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

93 of 999+
  • RS Stock No. 865-8004
  • Mfr. Part No. 0034.5048
Each (In a Pack of 10)
£0.891
Better World
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  • Mfr. Part No. 3VA2225-5HL32-0AA0
Each
£800.39
  • RS Stock No. 418-473
  • Mfr. Part No. CM63F
Each
£28.66
  • RS Stock No. 416-950
  • Mfr. Part No. 1110-F112-P1M1-1A
Each
£19.13
Better World
  • RS Stock No. 125-1382
  • Mfr. Part No. A9C70114
Each
£290.03
  • RS Stock No. 276-8941
  • Mfr. Part No. R9ERA263
Each
£74.07
  • RS Stock No. 182-1567
  • Mfr. Part No. 100FE
Each
£22.53
  • RS Stock No. 288-7099
  • Mfr. Part No. A9F94270
Each
£131.17
  • RS Stock No. 847-3493
  • Mfr. Part No. 278781 FAZ-D13/2
Each
£61.53
  • RS Stock No. 415-288
  • Mfr. Part No. TF160
Each
£94.05
  • RS Stock No. 232-0157
  • Mfr. Part No. 1SDA062866R1 T7S 1250A PR231-LS/I FF
Each
£3,592.59
  • RS Stock No. 231-9901
  • Mfr. Part No. 2CSF204101R1400 F204 A-40/0,03
Each
£170.99
  • RS Stock No. 125-1470
  • Mfr. Part No. 1492-SPM2C040
Each
£44.09
  • RS Stock No. 210-4734
  • Mfr. Part No. EUBLMC40B30A
Each
£57.18
  • RS Stock No. 825-5582
  • Mfr. Part No. P1MB1PC02
Each
£17.93
  • RS Stock No. 783-3292
  • Mfr. Part No. 70-007-65/1A
Each (In a Pack of 10)
£0.522
  • RS Stock No. 191-9448
  • Mfr. Part No. 2CDS252001R0021 S202-D2
Each
£48.58
Better World
  • RS Stock No. 776-2783
  • Mfr. Part No. A9XPH524
Each
£99.49
  • RS Stock No. 270-3042
  • Mfr. Part No. G095571
Each (In a Box of 10)
£0.723
Better World
  • RS Stock No. 219-9142
  • Mfr. Part No. M9F23102
Each
£34.06
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