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.

50957 Products showing for Fuses & Circuit Breakers

105 of 999+
  • RS Stock No. 413-276
  • Mfr. Part No. NITD4
Each (In a Pack of 5)
£2.702
  • RS Stock No. 779-9968
  • Mfr. Part No. OFAF000H40 1SCA022627R1120
Each
£4.59
Better World
  • RS Stock No. 202-7169
  • Mfr. Part No. 5SV3312-6KL
Each
£71.27
  • RS Stock No. 396-168
  • Mfr. Part No. 5SB221
Each (In a Pack of 5)
£1.172
Better World
  • RS Stock No. 772-1408
  • Mfr. Part No. 5SY4504-7
Each
£61.79
  • RS Stock No. 849-6579
  • Mfr. Part No. EUC3P4C
Each
£22.40
  • RS Stock No. 247-2695
  • Mfr. Part No. B212061
1 Box of 10
£15.41
  • RS Stock No. 174-0776
  • Mfr. Part No. 0997002.WXN
Each (In a Pack of 10)
£0.666
  • RS Stock No. 336-7851
  • Mfr. Part No. 0031.8231
Each (In a Pack of 10)
£1.441
  • RS Stock No. 218-8803
  • Mfr. Part No. 1492-SPM2D050
Each
£44.82
  • RS Stock No. 136-0629
  • Mfr. Part No. HP10M10
Each
£7.85
Better World
  • RS Stock No. 850-8619
  • Mfr. Part No. EZ9F16132
Each
£4.03
Better World
  • RS Stock No. 214-2080
  • Mfr. Part No. M9F14206
Each
£82.63
  • RS Stock No. 124-5058
  • Mfr. Part No. A2-3AF
Each (In a Pack of 5)
£0.742
  • RS Stock No. 230-0862
  • Mfr. Part No. 177374 FAZ6-B1,5/1
Each
£19.76
  • RS Stock No. 265-0170
Each
£8.58
Better World
  • RS Stock No. 191-6078
  • Mfr. Part No. A9P12610
Each
£55.43
  • RS Stock No. 188-6710
  • Mfr. Part No. H084302
Each (In a Pack of 10)
£3.439
  • RS Stock No. 179-9660
  • Mfr. Part No. 64200000
Each
£8.52
  • RS Stock No. 537-5551
  • Mfr. Part No. 259094 NZMN2-A250
Each
£882.43
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