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

698 of 999+
  • RS Stock No. 537-812
  • Mfr. Part No. R9F28116
Each
£24.42
  • RS Stock No. 162-005
  • Mfr. Part No. 5SF5068
Each
£35.43
Better World
  • RS Stock No. 211-0458
  • Mfr. Part No. KSA250FA4
Each
£314.66
Better World
  • RS Stock No. 212-0228
  • Mfr. Part No. LV429047
Each
£109.94
Better World
  • RS Stock No. 211-0498
  • Mfr. Part No. KSB160SM413
Each
£987.34
Better World
  • RS Stock No. 211-0443
  • Mfr. Part No. KSA1000AF1
Each
£25.52
  • RS Stock No. 335-015
  • Mfr. Part No. KSA630DZCH43A
Each
£2,504.79
Better World
  • RS Stock No. 219-8869
  • Mfr. Part No. KBB40ZFC5
Each (In a Pack of 10)
£2.879
  • RS Stock No. 347-164
  • Mfr. Part No. BDF26110
Each
£655.43
Better World
  • RS Stock No. 776-3228
  • Mfr. Part No. A9N61538
Each
£152.13
  • RS Stock No. 269-693
  • Mfr. Part No. 3VA5290-7GC41-0AA0
Each
£856.22
Better World
  • RS Stock No. 238-3474
  • Mfr. Part No. A9R77725
Each
£340.35
  • RS Stock No. 144-4718
  • Mfr. Part No. NFN250
Each
£143.97
  • RS Stock No. 341-208
  • Mfr. Part No. C16H6TM100
Each
£1,706.46
  • RS Stock No. 260-7916
  • Mfr. Part No. C25H3TM200
Each
£1,731.75
  • RS Stock No. 247-1880
  • Mfr. Part No. 34015
Each
£7,297.62
  • RS Stock No. 119-382
  • Mfr. Part No. LV833576SP
Each
£847.92
  • RS Stock No. 257-361
  • Mfr. Part No. 3VA5320-6EF41-2AA0
Each
£1,651.96
Better World
  • RS Stock No. 178-7905
  • Mfr. Part No. LV426979
Each
£44.31
  • RS Stock No. 791-2770
  • Mfr. Part No. A9A27001
Each (In a Pack of 10)
£1.201
Results per page