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.

50893 Products showing for Fuses & Circuit Breakers

2529 of 999+
  • RS Stock No. 241-224
  • Mfr. Part No. 102290 FAZ-C16/3-RT
Each
£181.97
  • RS Stock No. 263-060
  • Mfr. Part No. 302493 KLV-SF5L-4PR
Each
£121.60
  • RS Stock No. 209-5270
  • Mfr. Part No. 5TE4812
Each
£77.88
  • RS Stock No. 181-8450
  • Mfr. Part No. SMD25
1 Box of 20
£105.85
  • RS Stock No. 272-2298
  • Mfr. Part No. 225524 CI-K4-PKZ4-G
Each
£59.80
Better World
  • RS Stock No. 157-258
  • Mfr. Part No. 3VA2125-5HM36-0AA0
Each
£652.81
  • RS Stock No. 132-862
  • Mfr. Part No. 183707 IZMX40B3-V25F-1
Each
£13,000.28
  • RS Stock No. 169-9520
  • Mfr. Part No. SR-5F-8A-BK
Each (In a Bag of 200)
£0.804
  • RS Stock No. 229-1419
  • Mfr. Part No. 0456040.DRSDE
Each (In a Pack of 2)
£3.985
Better World
  • RS Stock No. 282-6540
  • Mfr. Part No. PV-500A-3L-U-15
Each
£410.67
  • RS Stock No. 129-556
  • Mfr. Part No. 2804416
Each
£554.91
  • RS Stock No. 254-4201
  • Mfr. Part No. PF-JT3-70
Each
£20.74
  • RS Stock No. 541-4404A
  • Mfr. Part No. 021701.6MXP
Each (In a Pack of 100)
£0.09
  • RS Stock No. 201-191
  • Mfr. Part No. 2CDS272347R0547
Each
£258.04
  • RS Stock No. 210-9445
  • Mfr. Part No. 8GB5013-5KM
Each
£23.34
Better World
  • RS Stock No. 259-9874
  • Mfr. Part No. 1SDA070706R1
Each
£3,797.64
  • RS Stock No. 255-2320
  • Mfr. Part No. 408126
Each
£195.36
  • RS Stock No. 259-3507
  • Mfr. Part No. 1SDA071473R1
Each
£5,994.04
  • RS Stock No. 233-0568
  • Mfr. Part No. BK14-HTC-613M
Each (In a Pack of 10)
£8.228
  • RS Stock No. 122-325
  • Mfr. Part No. LV563505P
Each
£576.74
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