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.

50958 Products showing for Fuses & Circuit Breakers

726 of 999+
  • RS Stock No. 237-5109
  • Mfr. Part No. 2CSR254101R1065
Each
£189.16
  • RS Stock No. 157-832
  • Mfr. Part No. 3VA9908-0BB16
Each
£77.75
  • RS Stock No. 629-203
  • Mfr. Part No. 8GK4003-6KK11
Each
£146.73
  • RS Stock No. 174-0364
  • Mfr. Part No. 0603L020YR
1 Reel of 4000
£3,057.91
  • RS Stock No. 261-462
  • Mfr. Part No. FNQ-R-1/2
1 Pack of 10
£413.27
  • RS Stock No. 186-3477
  • Mfr. Part No. 2CSS245202R0064
Each
£17.98
  • RS Stock No. 119-273
  • Mfr. Part No. KSA250DLE401
Each
£707.30
  • RS Stock No. 126-016
  • Mfr. Part No. 176089 SPPVT2-10-2+PE-AX
Each
£312.93
  • RS Stock No. 728-8636
  • Mfr. Part No. 106-P10-000040-1A
Each
£14.70
  • RS Stock No. 218-8841
  • Mfr. Part No. 1492-SPM3C010-N
Each
£88.09
  • RS Stock No. 848-4267
  • Mfr. Part No. KTK-R-20
Each
£30.81
  • RS Stock No. 825-5725
  • Mfr. Part No. P1MB2PC16
Each
£44.14
  • RS Stock No. 256-050
  • Mfr. Part No. 265739 NZMN2-S125
Each
£713.44
  • RS Stock No. 157-802
  • Mfr. Part No. 3VA9444-0KD00
Each
£1,363.88
  • RS Stock No. 218-8891
  • Mfr. Part No. 1492-SPM3D320-N
Each
£100.88
  • RS Stock No. 577-239
  • Mfr. Part No. 3-133-747
Each
£4.96
  • RS Stock No. 851-1390
  • Mfr. Part No. MDQ-7
Each (In a Pack of 5)
£5.106
Better World
  • RS Stock No. 260-421
  • Mfr. Part No. 3VA6325-7HL41-0AA0
Each
£2,167.06
  • RS Stock No. 131-798
  • Mfr. Part No. 2921284
Each
£208.26
Better World
  • RS Stock No. 270-4121
  • Mfr. Part No. 3VA2116-8HL42-0AA0
Each
£1,116.60
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