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. 922-8676
  • Mfr. Part No. 235441 PFIM-40/4/03-A-MW
Each
£158.20(exc. VAT)
Better World
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  • Mfr. Part No. M9F21232
Each
£82.51(exc. VAT)
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  • Mfr. Part No. R330019
Each
£43.35(exc. VAT)
  • RS Stock No. 231-344
  • Mfr. Part No. 113210 NZMB2-4-A160/100-SVE
Each
£1,159.86(exc. VAT)
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  • Mfr. Part No. 568678
Each
£9.33(exc. VAT)
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  • Mfr. Part No. A9D77420
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£608.36(exc. VAT)
  • RS Stock No. 203-775
  • Mfr. Part No. 2CDS383001R0578
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£188.34(exc. VAT)
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  • Mfr. Part No. 1SDA072024R1
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£48,302.83(exc. VAT)
  • RS Stock No. 254-477
  • Mfr. Part No. 260197 NZM2-XBR
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£23.81(exc. VAT)
  • RS Stock No. 243-067
  • Mfr. Part No. 192221 NZMH2-4-PX160/VAR
Each
£2,019.56(exc. VAT)
  • RS Stock No. 259-3357
  • Mfr. Part No. 1SDA071272R1
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£31,137.36(exc. VAT)
Better World
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£74.84(exc. VAT)
  • RS Stock No. 212-362
  • Mfr. Part No. DFCC3
1 Pack of 4
£235.37(exc. VAT)
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  • Mfr. Part No. 3-128-198
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£7.09(exc. VAT)
Better World
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  • Mfr. Part No. 5SY5402-7
Each
£211.19(exc. VAT)
  • RS Stock No. 251-2020
  • Mfr. Part No. ADC810F
Each
£214.63(exc. VAT)
  • RS Stock No. 611-0406
Each (In a Pack of 10)
£1.044(exc. VAT)
  • RS Stock No. 240-963
  • Mfr. Part No. 192030 NZMS2-AX100
Each
£715.14(exc. VAT)
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  • Mfr. Part No. 8020.5013
Each
£0.47(exc. VAT)
  • RS Stock No. 257-775
  • Mfr. Part No. 291487 EVG-16/3X1PHAS/6MODUL/HI
Each
£10.80(exc. VAT)
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