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.

50973 Products showing for Fuses & Circuit Breakers

65 of 999+
  • RS Stock No. 221-3703
1 Bag of 5
£18.79
  • RS Stock No. 563-693A
Each (In a Pack of 100)
£0.19
  • RS Stock No. 254-6252
  • Mfr. Part No. 188-K2C040
Each
£16.69
  • RS Stock No. 284-5209
  • Mfr. Part No. 0034.6603
Each (In a Pack of 10)
£0.603
  • RS Stock No. 421-738
  • Mfr. Part No. 20-001-13/125E1
Each (In a Pack of 3)
£7.80
Better World
  • RS Stock No. 231-8398
  • Mfr. Part No. 5SV4446-0
Each
£187.72
Better World
  • RS Stock No. 254-6345
  • Mfr. Part No. C16F3TM160
Each
£888.35
  • RS Stock No. 221-3712
Each (In a Pack of 10)
£5.356
  • RS Stock No. 911-3388
Each (In a Pack of 10)
£0.357
  • RS Stock No. 922-6898
  • Mfr. Part No. 102084 FAZ-C6/1-NA
Each
£35.18
  • RS Stock No. 288-7097
  • Mfr. Part No. A9F94150
Each
£99.93
  • RS Stock No. 898-1266
  • Mfr. Part No. 10C10X38GI
Each (In a Pack of 10)
£1.236
Better World
  • RS Stock No. 746-7582
  • Mfr. Part No. 2CDS252001R0635 S202-B63
Each
£48.14
  • RS Stock No. 177-8094
Each (In a Pack of 50)
£0.23
  • RS Stock No. 250-4733
  • Mfr. Part No. 2CDL210001R1009
Each
£3.66
  • RS Stock No. 769-0158
  • Mfr. Part No. 81600000005
Each (In a Pack of 5)
£2.33
  • RS Stock No. 630-879
  • Mfr. Part No. S085369Q
1 Box of 10
£14.92
Better World
  • RS Stock No. 272-937
  • Mfr. Part No. GV3P65
Each
£241.14
  • RS Stock No. 397-569
  • Mfr. Part No. 3NA6810
Each (In a Pack of 3)
£17.807
  • RS Stock No. 521-2668
Each
£17.05
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