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

124 of 999+
Better World
  • RS Stock No. 211-2393
  • Mfr. Part No. M9F23204
Each
£93.14
Better World
  • RS Stock No. 187-3285
  • Mfr. Part No. 5SV1316-7KK04
Each
£140.63
  • RS Stock No. 213-2554
  • Mfr. Part No. 5ST3607
Each (In a Pack of 10)
£5.565
  • RS Stock No. 825-5876
  • Mfr. Part No. P1MB3PD04
Each
£80.04
Better World
  • RS Stock No. 790-9373
  • Mfr. Part No. A9D11845
Each
£148.47
  • RS Stock No. 167-7774
  • Mfr. Part No. 0034.1522
Each (In a Pack of 10)
£0.325
  • RS Stock No. 289-1623
  • Mfr. Part No. 2CSM264353R1801
Each
£6.53
  • RS Stock No. 129-481
  • Mfr. Part No. 1207190
Each
£7.08
  • RS Stock No. 532-5146
  • Mfr. Part No. 278808 FAZ-S4/2
Each
£74.76
Better World
  • RS Stock No. 746-7753
  • Mfr. Part No. 2CDS253001R0044 S203-C4
Each
£66.63
Better World
  • RS Stock No. 790-9266
  • Mfr. Part No. A9D10806
Each
£186.85
Better World
  • RS Stock No. 790-8737
  • Mfr. Part No. A9F55432
Each
£192.46
  • RS Stock No. 848-3838
  • Mfr. Part No. GDC-5A
Each
£6.03
  • RS Stock No. 209-9419
  • Mfr. Part No. 8020.2051
Each (In a Pack of 10)
£7.212
  • RS Stock No. 703-8462
  • Mfr. Part No. C22G32
Each (In a Pack of 10)
£3.431
  • RS Stock No. 124-3140
  • Mfr. Part No. 5ST3704
Each
£21.10
  • RS Stock No. 167-7538
  • Mfr. Part No. 0034.3111
Each (In a Pack of 10)
£0.381
  • RS Stock No. 184-9033
  • Mfr. Part No. CPB1016D
Each
£4.99
  • RS Stock No. 156-8951
  • Mfr. Part No. 45FE
Each
£20.05
Better World
  • RS Stock No. 746-7592
  • Mfr. Part No. 2CDS253001R0205 S203-B20
Each
£62.50
Results per page