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

46578 Products showing for Fuses & Circuit Breakers

2227 / 999+
ABB Emax2 Electronic Circuit Breaker 4kA 1SDA07, 4 channels
  • RS Stock No. 259-3812
  • Mfr. Part No. 1SDA071827R1
Each
MYR135,021.81
Siemens ALPHA Distribution Board
  • RS Stock No. 272-0308
  • Mfr. Part No. 8GK1062-5KK11
Each
MYR4,425.20
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3721
  • Mfr. Part No. 3VA2025-8KQ32-0AA0
Each
MYR12,877.34
Schneider Electric, ComPacT MCCB 4P 250A, Fixed Mount
  • RS Stock No. 260-8021
  • Mfr. Part No. C25V45E250
Each
MYR23,402.02
Better World
Eaton 250A Tag Fuse, 205 x 78 x 89mm, 1.5kV, 205mm
  • RS Stock No. 282-6229
  • Mfr. Part No. PV-200A-2XL-U-15
Each
MYR2,550.65
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3577
  • Mfr. Part No. 3VA2010-7HN36-0AA0
Each
MYR6,014.30
Schurter SMD Non Resettable Fuse 5A, 32V ac/dc
  • RS Stock No. 188-4475
  • Mfr. Part No. 3-103-130
Each (On a Reel of 750)
MYR17.177
Better World
Siemens SENTRON 3VA1 MCB, 4P, 25A
  • RS Stock No. 224-7833
  • Mfr. Part No. 3VA1125-4GF42-0AA0
Each
MYR2,303.22
Schneider Electric, ComPacT MCCB 3P 12.5A, Fixed Mount
  • RS Stock No. 260-7460
  • Mfr. Part No. C10V3MA013
Each
MYR5,556.16
Schneider Electric, ComPacT NSX Circuit breaker 1P 63A, Breaking Capacity 25 kA, Busbar System
  • RS Stock No. 654-210
  • Mfr. Part No. IL0631P253
Each
MYR939.89
Better World
Siemens, SENTRON MCCB 4P 25A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3676
  • Mfr. Part No. 3VA2025-7HN46-0AA0
Each
MYR7,475.86
Schneider Electric, ComPacT MCCB 4P 125A, Fixed Mount
  • RS Stock No. 260-7951
  • Mfr. Part No. C25N4TM125
Each
MYR9,534.05
Better World
Siemens SENTRON 3VA1 MCB, 3P, 80A
  • RS Stock No. 224-7891
  • Mfr. Part No. 3VA1180-5MH36-0AA0
Each
MYR2,308.80
Siemens, SENTRON MCCB 4P 63A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4825
  • Mfr. Part No. 3VA2563-7HM42-0AA0
Each
MYR27,092.75
Bourns 1.1A Resettable Fuse, 6V
  • RS Stock No. 647-8314P
  • Mfr. Part No. MF-NSMF110-2
Each (Supplied on a Reel)
MYR3.257
Bourns SMD Non Resettable Fuse 2.5A, 125V ac
  • RS Stock No. 191-4575
  • Mfr. Part No. SF-2410HI250T-2
Each (On a Tape of 10)
MYR5.534
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-4709
  • Mfr. Part No. 3VA2163-0MS36-0AA0
Each
MYR3,787.57
Better World
Siemens RCBO, 25A Current Rating, 2P Poles, 30mA Trip Sensitivity, Type B, Sentron Range
  • RS Stock No. 243-6149
  • Mfr. Part No. 5SU1324-6FR25
Each
MYR1,350.67
Schneider Electric, ComPacT MCCB 4P 80A, Fixed Mount
  • RS Stock No. 260-7666
  • Mfr. Part No. C11N4TM080B
Each
MYR4,078.50
Better World
Siemens, SENTRON MCCB 4P 25A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3703
  • Mfr. Part No. 3VA2025-8HM46-0AA0
Each
MYR7,981.15
1
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