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.

50914 Products showing for Fuses & Circuit Breakers

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  • RS Stock No. 136-0643
  • Mfr. Part No. F1018629 / FR22GR69V100T
Each
£27.85(exc. VAT)
  • RS Stock No. 830-4278
  • Mfr. Part No. 8020.5076.G
Each (In a Pack of 10)
£0.613(exc. VAT)
  • RS Stock No. 820-7161
  • Mfr. Part No. 0440007.WR
Each (In a Pack of 100)
£0.454(exc. VAT)
  • RS Stock No. 270-3003
  • Mfr. Part No. A228459
Each
£14.73(exc. VAT)
  • RS Stock No. 231-9309
  • Mfr. Part No. 1SDA073800R1
Each
£74.95(exc. VAT)
  • RS Stock No. 867-5343
  • Mfr. Part No. SMD150F/33-2
Each (In a Bag of 10)
£0.535(exc. VAT)
  • RS Stock No. 431-6725
  • Mfr. Part No. 153.5631.5701
Each (In a Pack of 5)
£3.32(exc. VAT)
  • RS Stock No. 849-6279
  • Mfr. Part No. ECWBB6
Each
£3.33(exc. VAT)
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  • Mfr. Part No. EUC1P40B
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£7.91(exc. VAT)
  • RS Stock No. 232-0083
  • Mfr. Part No. 1SDA054117R1 T4N320 FF PR221-LS 320A
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£1,078.13(exc. VAT)
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  • Mfr. Part No. 7010.3470
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£0.57(exc. VAT)
  • RS Stock No. 852-7055
  • Mfr. Part No. MDA-20-R
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£1.32(exc. VAT)
  • RS Stock No. 156-8670
  • Mfr. Part No. CEO100M200
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£41.83(exc. VAT)
  • RS Stock No. 201-6560
  • Mfr. Part No. 2909589
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£1,331.76(exc. VAT)
  • RS Stock No. 169-9496
  • Mfr. Part No. SR-5-250MA-BK
Each (In a Bag of 200)
£0.465(exc. VAT)
Better World
  • RS Stock No. 790-9207
  • Mfr. Part No. A9D31810
Each
£148.47(exc. VAT)
  • RS Stock No. 396-354
  • Mfr. Part No. 3NE8024-1
Each (In a Pack of 3)
£72.267(exc. VAT)
  • RS Stock No. 214-778
  • Mfr. Part No. EZ9E8MCU
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£90.71(exc. VAT)
  • RS Stock No. 182-1803
  • Mfr. Part No. 60LR85
Each
£9.93(exc. VAT)
  • RS Stock No. 495-0707
  • Mfr. Part No. LVR008NK
Each (In a Pack of 5)
£0.596(exc. VAT)
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