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

721 of 999+
  • RS Stock No. 218-8779
  • Mfr. Part No. 1492-SPM1D400-N
Each
£43.73
  • RS Stock No. 210-6944
  • Mfr. Part No. 3NA7814-6
Each (In a Pack of 3)
£28.213
  • RS Stock No. 552-322
  • Mfr. Part No. 913-007
1 Bag of 500
£406.49
  • RS Stock No. 231-191
  • Mfr. Part No. 107611 NZMB2-AF15-BT-NA
Each
£456.63
Better World
  • RS Stock No. 254-6310
  • Mfr. Part No. C11B4TM100L
Each
£412.37
  • RS Stock No. 260-7610
  • Mfr. Part No. C11F4TM080B
Each
£555.76
  • RS Stock No. 266-1370
  • Mfr. Part No. 412299
Each
£144.56
  • RS Stock No. 231-9355
  • Mfr. Part No. 1SDA104723R1 xFP XT5 400A3p
Each
£74.48
  • RS Stock No. 254-637
  • Mfr. Part No. 236685 PXL-C10-DC
Each
£60.97
  • RS Stock No. 229-388
  • Mfr. Part No. 116895 NZM2-XHB-DA
Each
£297.62
  • RS Stock No. 203-2168
  • Mfr. Part No. 3NA7820
Each (In a Pack of 3)
£4.82
Better World
  • RS Stock No. 236-6786
  • Mfr. Part No. 1SDA068514R1 XT4H 160 Ekip LS/I 160A FF
Each
£774.10
  • RS Stock No. 277-0874
  • Mfr. Part No. 3WA9111-0BB21
1 Set
£507.97
  • RS Stock No. 202-7059
  • Mfr. Part No. 5SJ4104-7HG40
Each
£41.56
  • RS Stock No. 237-5088
  • Mfr. Part No. 2CSR253101R1404
Each
£294.48
  • RS Stock No. 256-467
  • Mfr. Part No. 3VA5560-6GC42-0AA0
Each
£2,538.34
  • RS Stock No. 286-4977
  • Mfr. Part No. 1SLM006501A2212
Each
£34.42
  • RS Stock No. 182-1815
  • Mfr. Part No. 170M3808D
Each
£46.77
Better World
  • RS Stock No. 211-2369
  • Mfr. Part No. M9F22232
Each
£79.84
Better World
  • RS Stock No. 200-6175
  • Mfr. Part No. A9P34606
Each
£110.83
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