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.

51057 Products showing for Fuses & Circuit Breakers

621 of 999+
  • RS Stock No. 262-187
  • Mfr. Part No. 315NHG03BI NH FUSE 315A 500V GL/GG SIZE 03
1 Pack of 3
£39.76
  • RS Stock No. 169-9504
  • Mfr. Part No. SR-5-500MA-BK
Each (In a Bag of 200)
£1.068
  • RS Stock No. 260-7470
  • Mfr. Part No. C10V42D040
Each
£1,500.77
  • RS Stock No. 205-370
  • Mfr. Part No. A9C61210
Each
£647.24
Better World
  • RS Stock No. 211-9638
  • Mfr. Part No. 5SV3342-3
Each
£233.03
  • RS Stock No. 152-944
  • Mfr. Part No. 3NA3230-4KK01
Each
£121.02
  • RS Stock No. 269-7149
  • Mfr. Part No. 3VA9233-0QA00
Each (In a Pack of 3)
£21.07
  • RS Stock No. 272-7578
  • Mfr. Part No. TA10D2L0633TPE
Each
£1,054.94
  • RS Stock No. 174-7958
Each (In a Box of 500)
£0.188
  • RS Stock No. 259-3781
  • Mfr. Part No. 1SDA071787R1
Each
£16,766.28
  • RS Stock No. 243-270
  • Mfr. Part No. 16GN02 GAUGE PIECE DO2 16A 400V FOR E18
1 Pack of 50
£42.52
  • RS Stock No. 216-4285
  • Mfr. Part No. 7093.0110
Each
£97.10
Better World
  • RS Stock No. 209-6616
  • Mfr. Part No. 5SL4106-7
Each
£19.92
  • RS Stock No. 849-5932
  • Mfr. Part No. KTK-20
Each
£31.75
  • RS Stock No. 729-2859
  • Mfr. Part No. 3600-P10-Si-15A
Each
£70.93
  • RS Stock No. 219-9022
  • Mfr. Part No. A9N18591
Each
£1,079.10
Better World
  • RS Stock No. 219-9242
  • Mfr. Part No. A9F92210
Each
£379.51
  • RS Stock No. 213-2420
  • Mfr. Part No. 8US1251-5DS11
Each
£33.72
  • RS Stock No. 171-6768
  • Mfr. Part No. S505H-6.3-R
Each (In a Pack of 5)
£0.502
  • RS Stock No. 252-821
  • Mfr. Part No. 215621 RVS-3PHAS+N/150
1 Pack of 3
£15.76
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