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.

50958 Products showing for Fuses & Circuit Breakers

733 of 999+
  • RS Stock No. 241-4430
  • Mfr. Part No. 5SM2622-6
Each
£89.11
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  • Mfr. Part No. A9P32332
Each
£162.53
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  • Mfr. Part No. 170M5808D
Each (In a Box of 3)
£246.97
  • RS Stock No. 261-702
  • Mfr. Part No. BH-3145
Each
£415.82
  • RS Stock No. 205-174
  • Mfr. Part No. BDF36030
Each
£590.43
Better World
  • RS Stock No. 236-6693
  • Mfr. Part No. 1SDA068323R1 XT4S 160 TMA 160A 3P+N FF
Each
£815.31
Better World
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  • Mfr. Part No. 3VA2340-6HM42-0AA0
Each
£1,828.50
  • RS Stock No. 783-3270
  • Mfr. Part No. 70-007-65/0.25A
Each (In a Pack of 10)
£0.56
  • RS Stock No. 209-6427
  • Mfr. Part No. V1036973 / BMD42V2
Each (In a Pack of 10)
£5.059
  • RS Stock No. 377-0213
  • Mfr. Part No. T214676
Each (In a Pack of 5)
£0.298
  • RS Stock No. 210-6950
  • Mfr. Part No. 3NC1425-5
Each (In a Pack of 10)
£32.199
Better World
  • RS Stock No. 236-7567
  • Mfr. Part No. 1SDA067923R1 XT2L 160 Ekip I 160A FF
Each
£667.91
  • RS Stock No. 851-1693
  • Mfr. Part No. FNQ-R-1/2
Each
£51.52
  • RS Stock No. 229-124
  • Mfr. Part No. FNQ-2-1/2
1 Pack of 10
£391.40
Better World
  • RS Stock No. 175-1424
  • Mfr. Part No. GV4L02N
Each
£473.10
  • RS Stock No. 738-2854
  • Mfr. Part No. 015406.3DR
Each (In a Pack of 10)
£2.218
  • RS Stock No. 229-272
  • Mfr. Part No. C14G16
1 Pack of 10
£13.72
  • RS Stock No. 120-948
  • Mfr. Part No. 168219 FRBDM-C16/2/01-G/A
Each
£151.34
  • RS Stock No. 259-051
  • Mfr. Part No. 271121 NZMN4-AE1000-NA
Each
£5,545.07
  • RS Stock No. 259-336
  • Mfr. Part No. 269301 NZMN3-AE600-NA
Each
£2,796.77
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