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.

51057 Products showing for Fuses & Circuit Breakers

627 of 999+
  • RS Stock No. 182-1463
  • Mfr. Part No. SD12-PB
Each (In a Box of 5)
£7.084
  • RS Stock No. 269-8415
  • Mfr. Part No. 8US1261-6MT10
Each
£62.41
  • RS Stock No. 239-856
  • Mfr. Part No. 192278 NZMN3-4-PX400/VAR
Each
£2,869.90
  • RS Stock No. 299-956
  • Mfr. Part No. 5SJ4205-8HG42
Each
£120.11
  • RS Stock No. 738-3018
  • Mfr. Part No. 0473.500MRT1L
Each (In a Pack of 10)
£1.767
  • RS Stock No. 257-958
  • Mfr. Part No. 284471 NZM4-XKM2S-1250
Each
£119.05
Better World
  • RS Stock No. 271-9321
  • Mfr. Part No. 3VA1140-4ED22-0AA0
Each
£173.08
  • RS Stock No. 147-996
  • Mfr. Part No. 3VA5217-5ED31-0AA0
Each
£730.44
  • RS Stock No. 259-3768
  • Mfr. Part No. 1SDA071772R1
Each
£12,072.27
  • RS Stock No. 169-9504
  • Mfr. Part No. SR-5-500MA-BK
Each (In a Bag of 200)
£1.068
  • RS Stock No. 265-1243
  • Mfr. Part No. 2565110
Each (In a Pack of 5)
£6.036
  • RS Stock No. 136-0611
  • Mfr. Part No. T200807 / NH2GG50V400-1
Each
£28.27
  • RS Stock No. 259-897
  • Mfr. Part No. 3.6WFGHA100
1 Pack of 3
£1,181.71
Better World
  • RS Stock No. 270-3865
  • Mfr. Part No. 3VA2063-7HN32-0AA0
Each
£754.85
Better World
  • RS Stock No. 209-6035
  • Mfr. Part No. 5SY7113-7
Each
£22.02
  • RS Stock No. 204-276
  • Mfr. Part No. 2CDS383001R0468
Each
£125.53
  • RS Stock No. 225-6129
  • Mfr. Part No. 2CSF204101R2400 F204 A-40/0,1
Each
£152.75
  • RS Stock No. 203-697
  • Mfr. Part No. 2CDS242701R0104
Each
£28.79
Better World
  • RS Stock No. 243-6173
  • Mfr. Part No. 5SU1324-7FR10
Each
£312.04
  • RS Stock No. 769-3356
  • Mfr. Part No. SS-5-500MA-BK
Each (In a Pack of 5)
£0.662
Results per page