock No. 211-0374
  • Mfr. Part No. KBB40ABD4TW
Each
£90.35
  • RS Stock No. 218-8734
  • Mfr. Part No. 1492-SPM1C060-N
Each
£38.31
  • RS Stock No. 260-7907
  • Mfr. Part No. C25H32M150
Each
£1,441.76
  • RS Stock No. 377-0421
  • Mfr. Part No. Q215593
Each (In a Pack of 5)
£3.222
  • RS Stock No. 602-161
  • Mfr. Part No. NGN325
Each
£148.62
  • RS Stock No. 277-6097
  • Mfr. Part No. 550290
Each (In a Pack of 4)
£154.563
  • RS Stock No. 237-1417
  • Mfr. Part No. 2CSR275151R3164
Each
£119.81
  • RS Stock No. 729-2714
  • Mfr. Part No. 1410-G111-P2F1-S01-6.3A
Each
£10.82
  • RS Stock No. 100-574
  • Mfr. Part No. DF2101
Each
£73.81
Better World
  • RS Stock No. 212-8916
  • Mfr. Part No. 5SY7520-7
Each
£64.41
  • RS Stock No. 260-8100
  • Mfr. Part No. C40F44V400
Each
£5,904.76
  • RS Stock No. 610-306
  • Mfr. Part No. 5SY4408-5
Each
£205.83
  • RS Stock No. 250-049
  • Mfr. Part No. 3VA6580-6KQ36-2AA0
Each
£5,793.52
Better World
  • RS Stock No. 159-683
  • Mfr. Part No. 3RV2711-0DD10
Each
£126.52
  • RS Stock No. 627-042
  • Mfr. Part No. 5SG1812
1 Pack of 10
£220.29
  • RS Stock No. 188-6912
  • Mfr. Part No. Q084355
Each (In a Pack of 10)
£3.561
  • RS Stock No. 654-752
  • Mfr. Part No. A9XPC648
Each
£112.09
  • RS Stock No. 299-997
  • Mfr. Part No. 5SD7411-2
Each
£569.16
Better World
  • RS Stock No. 236-6654
  • Mfr. Part No. 1SDA068259R1 XT3N 250 TMG 80A FF
Each
£777.42
  • RS Stock No. 188-4752
  • Mfr. Part No. GV6P320F
Each
£1,383.48
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