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.

50973 Products showing for Fuses & Circuit Breakers

2542 of 999+
Better World
  • RS Stock No. 216-5939
  • Mfr. Part No. 5SY7416-7
Each
£155.77
  • RS Stock No. 226-0828
  • Mfr. Part No. 5ST3712-3HG
Each
£110.64
  • RS Stock No. 279-4290
  • Mfr. Part No. 790-191
Each
£4.76
Better World
  • RS Stock No. 271-9812
  • Mfr. Part No. 3VA1120-3ED46-0AA0
Each
£229.99
  • RS Stock No. 120-295
  • Mfr. Part No. 167120 FRCMM-40/2/003-G/A-NA
Each
£164.16
  • RS Stock No. 178-1038
  • Mfr. Part No. S1045297 / BTCP42V50/10
Each (In a Pack of 10)
£17.596
  • RS Stock No. 147-820
  • Mfr. Part No. 3VA5225-5EC31-0AA0
Each
£848.63
  • RS Stock No. 200-678
  • Mfr. Part No. 2CDS273347R0187
Each
£341.27
  • RS Stock No. 124-779
  • Mfr. Part No. 178808 KLV-24HWP-F
Each
£135.95
Better World
  • RS Stock No. 270-4587
  • Mfr. Part No. 3VA2125-7MQ32-0AA0
Each
£947.07
  • RS Stock No. 223-2824
  • Mfr. Part No. 60530004
Each (In a Pack of 10)
£4.265
  • RS Stock No. 223-2816
  • Mfr. Part No. 60330100
Each (In a Pack of 10)
£3.348
  • RS Stock No. 221-5600
  • Mfr. Part No. 3-128-213
1 Box of 50
£444.82
  • RS Stock No. 201-6556
  • Mfr. Part No. 2906744
Each
£138.80
Better World
  • RS Stock No. 210-9363
  • Mfr. Part No. 3VA9264-0JB12
Each
£29.39
  • RS Stock No. 135-488
  • Mfr. Part No. 0914646
1 Pack of 6
£543.66
  • RS Stock No. 825-5790
  • Mfr. Part No. P1MB3PB06
Each
£75.20
  • RS Stock No. 275-0451
  • Mfr. Part No. R11-2-15.0A-B06CV-V
1 Box of 10
£138.57
  • RS Stock No. 260-7733
  • Mfr. Part No. C16B3
Each
£376.20
  • RS Stock No. 259-824
  • Mfr. Part No. 284645 NZM3-XBR
Each
£35.29