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

77 of 999+
  • RS Stock No. 202-7116
  • Mfr. Part No. 5ST3805-1
Each
£19.97
  • RS Stock No. 851-1230
  • Mfr. Part No. FNQ-3
Each
£48.74
Better World
  • RS Stock No. 231-9977
  • Mfr. Part No. 2CSS275101R0104 SN201 M-C10 -
Each
£35.23
  • RS Stock No. 124-3031
  • Mfr. Part No. EMCH106 EMCH106
Each
£25.31
  • RS Stock No. 287-5799
  • Mfr. Part No. N218213
Each
£8.50
  • RS Stock No. 521-4636
  • Mfr. Part No. 5ST3750
Each
£1.91
  • RS Stock No. 867-4353
  • Mfr. Part No. 3101.0115
Each
£5.29
  • RS Stock No. 852-7395
  • Mfr. Part No. AGX-30
Each
£2.02
Better World
  • RS Stock No. 791-3209
  • Mfr. Part No. A9F53232
Each
£74.84
  • RS Stock No. 161-1831
  • Mfr. Part No. 9005805.100
Each
£4.71
  • RS Stock No. 283-7538
  • Mfr. Part No. JF 10-150 M6
Each
£4.58
  • RS Stock No. 911-3473
Each (In a Pack of 10)
£0.155
  • RS Stock No. 413-838
Each (In a Pack of 10)
£4.373
Better World
  • RS Stock No. 746-7586
  • Mfr. Part No. 2CDS253001R0065 S203-B6
Each
£63.53
  • RS Stock No. 911-3445
Each (In a Pack of 10)
£0.392
  • RS Stock No. 893-0609
  • Mfr. Part No. 696212001002
Each (In a Pack of 5)
£1.628
  • RS Stock No. 254-4104
  • Mfr. Part No. PF-ET1-25
Each
£17.95
  • RS Stock No. 207-329
  • Mfr. Part No. SE125A24
Each
£322.63
  • RS Stock No. 136-0541
  • Mfr. Part No. A1014576 / FR10GR69V10
Each (In a Box of 10)
£7.096
Better World
  • RS Stock No. 482-689
  • Mfr. Part No. DF222
Each
£48.60
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