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

107 of 999+
  • RS Stock No. 197-9503
  • Mfr. Part No. 0031.3911
Each (In a Pack of 5)
£4.03
  • RS Stock No. 541-3647
  • Mfr. Part No. 0452003.MRL
Each (In a Pack of 10)
£1.685
  • RS Stock No. 125-1463
  • Mfr. Part No. 1492-SPM1C320
Each
£22.20
  • RS Stock No. 218-8795
  • Mfr. Part No. 1492-SPM2C050
Each
£44.09
  • RS Stock No. 849-5649
  • Mfr. Part No. BK-GMD-1-5-R
Each
£1.01
  • RS Stock No. 125-1547
  • Mfr. Part No. 189-AR3
Each
£18.13
  • RS Stock No. 922-7037
  • Mfr. Part No. 278580 FAZ-D10/1
Each
£23.96
  • RS Stock No. 124-5058
  • Mfr. Part No. A2-3AF
Each (In a Pack of 5)
£0.742
  • RS Stock No. 538-3833
  • Mfr. Part No. 2CDE283001R0100 E203/100R
Each
£66.20
  • RS Stock No. 911-3423
Each (In a Pack of 10)
£0.357
  • RS Stock No. 521-2630
Each (In a Pack of 5)
£9.108
  • RS Stock No. 182-1505
  • Mfr. Part No. 125NHG1B-690
Each (In a Box of 3)
£8.427
  • RS Stock No. 288-7082
  • Mfr. Part No. A9F93106
Each
£36.11
  • RS Stock No. 787-4151
  • Mfr. Part No. 0297020.WXNV
Each (In a Pack of 10)
£0.211
  • RS Stock No. 125-1494
  • Mfr. Part No. 1492-SPM1D020
Each
£19.92
  • RS Stock No. 773-3542
  • Mfr. Part No. LPJ-20SP
Each
£64.41
  • RS Stock No. 847-3153
  • Mfr. Part No. 278848 FAZ-B20/3
Each
£95.22
  • RS Stock No. 379-274
  • Mfr. Part No. 1331.0044
Each (In a Pack of 20)
£1.204
  • RS Stock No. 252-2153
Each (In a Pack of 50)
£0.263
  • RS Stock No. 563-334A
Each (In a Pack of 100)
£0.234
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