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

131 of 999+
  • RS Stock No. 177-8093
Each (In a Pack of 20)
£0.462
  • RS Stock No. 418-748
  • Mfr. Part No. SSD20
Each (In a Pack of 5)
£2.486
Better World
  • RS Stock No. 236-6627
  • Mfr. Part No. 1SDA068169R1 XT2S 160 BLOC FF
Each
£186.97
  • RS Stock No. 180-6117
  • Mfr. Part No. 0 133 08
Each (In a Box of 10)
£1.818
  • RS Stock No. 413-800
1 Pack of 10
£43.73
  • RS Stock No. 768-6125
  • Mfr. Part No. 5021526.20
Each
£12.89
  • RS Stock No. 124-3109
  • Mfr. Part No. 3RV2927-5AA00
Each
£3.88
  • RS Stock No. 237-5260
Each
£5.26
Better World
  • RS Stock No. 328-343
  • Mfr. Part No. 5SL6010-7KL
Each
£46.10
  • RS Stock No. 541-4353
  • Mfr. Part No. 0217.630MXP
Each (In a Pack of 10)
£0.338
  • RS Stock No. 156-8872
  • Mfr. Part No. 10CT
Each (In a Pack of 5)
£7.482
Better World
  • RS Stock No. 790-9187
  • Mfr. Part No. A9E18038
Each
£33.69
  • RS Stock No. 541-4347A
  • Mfr. Part No. 0217.500MXP
Each (In a Pack of 100)
£0.09
  • RS Stock No. 272-7215
  • Mfr. Part No. 106137 PKZ0-XRH-MCC
Each
£65.78
  • RS Stock No. 703-8633
  • Mfr. Part No. 35NHG000B
Each
£7.75
  • RS Stock No. 541-4195
  • Mfr. Part No. 0218.200MXP
Each (In a Pack of 10)
£1.311
Better World
  • RS Stock No. 219-9151
  • Mfr. Part No. M9F42110
Each
£107.78
Better World
  • RS Stock No. 188-4740
  • Mfr. Part No. GV3P80
Each
£405.56
  • RS Stock No. 847-3285
  • Mfr. Part No. 102170 FAZ-C16/2-NA
Each
£83.52
  • RS Stock No. 852-7121
  • Mfr. Part No. MDL-12-R
Each
£3.36
Results per page