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.

51028 Products showing for Fuses & Circuit Breakers

587 of 999+
Better World
  • RS Stock No. 249-688
  • Mfr. Part No. 3VA6460-5KM41-0AA0
Each
£3,303.65
  • RS Stock No. 263-151
  • Mfr. Part No. CHM3DU
1 Pack of 4
£55.39
  • RS Stock No. 232-0236
  • Mfr. Part No. 1SDA067018R1 XT2N 160 TMA 100A FF
Each
£244.36
  • RS Stock No. 119-406
  • Mfr. Part No. C10M2TM040
Each
£296.81
  • RS Stock No. 121-162
  • Mfr. Part No. 167693 FRCMM-25/2/003-G/A-NA-110
Each
£142.67
  • RS Stock No. 207-2708
  • Mfr. Part No. 2905416
Each
£435.95
  • RS Stock No. 537-5545
  • Mfr. Part No. 259093 NZMN2-A200
Each
£723.87
  • RS Stock No. 265-659
  • Mfr. Part No. 3VW9011-0AE11
Each
£311.62
Better World
  • RS Stock No. 874-4203
  • Mfr. Part No. 3VA1116-3EE36-0AA0
Each
£340.75
  • RS Stock No. 177-8006
Each (In a Box of 500)
£0.287
  • RS Stock No. 230-867
  • Mfr. Part No. 113192 NZMB2-A125-SVE
Each
£749.15
  • RS Stock No. 125-6894
  • Mfr. Part No. 0251004.HAT1L
Each (In a Pack of 10)
£0.919
  • RS Stock No. 226-1027
  • Mfr. Part No. 157.5701.6351
Each
£7.33
  • RS Stock No. 188-4482
1 Box of 1000
£6,055.09
Better World
  • RS Stock No. 260-242
  • Mfr. Part No. 3VA6225-8KQ41-2AA0
Each
£3,068.73
  • RS Stock No. 303-284
  • Mfr. Part No. 787-3861/100-000
Each
£30.32
  • RS Stock No. 200-175
  • Mfr. Part No. 2CDS273001R0338
Each
£120.75
  • RS Stock No. 182-1527
  • Mfr. Part No. AD32
Each (In a Box of 20)
£13.296
  • RS Stock No. 230-4430
  • Mfr. Part No. 044092 CU20X5
Each (In a Pack of 10)
£64.761
Better World
  • RS Stock No. 124-3169
  • Mfr. Part No. 5SY4250-6
Each
£61.79
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