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

97 of 999+
  • RS Stock No. 765-2967
  • Mfr. Part No. TD00-D
Each
£22.79
  • RS Stock No. 541-4347A
  • Mfr. Part No. 0217.500MXP
Each (In a Pack of 100)
£0.09
Better World
  • RS Stock No. 746-7722
  • Mfr. Part No. 2CDS252001R0324 S202-C32
Each
£42.23
  • RS Stock No. 183-3544
  • Mfr. Part No. 236963 PXK-C13/1N/003-A
Each
£67.39
  • RS Stock No. 521-2854
Each (In a Pack of 5)
£1.92
  • RS Stock No. 914-4314
  • Mfr. Part No. ATDR1
Each
£22.10
  • RS Stock No. 231-9590
  • Mfr. Part No. 2CDE282001R0100 E202/100r
1 Box of 1
£37.49
  • RS Stock No. 537-1032
  • Mfr. Part No. S501-8-R
Each (In a Pack of 10)
£0.242
  • RS Stock No. 622-1124
  • Mfr. Part No. 5SE2350
Each (In a Pack of 10)
£1.616
  • RS Stock No. 541-3350
  • Mfr. Part No. 0451.500MRL
Each (In a Pack of 10)
£1.111
  • RS Stock No. 849-6538
  • Mfr. Part No. EUC2P1C
Each
£15.36
  • RS Stock No. 684-3591
  • Mfr. Part No. 0916607
Each
£18.05
  • RS Stock No. 182-1567
  • Mfr. Part No. 100FE
Each
£22.53
  • RS Stock No. 231-9636
  • Mfr. Part No. 2CDL220001R1612 PS2/12/16
1 Box of 1
£16.48
  • RS Stock No. 125-1506
  • Mfr. Part No. 1492-SPM2D010
Each
£47.87
Better World
  • RS Stock No. 219-9706
  • Mfr. Part No. NSYEL166D6
Each (In a Pack of 10)
£2.01
  • RS Stock No. 361-8193
  • Mfr. Part No. 171530.3,15
Each (In a Pack of 10)
£1.931
  • RS Stock No. 101-751
Each
£47.29
  • RS Stock No. 878-3249
  • Mfr. Part No. 0MID050.X
Each
£4.72
  • RS Stock No. 851-1640
  • Mfr. Part No. HPF
Each
£7.04
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