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.

51057 Products showing for Fuses & Circuit Breakers

577 of 999+
  • RS Stock No. 438-841
  • Mfr. Part No. M9L11120
Each
£593.13
  • RS Stock No. 787-4261P
  • Mfr. Part No. 2920L150DR
Each (Supplied on a Reel)
£0.54
  • RS Stock No. 228-878
  • Mfr. Part No. 32NNL
1 Pack of 10
£15.59
Better World
  • RS Stock No. 248-4076
  • Mfr. Part No. KSA250CM4AF
Each
£946.34
  • RS Stock No. 771-0502
  • Mfr. Part No. 3062772
Each
£9.64
  • RS Stock No. 277-6089
  • Mfr. Part No. 549220
Each (In a Pack of 4)
£41.543
  • RS Stock No. 328-437
  • Mfr. Part No. 5ST3701-2HG
Each
£39.31
  • RS Stock No. 226-0793
  • Mfr. Part No. 3950500000
Each (In a Pack of 10)
£1.155
Better World
  • RS Stock No. 248-3825
  • Mfr. Part No. LV848395
Each
£3,085.67
  • RS Stock No. 131-799
  • Mfr. Part No. 2921080
Each
£320.81
  • RS Stock No. 354-296
  • Mfr. Part No. KH063SD551
Each
£2,659.06
Better World
  • RS Stock No. 219-9241
  • Mfr. Part No. A9F92206
Each
£387.36
  • RS Stock No. 287-5339
  • Mfr. Part No. 8614780000
Each
£71.43
Better World
  • RS Stock No. 209-5082
  • Mfr. Part No. 3VA2010-5HL42-0AA0
Each
£501.39
  • RS Stock No. 246-848
  • Mfr. Part No. 191590 NZMN3-VX250-T-AVE
Each
£2,666.67
  • RS Stock No. 250-4473
  • Mfr. Part No. 1SCA022701R0610
1 Box of 3
£59.50
  • RS Stock No. 246-2401
  • Mfr. Part No. 2CCG001716R0001
Each
£232.47
  • RS Stock No. 448-3285
  • Mfr. Part No. C320047
Each
£31.83
Better World
  • RS Stock No. 191-6104
  • Mfr. Part No. A9P24602
Each
£118.03
  • RS Stock No. 201-6967
  • Mfr. Part No. 2CSR275080R1064 DS201 M C6 AC30
Each
£143.09
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