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

129 of 999+
  • RS Stock No. 230-1075
  • Mfr. Part No. 264744 PLG4-C10/1N
Each
£10.40
Better World
  • RS Stock No. 196-3633
  • Mfr. Part No. 5SY6502-7
Each
£30.38
Better World
  • RS Stock No. 746-7801
  • Mfr. Part No. 2CDS254001R0164 S204-C16
Each
£155.20
  • RS Stock No. 563-722A
Each (In a Pack of 100)
£0.231
  • RS Stock No. 323-8999
  • Mfr. Part No. GB2CD06
Each
£47.67
  • RS Stock No. 255-622
  • Mfr. Part No. 266645 NZM2-XS-R
Each
£149.66
Better World
  • RS Stock No. 131-949
  • Mfr. Part No. 2CDS272001R0984 S202M-C0,5
Each
£60.88
  • RS Stock No. 273-2318
  • Mfr. Part No. 140MT-C-UXN
Each
£34.64
  • RS Stock No. 911-3552
Each (In a Pack of 10)
£0.246
  • RS Stock No. 537-1256
  • Mfr. Part No. S500-400-R
Each (In a Pack of 10)
£0.312
  • RS Stock No. 782-8035
  • Mfr. Part No. W54-XB1A4A10-5
Each
£4.37
  • RS Stock No. 174-0821
  • Mfr. Part No. RF2926-000
Each (In a Pack of 100)
£0.441
  • RS Stock No. 178-1101
  • Mfr. Part No. R1019260 / BTIA69V20M32
Each (In a Pack of 10)
£10.161
  • RS Stock No. 535-6099
  • Mfr. Part No. 2CDS273001R0165 S203M-B16
Each
£79.86
Better World
  • RS Stock No. 791-3363
  • Mfr. Part No. A9F54250
Each
£86.87
  • RS Stock No. 769-0007
  • Mfr. Part No. 0234003.MXP
Each (In a Pack of 25)
£0.775
  • RS Stock No. 153-2966
  • Mfr. Part No. 7TCA083120R0011 RB005
Each (In a Pack of 10)
£13.109
  • RS Stock No. 610-9995
Each (In a Pack of 10)
£0.409
  • RS Stock No. 914-4395
  • Mfr. Part No. ATMR2
Each
£18.98
  • RS Stock No. 286-0190
  • Mfr. Part No. 2828000000
Each (In a Pack of 10)
£4.932
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