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

141 of 999+
  • RS Stock No. 852-7159
  • Mfr. Part No. MDL-3-R
Each
£2.57
  • RS Stock No. 240-6405
  • Mfr. Part No. CPR100010A
Each
£90.86
Better World
  • RS Stock No. 209-6473
  • Mfr. Part No. 5SL4216-8
Each
£55.09
  • RS Stock No. 273-2272
  • Mfr. Part No. 140MT-C-AFA11
Each
£9.39
  • RS Stock No. 738-2968P
  • Mfr. Part No. 04611.25ER
Each (Supplied on a Reel)
£1.155
  • RS Stock No. 867-5261
  • Mfr. Part No. MINISMDC075F/24-2
Each (In a Bag of 10)
£0.354
  • RS Stock No. 218-8698
  • Mfr. Part No. 1492-SPM1B030-N
Each
£34.08
  • RS Stock No. 894-9593
  • Mfr. Part No. 04773.15MXP
Each (In a Pack of 5)
£1.516
  • RS Stock No. 712-5272
  • Mfr. Part No. 2800186
Each
£298.48
  • RS Stock No. 125-1531
  • Mfr. Part No. 1492-SPM3D630
Each
£143.42
Better World
  • RS Stock No. 219-9280
  • Mfr. Part No. A9F94240
Each
£108.83
  • RS Stock No. 782-8035
  • Mfr. Part No. W54-XB1A4A10-5
Each
£4.37
Better World
  • RS Stock No. 806-7332
  • Mfr. Part No. A9R21225
Each
£197.81
  • RS Stock No. 204-264
  • Mfr. Part No. 2CDS253001R0338
Each
£139.14
  • RS Stock No. 182-1683
  • Mfr. Part No. CHM3DIU
Each
£23.61
Better World
  • RS Stock No. 212-8825
  • Mfr. Part No. 5SY4113-8
Each
£20.36
  • RS Stock No. 125-1422
  • Mfr. Part No. 1492-SPM1B100
Each
£16.59
  • RS Stock No. 209-9305
1 Pack of 10
£20.90
Better World
  • RS Stock No. 214-2057
  • Mfr. Part No. M9F11106
Each
£28.01
  • RS Stock No. 396-083
  • Mfr. Part No. 3NA3140
Each (In a Pack of 3)
£12.087
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