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.

50973 Products showing for Fuses & Circuit Breakers

652 of 999+
  • RS Stock No. 253-552
  • Mfr. Part No. 259651 NZM2/3-XUHIV20208-240AC
Each
£179.42
Better World
  • RS Stock No. 256-6810
  • Mfr. Part No. M9F52330
Each
£207.57
  • RS Stock No. 261-2834
  • Mfr. Part No. 140G-G2C4-D12
Each
£587.58
  • RS Stock No. 183-3651
  • Mfr. Part No. 2CSB204001R1250
Each
£146.27
  • RS Stock No. 177-8055
1 Bag of 1000
£146.62
  • RS Stock No. 260-9484
  • Mfr. Part No. C10L3
Each
£610.77
Better World
  • RS Stock No. 256-6753
  • Mfr. Part No. M9F21208
Each
£87.21
  • RS Stock No. 135-509
  • Mfr. Part No. 0914882
1 Pack of 3
£521.67
  • RS Stock No. 171-6777
  • Mfr. Part No. S505H-V-2-5-R
Each (In a Pack of 5)
£0.496
Better World
  • RS Stock No. 237-3263
  • Mfr. Part No. 2CDS253103R0131
Each
£174.70
  • RS Stock No. 254-652
  • Mfr. Part No. 240904 FAZT-D12/3
Each
£176.87
  • RS Stock No. 120-322
  • Mfr. Part No. 167103 FRCMM-63/4/003-A-NA
Each
£179.80
  • RS Stock No. 259-587
  • Mfr. Part No. 278660 FAZ-C1,5/1N
Each
£57.40
  • RS Stock No. 263-193
  • Mfr. Part No. 7.2WKMH7355
Each
£1,570.58
  • RS Stock No. 253-900
  • Mfr. Part No. 269169 NZMB2-AF200-NA
Each
£1,214.29
  • RS Stock No. 213-1068
  • Mfr. Part No. 5SP4392-7
Each
£341.48
  • RS Stock No. 243-063
  • Mfr. Part No. 192187 NZMN2-PX250-TZ-SVE
Each
£2,792.52
  • RS Stock No. 602-212
  • Mfr. Part No. ADX490C
Each
£559.38
  • RS Stock No. 262-550
  • Mfr. Part No. 63NHG01BI-400
1 Pack of 3
£21.86
Better World
  • RS Stock No. 211-2351
  • Mfr. Part No. M9F21425
Each
£190.26
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