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.

51028 Products showing for Fuses & Circuit Breakers

593 of 999+
  • RS Stock No. 229-215
  • Mfr. Part No. FNQ-25
1 Pack of 10
£372.45
  • RS Stock No. 140-905
  • Mfr. Part No. 2CCS862001R1105
Each
£169.79
  • RS Stock No. 123-206
  • Mfr. Part No. 170263 FBHMV-80/2/1-A
Each
£228.29
  • RS Stock No. 230-424
  • Mfr. Part No. 119865 NZM2-4-XKP
Each
£22.62
  • RS Stock No. 782-8066
  • Mfr. Part No. W51-A152A1-20
Each
£5.06
  • RS Stock No. 864-4318
  • Mfr. Part No. 242202 PLSM-C10-MW
Each
£21.02
  • RS Stock No. 226-2789
  • Mfr. Part No. 3NJ6920-3DB00
Each
£46.35
  • RS Stock No. 182-1621
  • Mfr. Part No. 170M1559D
Each
£56.16
  • RS Stock No. 191-4162
  • Mfr. Part No. SF-2410FP0062T-2
Each (On a Reel of 1000)
£2.546
  • RS Stock No. 262-016
  • Mfr. Part No. EBF00330V0
Each
£91.84
  • RS Stock No. 252-825
  • Mfr. Part No. 215645 EVG-3PHAS/9MODUL
Each
£7.43
  • RS Stock No. 174-0837
  • Mfr. Part No. RF1182-000
Each (In a Pack of 20)
£0.191
Better World
  • RS Stock No. 225-5997
  • Mfr. Part No. 2CDS251001R0981 S201 D 0.5A - 10 KA
Each
£17.94
  • RS Stock No. 432-856
  • Mfr. Part No. C080N32EFM
Each
£3,156.70
  • RS Stock No. 251-2063
  • Mfr. Part No. KN10N
Each
£10.97
  • RS Stock No. 874-4446
  • Mfr. Part No. 3VA9388-0LB10
Each
£39.65
  • RS Stock No. 286-4973
  • Mfr. Part No. 1SLM004100A1900
Each
£11.36
Better World
  • RS Stock No. 209-5187
  • Mfr. Part No. 3VA2216-5MN32-0AA0
Each
£682.68
Better World
  • RS Stock No. 268-425
  • Mfr. Part No. 3VA6140-5KL31-2AA0
Each
£1,306.80
Better World
  • RS Stock No. 209-6549
  • Mfr. Part No. 5SL4620-8
Each
£131.51
Results per page