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. 736-0762
  • Mfr. Part No. 3403.0172.24
Each (In a Pack of 10)
£0.575(exc. VAT)
Better World
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  • Mfr. Part No. A9F92125
Each
£45.56(exc. VAT)
  • RS Stock No. 125-1428
  • Mfr. Part No. 1492-SPM2B010
Each
£42.64(exc. VAT)
  • RS Stock No. 203-3952
  • Mfr. Part No. 5SD420
Each (In a Pack of 5)
£7.848(exc. VAT)
  • RS Stock No. 260-8130
  • Mfr. Part No. C40N42D400
Each
£3,844.93(exc. VAT)
  • RS Stock No. 260-7920
  • Mfr. Part No. C25H42D250
Each
£2,316.33(exc. VAT)
  • RS Stock No. 225-6106
  • Mfr. Part No. 2CSF202101R2800 F202 A-80/0.1
Each
£224.48(exc. VAT)
  • RS Stock No. 608-685
  • Mfr. Part No. 3NB1126-0KK10
1 Pack of 3
£333.42(exc. VAT)
  • RS Stock No. 237-6259
  • Mfr. Part No. 1SDA067170R1 FC CuAl 1x185 XT2 8PCS
Each
£100.16(exc. VAT)
  • RS Stock No. 260-8092
  • Mfr. Part No. C40F34V400
Each
£5,035.56(exc. VAT)
Better World
  • RS Stock No. 214-2071
  • Mfr. Part No. M9F11316
Each
£111.09(exc. VAT)
  • RS Stock No. 263-095
  • Mfr. Part No. PXS24E02A002 PXS24E-e2/F
Each
£30.10(exc. VAT)
  • RS Stock No. 145-107
  • Mfr. Part No. SPD-10-320S
Each
£9.18(exc. VAT)
  • RS Stock No. 768-3762
  • Mfr. Part No. F331067
Each
£61.16(exc. VAT)
  • RS Stock No. 703-8210
  • Mfr. Part No. PV-2A10F
Each
£9.70(exc. VAT)
  • RS Stock No. 240-6389
  • Mfr. Part No. CCPBR0640AB
Each
£26.07(exc. VAT)
  • RS Stock No. 221-3650
1 Bag of 5
£52.73(exc. VAT)
  • RS Stock No. 333-221
  • Mfr. Part No. 201-0.5A
Each
£38.45(exc. VAT)
  • RS Stock No. 218-8885
  • Mfr. Part No. 1492-SPM3D150-N
Each
£85.51(exc. VAT)
  • RS Stock No. 181-8611
  • Mfr. Part No. 100MJ31-7
Each (In a Box of 10)
£51.043(exc. VAT)
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