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

165 of 999+
Better World
  • RS Stock No. 772-1372
  • Mfr. Part No. 5SY4310-7
Each
£80.14
  • RS Stock No. 849-5645
  • Mfr. Part No. GMC-6-3-R
Each
£3.03
Better World
  • RS Stock No. 209-7455
  • Mfr. Part No. 5SL4304-7
Each
£86.88
  • RS Stock No. 219-6248
  • Mfr. Part No. 0154003.DRT
Each (In a Pack of 10)
£3.829
  • RS Stock No. 174-0730
  • Mfr. Part No. 01550900M
Each (In a Pack of 5)
£2.312
  • RS Stock No. 488-6353
  • Mfr. Part No. 2CDS251001R0984 - S201C0.5
Each
£17.26
  • RS Stock No. 405-9270
  • Mfr. Part No. 8340-F410-P1M1-A3H0-40A
Each
£60.10
Better World
  • RS Stock No. 790-9210
  • Mfr. Part No. A9D31825
Each
£148.47
  • RS Stock No. 610-9872
Each (In a Pack of 10)
£0.409
  • RS Stock No. 247-2931
  • Mfr. Part No. W212585
1 Box of 10
£32.83
  • RS Stock No. 229-183
  • Mfr. Part No. C10M6 CYLINDRICAL FUSE 10 x 38 6A AM 500V AC
1 Pack of 10
£8.72
  • RS Stock No. 245-141
  • Mfr. Part No. A9D06832
Each
£166.42
  • RS Stock No. 783-3251
  • Mfr. Part No. 70-007-33/5A
1 Pack of 10
£5.22
  • RS Stock No. 339-814
  • Mfr. Part No. SEA9BN12P
Each
£321.63
  • RS Stock No. 228-820
  • Mfr. Part No. STD20
1 Pack of 20
£134.11
  • RS Stock No. 218-8704
  • Mfr. Part No. 1492-SPM1B070-N
Each
£30.30
  • RS Stock No. 563-368
Each (In a Pack of 10)
£0.253
Better World
  • RS Stock No. 196-3626
  • Mfr. Part No. 5SY6203-7
Each
£44.78
  • RS Stock No. 277-3908
Each (In a Bag of 1000)
£1.723
  • RS Stock No. 101-736
Each
£91.96
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