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.

Circuit Breakers
Circuit Breakers
Earth & Lightning Protection
Earth & Lightning Protection
Fuse Holders & Accessories
Fuse Holders & Accessories
Fuses
Fuses

46319 Products showing for Fuses & Circuit Breakers

2269 / 999+
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-4039
  • Mfr. Part No. 3VA2110-8JQ46-0AA0
Each
MYR11,620.93
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-3968
  • Mfr. Part No. 3VA2110-6KQ46-0AA0
Each
MYR11,543.73
Better World
Siemens SENTRON Terminal for use with 3VA2 160
  • RS Stock No. 269-7114
  • Mfr. Part No. 3VA9164-0JA12
Each (In a Pack of 4)
MYR81.885
Siemens SENTRON 5SJ MCB, 1P, 3A
  • RS Stock No. 232-2219
  • Mfr. Part No. 5SJ4103-8HG41
Each
MYR314.86
ABB Emax2 Electronic Circuit Breaker 2kA 1SDA07, 4 channels
  • RS Stock No. 259-3703
  • Mfr. Part No. 1SDA071679R1
Each
MYR77,500.53
Legrand DX Range DX3 MCB, 3P, 10A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 731-9718
  • Mfr. Part No. 4 078 27
Each
MYR861.36
Bourns 160A Tag Fuse, 66mm, 800V ac/dc, 24.1mm
  • RS Stock No. 254-4114
  • Mfr. Part No. PF-FB1-160
Each
MYR474.05
Better World
ABB Emax2 Electronic Circuit Breaker 2kA Ekip Hi-Touch LSI, 3 channels
  • RS Stock No. 259-3167
  • Mfr. Part No. 1SDA071028R1
Each
MYR56,778.01
Better World
Siemens, SENTRON MCCB 4P 63A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 270-3825
  • Mfr. Part No. 3VA2063-5HM42-0AA0
Each
MYR5,222.34
Schneider Electric, ComPacT MCCB 4P 80A, Fixed Mount
  • RS Stock No. 260-7480
  • Mfr. Part No. C10V4TM080
Each
MYR8,068.18
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-4543
  • Mfr. Part No. 3VA2125-6KQ36-0AA0
Each
MYR10,053.93
Better World
Siemens SENTRON Terminal for use with 3VA5 250
  • RS Stock No. 269-7153
  • Mfr. Part No. 3VA9234-0JA12
Each (In a Pack of 4)
MYR62.858
Schneider Electric, ComPacT MCCB 4P 100A, Fixed Mount
  • RS Stock No. 260-7945
  • Mfr. Part No. C25N42D100
Each
MYR9,982.43
ABB Emax2 Electronic Circuit Breaker 1.6kA 1SDA07, 3 channels
  • RS Stock No. 259-4107
  • Mfr. Part No. 1SDA072214R1
Each
MYR20,184.18
Better World
ABB Emax2 Electronic Circuit Breaker 4kA Ekip Touch LSIG, 3 channels
  • RS Stock No. 259-3298
  • Mfr. Part No. 1SDA071206R1
Each
MYR109,374.20
Better World
Schneider Electric Shunt trip for use with Multi 9 C60 C60BP, Multi 9 C60 C60BPR, Multi 9 C60 C60SP, Multi 9 C60H-DC,
  • RS Stock No. 220-1342
  • Mfr. Part No. M9A26947
Each
MYR771.12
Better World
ABB Emax2 Electronic Circuit Breaker 3.2kA Ekip Dip LSI, 3 channels
  • RS Stock No. 259-3255
  • Mfr. Part No. 1SDA071153R1
Each
MYR76,757.09
Better World
Siemens, SENTRON MCCB 4P 50A, Breaking Capacity 70 kA, Fixed Mount
  • RS Stock No. 271-9372
  • Mfr. Part No. 3VA1150-6GE42-0AA0
Each
MYR2,873.27
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-3854
  • Mfr. Part No. 3VA2063-6KQ36-0AA0
Each
MYR10,848.41
Siemens 2A Centred Tag Fuse, NH000, 690V
  • RS Stock No. 210-6935
  • Mfr. Part No. 3NA7802-6
Each (In a Pack of 3)
MYR258.913
1
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