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

146 of 999+
Better World
  • RS Stock No. 535-4239
  • Mfr. Part No. 2CDS273001R0024 S203M-C2
Each
£89.58
  • RS Stock No. 221-3692
1 Bag of 5
£18.79
  • RS Stock No. 703-8226
  • Mfr. Part No. PV-5A10F
Each
£9.70
  • RS Stock No. 144-4951
  • Mfr. Part No. MJT720
Each
£25.45
  • RS Stock No. 284-5136
  • Mfr. Part No. 0034.6017
Each (In a Pack of 10)
£0.335
Better World
  • RS Stock No. 209-7455
  • Mfr. Part No. 5SL4304-7
Each
£86.88
  • RS Stock No. 922-8692
  • Mfr. Part No. 236022 PKNM-6/1N/C/003-A-MW
Each
£111.48
  • RS Stock No. 210-4729
  • Mfr. Part No. EUBLMC16B30A
Each
£57.18
  • RS Stock No. 752-7754
  • Mfr. Part No. 0 343 85
Each (In a Pack of 20)
£4.724
  • RS Stock No. 692-4987
  • Mfr. Part No. SF-0603F315-2
Each (In a Pack of 10)
£0.35
  • RS Stock No. 622-1118
  • Mfr. Part No. 5SE2340
Each (In a Pack of 10)
£2.404
  • RS Stock No. 610-9951
Each (In a Pack of 10)
£0.409
  • RS Stock No. 181-8544
  • Mfr. Part No. 100NHG00B-690
1 Box of 3
£14.83
  • RS Stock No. 396-376
  • Mfr. Part No. 3NE8020-1
Each (In a Pack of 3)
£59.157
Better World
  • RS Stock No. 746-7964
  • Mfr. Part No. 2CDS251001R0577 S201-K50
Each
£29.78
  • RS Stock No. 203-077
  • Mfr. Part No. 2CDS243701R0104
Each
£46.95
  • RS Stock No. 213-1028
  • Mfr. Part No. 5SJ4110-7HG42
Each
£49.44
Better World
  • RS Stock No. 776-3168
  • Mfr. Part No. A9N61504
Each
£51.49
  • RS Stock No. 288-4124
  • Mfr. Part No. 3120-N55F-P7T1-SGRD-16A
Each
£26.05
Better World
  • RS Stock No. 203-2200
  • Mfr. Part No. 5SY5203-7
Each
£108.63
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