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. 517-6629
  • Mfr. Part No. RXEF040
Each (In a Pack of 10)
£0.39(exc. VAT)
  • RS Stock No. 849-5866
  • Mfr. Part No. ANL-40
Each (In a Pack of 5)
£64.532(exc. VAT)
  • RS Stock No. 181-8687
  • Mfr. Part No. BD40
Each
£12.04(exc. VAT)
  • RS Stock No. 261-723
  • Mfr. Part No. FNQ-R-3
1 Pack of 10
£408.89(exc. VAT)
  • RS Stock No. 849-5759
  • Mfr. Part No. MAX-40
Each
£5.64(exc. VAT)
Better World
  • RS Stock No. 220-1209
  • Mfr. Part No. A9C70342
Each
£507.76(exc. VAT)
Better World
  • RS Stock No. 271-9766
  • Mfr. Part No. 3VA1116-4ED12-0AA0
Each
£187.23(exc. VAT)
Better World
  • RS Stock No. 236-6733
  • Mfr. Part No. 1SDA068390R1 XT4L 250 TMA 200A 3P+N FF
Each
£672.31(exc. VAT)
  • RS Stock No. 250-4383
  • Mfr. Part No. 1SCA022661R8410
1 Box of 3
£20.67(exc. VAT)
  • RS Stock No. 611-0210
Each (In a Pack of 10)
£1.599(exc. VAT)
  • RS Stock No. 783-3380
  • Mfr. Part No. 70-059-60/8A
Each (In a Pack of 10)
£0.561(exc. VAT)
  • RS Stock No. 602-153
  • Mfr. Part No. NEN316
Each
£138.79(exc. VAT)
  • RS Stock No. 210-2132
  • Mfr. Part No. ESX10-TB-101-DC24V-2A-E
Each
£65.69(exc. VAT)
  • RS Stock No. 237-5958
  • Mfr. Part No. 1SDA054232R1 T4L250 FF TMA 200A
Each
£1,172.96(exc. VAT)
  • RS Stock No. 177-8100
Each (In a Pack of 20)
£0.462(exc. VAT)
Better World
  • RS Stock No. 211-0406
  • Mfr. Part No. KNA100AB4
Each
£211.95(exc. VAT)
Better World
  • RS Stock No. 237-3275
  • Mfr. Part No. 2CDS253103R0251
Each
£210.74(exc. VAT)
  • RS Stock No. 220-0607
  • Mfr. Part No. 1492-FB2M30-L
Each (In a Pack of 6)
£46.46(exc. VAT)
  • RS Stock No. 288-7116
  • Mfr. Part No. A9N18383
Each
£216.87(exc. VAT)
Better World
  • RS Stock No. 212-1608
  • Mfr. Part No. 2CDS251281R0134
Each
£40.88(exc. VAT)
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