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

682 of 999+
  • RS Stock No. 787-4233P
  • Mfr. Part No. 01550320ZXU
Each (Supplied in a Bag)
£3.08
Better World
  • RS Stock No. 219-9104
  • Mfr. Part No. LV429373
Each
£305.61
  • RS Stock No. 260-7506
  • Mfr. Part No. C10W45E040
Each
£2,790.57
  • RS Stock No. 255-2189
  • Mfr. Part No. 037434
Each (In a Pack of 10)
£65.657
  • RS Stock No. 299-918
  • Mfr. Part No. 3NW7334
Each
£30.25
  • RS Stock No. 262-761
  • Mfr. Part No. 4NHG000B-400
1 Pack of 3
£10.48
  • RS Stock No. 231-026
  • Mfr. Part No. 114735 XLSPP163
Each
£40.05
  • RS Stock No. 119-471
  • Mfr. Part No. C10S2TM063
Each
£396.00
  • RS Stock No. 252-5343
  • Mfr. Part No. 67220100
Each (In a Pack of 3)
£26.12
  • RS Stock No. 228-923
  • Mfr. Part No. C22M12
1 Pack of 10
£29.43
Better World
  • RS Stock No. 874-4278
  • Mfr. Part No. 3VA1196-3ED36-0AA0
Each
£183.00
  • RS Stock No. 122-357
  • Mfr. Part No. LV510487P
Each
£149.37
  • RS Stock No. 246-845
  • Mfr. Part No. 191581 NZMN3-MX350-AVE
Each
£2,315.48
  • RS Stock No. 229-457
  • Mfr. Part No. 109678 NZMC3-S400
Each
£1,564.63
  • RS Stock No. 253-264
  • Mfr. Part No. 211828 AZ-3-D100
Each
£462.58
  • RS Stock No. 246-905
  • Mfr. Part No. 192330 NZMN3-PMX450-SVE
Each
£2,820.58
Better World
  • RS Stock No. 124-3175
  • Mfr. Part No. 5SY4301-8
Each
£94.35
  • RS Stock No. 232-0338
  • Mfr. Part No. 2CSB803001R1630 DDA803 AC-63/0.03
Each
£414.13
  • RS Stock No. 229-550
  • Mfr. Part No. 113569 NZMH3-S500-AVE
Each
£2,926.87
Better World
  • RS Stock No. 219-9108
  • Mfr. Part No. M9F21204
Each
£87.84
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