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

164 of 999+
  • RS Stock No. 203-2026
  • Mfr. Part No. 3NA7814
Each (In a Pack of 3)
£4.82
  • RS Stock No. 188-7353
  • Mfr. Part No. Q217686
Each (In a Pack of 10)
£2.316
  • RS Stock No. 769-3766
  • Mfr. Part No. 0FLQ010.T
Each
£25.12
  • RS Stock No. 630-815
  • Mfr. Part No. J085407Q
1 Box of 10
£11.20
  • RS Stock No. 177-8092
Each (In a Pack of 50)
£0.345
  • RS Stock No. 746-8179
  • Mfr. Part No. 2CDS273001R0101 S203M-D10
Each
£87.60
  • RS Stock No. 337-2005
  • Mfr. Part No. 3101.0035
Each (In a Pack of 5)
£3.26
Better World
  • RS Stock No. 232-0343
  • Mfr. Part No. 2CSS255101R0134 SN201-C13
Each
£33.49
Better World
  • RS Stock No. 482-590
  • Mfr. Part No. DF142V
Each
£47.30
Better World
  • RS Stock No. 514-0232
  • Mfr. Part No. 2CDS253001R0487 S203-K20
Each
£99.11
  • RS Stock No. 270-5266
  • Mfr. Part No. 278757 FAZ-C12/2
Each
£113.29
  • RS Stock No. 183-3622
  • Mfr. Part No. 2CDS242701R0164
Each
£31.94
  • RS Stock No. 247-2981
  • Mfr. Part No. Z302794
1 Box of 10
£75.58
  • RS Stock No. 539-1575
  • Mfr. Part No. 1SKP808142C0059 EPB25-308 CUK
Each
£402.05
  • RS Stock No. 125-987
  • Mfr. Part No. 172533 NZM3-XTVDKLR
Each
£271.89
  • RS Stock No. 174-0871
  • Mfr. Part No. RF2567-000
Each (In a Pack of 20)
£0.216
  • RS Stock No. 157-825
  • Mfr. Part No. 3VA9908-0BB24
Each
£80.09
  • RS Stock No. 189-5332
  • Mfr. Part No. X1062689 / CMC81I
Each
£10.44
  • RS Stock No. 293-8222
  • Mfr. Part No. 0 123 20
Each (In a Pack of 10)
£1.361
  • RS Stock No. 272-7477
  • Mfr. Part No. LV432598T
Each
£194.47
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