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

731 of 999+
  • RS Stock No. 122-408
  • Mfr. Part No. LV510665
Each
£217.15
  • RS Stock No. 244-282
  • Mfr. Part No. 125NHG01BI-400
1 Pack of 3
£22.59
  • RS Stock No. 187-8664
  • Mfr. Part No. SF-3812F1500T-2
Each (On a Reel of 2500)
£1.421
Better World
  • RS Stock No. 211-0482
  • Mfr. Part No. KSA630ED4306
Each
£1,945.77
Better World
  • RS Stock No. 248-4151
  • Mfr. Part No. LV833722
Each
£2,696.50
  • RS Stock No. 201-6974
  • Mfr. Part No. 2CSR275080R1324 DS201 M C32 AC30
Each
£143.09
  • RS Stock No. 328-357
  • Mfr. Part No. 5SL6616-6
Each
£105.59
  • RS Stock No. 627-136
  • Mfr. Part No. 3NC2263-0MK
1 Pack of 10
£121.27
  • RS Stock No. 266-3086
  • Mfr. Part No. 0 123 94
1 Box of 10
£53.98
  • RS Stock No. 230-423
  • Mfr. Part No. 119862 NZM1-XKP
Each
£15.22
Better World
  • RS Stock No. 269-863
  • Mfr. Part No. 3VA6115-7HN41-0AA0
Each
£1,326.01
Better World
  • RS Stock No. 219-9379
  • Mfr. Part No. LV431500
Each
£254.66
  • RS Stock No. 183-2862
  • Mfr. Part No. KV9448M
Each
£274.22
  • RS Stock No. 237-5985
  • Mfr. Part No. 1SDA054919R1 AUP-R T4-T5 400V AC/DC
Each
£22.13
  • RS Stock No. 131-421
  • Mfr. Part No. 2838791
Each
£2,615.72
  • RS Stock No. 287-6363
  • Mfr. Part No. 2CDS272061R0337
Each
£108.39
Better World
  • RS Stock No. 209-6635
  • Mfr. Part No. 5SL4406-7
Each
£132.54
  • RS Stock No. 610-453
  • Mfr. Part No. 5SY8108-8
Each
£47.50
  • RS Stock No. 202-7205
  • Mfr. Part No. 5SH5402
Each (In a Pack of 10)
£0.606
  • RS Stock No. 231-9738
  • Mfr. Part No. 2CDS272337R0064 SU202M-C6
1 Box of 1
£104.14
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