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.

50973 Products showing for Fuses & Circuit Breakers

58 of 999+
  • RS Stock No. 247-2878
  • Mfr. Part No. R218193
1 Box of 10
£12.53
Better World
  • RS Stock No. 772-1397
  • Mfr. Part No. 5SY4350-8
Each
£90.63
  • RS Stock No. 359-5955
  • Mfr. Part No. FX0296
Each (In a Pack of 5)
£7.444
  • RS Stock No. 630-834
  • Mfr. Part No. P090518Q
1 Box of 10
£4.00
  • RS Stock No. 848-2766
  • Mfr. Part No. AGC-2-R
Each
£1.55
Better World
  • RS Stock No. 243-6203
  • Mfr. Part No. 5SU1336-6FP10
Each
£261.03
Better World
  • RS Stock No. 211-2645
  • Mfr. Part No. LV429312
Each
£10.54
  • RS Stock No. 787-4300
  • Mfr. Part No. 65600001009
Each (In a Pack of 5)
£1.538
  • RS Stock No. 181-8894
  • Mfr. Part No. 10D27Q
Each
£1.61
  • RS Stock No. 769-0146
  • Mfr. Part No. 10207101009
Each (In a Pack of 5)
£0.26
  • RS Stock No. 156-8816
  • Mfr. Part No. 35LET
Each
£12.81
  • RS Stock No. 288-7083
  • Mfr. Part No. A9F93110
Each
£32.67
  • RS Stock No. 854-475
  • Mfr. Part No. 1170-21-20A
Each
£15.71
  • RS Stock No. 563-384
Each (In a Pack of 10)
£0.278
  • RS Stock No. 825-5769
  • Mfr. Part No. P1MB2PD16
Each
£44.14
  • RS Stock No. 201-6946
  • Mfr. Part No. 2CSR275180R1254 DS201 M C25 A30
Each
£133.31
  • RS Stock No. 563-609A
Each (In a Pack of 100)
£0.195
Better World
  • RS Stock No. 527-9649
  • Mfr. Part No. 2CDS253001R0401 S203-D40
Each
£65.41
  • RS Stock No. 797-6052
  • Mfr. Part No. SF 167 R
Each (In a Pack of 10)
£0.752
  • RS Stock No. 181-8902
  • Mfr. Part No. 16D27Q
Each
£1.64
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