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.

50914 Products showing for Fuses & Circuit Breakers

188 of 999+
  • RS Stock No. 124-2500
  • Mfr. Part No. 7TCA083670R0676 LK243-6
Each
£198.99(exc. VAT)
Better World
  • RS Stock No. 527-9526
  • Mfr. Part No. 2CDS251001R0501 S201-D50
Each
£17.64(exc. VAT)
Better World
  • RS Stock No. 211-2447
  • Mfr. Part No. M9F43220
Each
£119.69(exc. VAT)
  • RS Stock No. 173-8064
  • Mfr. Part No. 8020.5068.G
1 Box of 1000
£352.98(exc. VAT)
  • RS Stock No. 820-7259
  • Mfr. Part No. LPHV0001Z
Each
£14.44(exc. VAT)
  • RS Stock No. 186-6362
1 Kit(s)
£103.21(exc. VAT)
  • RS Stock No. 207-257
  • Mfr. Part No. SE125A12
Each
£168.56(exc. VAT)
  • RS Stock No. 738-3150
  • Mfr. Part No. 0KLK030.T
Each
£19.01(exc. VAT)
  • RS Stock No. 260-7931
  • Mfr. Part No. C25N3
Each
£556.41(exc. VAT)
Better World
  • RS Stock No. 211-2377
  • Mfr. Part No. M9F22340
Each
£131.78(exc. VAT)
  • RS Stock No. 252-910
  • Mfr. Part No. 20D16R FUSE 20A DI/E16 GR 500VAC
1 Pack of 10
£38.94(exc. VAT)
Better World
  • RS Stock No. 270-4056
  • Mfr. Part No. 3VA2116-0HM46-0AA0
Each
£1,539.91(exc. VAT)
  • RS Stock No. 721-1594
Each (In a Pack of 10)
£1.082(exc. VAT)
  • RS Stock No. 396-308
  • Mfr. Part No. 5SB251
Each (In a Pack of 5)
£1.076(exc. VAT)
  • RS Stock No. 210-6956
  • Mfr. Part No. 3NE1021-2
Each (In a Pack of 3)
£106.353(exc. VAT)
  • RS Stock No. 259-022
  • Mfr. Part No. 278909 FAZ-K10/3
Each
£125.85(exc. VAT)
Better World
  • RS Stock No. 772-1274
  • Mfr. Part No. 5SY4132-8
Each
£19.77(exc. VAT)
  • RS Stock No. 703-8807
  • Mfr. Part No. 500NHG3B-690
Each
£25.42(exc. VAT)
  • RS Stock No. 654-672
  • Mfr. Part No. R9R22225
Each
£78.00(exc. VAT)
Better World
  • RS Stock No. 219-9239
  • Mfr. Part No. A9F92202
Each
£183.26(exc. VAT)
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