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

156 of 999+
  • RS Stock No. 738-2980
  • Mfr. Part No. 0452007.MRL
Each (In a Pack of 10)
£1.228
  • RS Stock No. 225-6151
  • Mfr. Part No. 2CSS200911R0007 S2C-UA 24 VDC
Each
£81.91
  • RS Stock No. 269-3873
  • Mfr. Part No. 8020.5068
Each
£0.47
  • RS Stock No. 125-987
  • Mfr. Part No. 172533 NZM3-XTVDKLR
Each
£271.89
  • RS Stock No. 337-7971
  • Mfr. Part No. 155.0892.6201
Each
£9.85
  • RS Stock No. 878-3245
  • Mfr. Part No. 0498900.TXN
Each
£9.80
  • RS Stock No. 156-8614
  • Mfr. Part No. AAO32M63
Each (In a Pack of 5)
£6.588
  • RS Stock No. 769-0174
  • Mfr. Part No. 64800001009
Each (In a Pack of 25)
£0.201
  • RS Stock No. 207-2711
  • Mfr. Part No. 2905465
Each
£308.51
  • RS Stock No. 181-8886
  • Mfr. Part No. AAO4
Each
£8.84
  • RS Stock No. 787-4344
  • Mfr. Part No. 01530009Z
Each
£2.87
  • RS Stock No. 769-4618
  • Mfr. Part No. 239219 FAZ6-C20/4
Each
£140.85
  • RS Stock No. 541-3035
  • Mfr. Part No. 0313003.MXP
Each (In a Pack of 10)
£0.935
  • RS Stock No. 407-0750
  • Mfr. Part No. 8340-F410-P1M1-A3H0-2.5A
Each
£60.10
Better World
  • RS Stock No. 203-2306
  • Mfr. Part No. 5SY6306-7
Each
£73.39
  • RS Stock No. 541-3293
  • Mfr. Part No. 0251003.NRT1L
Each (In a Pack of 10)
£1.134
  • RS Stock No. 339-813
  • Mfr. Part No. SEA9BINCKIT
Each
£130.18
Better World
  • RS Stock No. 734-9197
  • Mfr. Part No. A9Q11425
Each
£310.54
  • RS Stock No. 755-2955
  • Mfr. Part No. 3RV2917-4A
Each
£12.66
Better World
  • RS Stock No. 776-3717
  • Mfr. Part No. A9R14480
Each
£254.99
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