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

126 of 999+
  • RS Stock No. 125-772
  • Mfr. Part No. 174205 IKA-1/8-OT
Each
£36.94
  • RS Stock No. 242-1140
Each (In a Pack of 5)
£4.17
  • RS Stock No. 156-9005
  • Mfr. Part No. 100FEE
Each
£125.08
  • RS Stock No. 409-766
  • Mfr. Part No. 1410-L210-L2F1-S02-1A
Each
£9.16
  • RS Stock No. 458-794
  • Mfr. Part No. A9F93125
Each
£69.60
  • RS Stock No. 922-6942
  • Mfr. Part No. 132680 FAZ-B6/1-NA
Each
£35.18
  • RS Stock No. 377-2124
  • Mfr. Part No. 3821100041
Each (In a Pack of 10)
£1.16
  • RS Stock No. 289-8815
  • Mfr. Part No. 2231003
Each
£2.24
  • RS Stock No. 521-5061
  • Mfr. Part No. 5ST3748
Each
£1.20
Better World
  • RS Stock No. 746-7845
  • Mfr. Part No. 2CDS252001R0041 S202-D4
Each
£48.58
  • RS Stock No. 174-0629
  • Mfr. Part No. 0215015.MXP
Each (In a Pack of 20)
£0.209
Better World
  • RS Stock No. 323-9021
  • Mfr. Part No. GB2CD09
Each
£47.67
  • RS Stock No. 712-4780
  • Mfr. Part No. 0090.0025
Each
£15.77
  • RS Stock No. 377-0241
  • Mfr. Part No. W211090
Each (In a Pack of 5)
£1.228
  • RS Stock No. 703-8774
  • Mfr. Part No. 16NHG000B-690
Each
£6.33
  • RS Stock No. 207-336
  • Mfr. Part No. SE36B250
Each
£459.36
Better World
  • RS Stock No. 203-2341
  • Mfr. Part No. 5SY5210-7
Each
£95.76
  • RS Stock No. 189-5340
  • Mfr. Part No. A1062715 / CUS103
Each
£23.50
  • RS Stock No. 610-9721
Each (In a Pack of 10)
£0.34
  • RS Stock No. 922-8718
  • Mfr. Part No. 236072 PKNM-10/1N/B/003-A-MW
Each
£111.48
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