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

45793 Products showing for Fuses & Circuit Breakers

2284 / 999+
ABB Emax2 Electronic Circuit Breaker 630A 1SDA07, 4 channels
  • RS Stock No. 259-4496
  • Mfr. Part No. 1SDA072708R1
Each
MYR49,360.33
ABB Emax2 Electronic Circuit Breaker 2kA Ekip Dip LSI, 3 channels
  • RS Stock No. 259-4265
  • Mfr. Part No. 1SDA072393R1
Each
MYR51,388.21
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 2.5 kA, Fixed Mount
  • RS Stock No. 270-4753
  • Mfr. Part No. 3VA2163-7JQ36-0AA0
Each
MYR9,604.66
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4570
  • Mfr. Part No. 3VA2125-7JQ36-0AA0
Each
MYR9,604.66
Better World
ABB Emax2 Electronic Circuit Breaker 1kA Ekip Touch LSI, 3 channels
  • RS Stock No. 259-3070
  • Mfr. Part No. 1SDA070925R1
Each
MYR29,179.09
Siemens SENTRON Wire Connector for use with 3VA2 100/160/250
  • RS Stock No. 210-9360
  • Mfr. Part No. 3VA9263-0QB00
Each
MYR281.49
Better World
Siemens, SENTRON MCCB 4P 63A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-3856
  • Mfr. Part No. 3VA2063-6KQ46-0AA0
Each
MYR12,647.08
ABB Emax2 Electronic Circuit Breaker 2kA 1SDA07, 4 channels
  • RS Stock No. 259-3681
  • Mfr. Part No. 1SDA071655R1
Each
MYR48,972.05
Better World
ABB Emax2 Electronic Circuit Breaker 4kA Ekip G Touch LSIG, 3 channels
  • RS Stock No. 259-3299
  • Mfr. Part No. 1SDA071207R1
Each
MYR124,707.13
Schneider Electric ComPacT New Generation Trip Unit for use with ComPacT NSX 100 Circuit Breakers
  • RS Stock No. 260-9379
  • Mfr. Part No. C104MG016
Each
MYR1,224.92
ABB Emax2 Electronic Circuit Breaker 4kA Ekip Dip LI, 4 channels
  • RS Stock No. 259-3806
  • Mfr. Part No. 1SDA071821R1
Each
MYR113,184.28
Eaton PC Board Non Resettable Fuse, Radial 6.3A, 125V ac
  • RS Stock No. 169-9545
  • Mfr. Part No. SS-5F-6-3A-BK
Each (In a Bag of 200)
MYR4.968
ABB SMISSLINE TP MCB, 4P, 25A Curve D, 400V AC
  • RS Stock No. 246-2673
  • Mfr. Part No. 2CCS573103R8251
Each
MYR1,088.71
ABB Emax2 Electronic Circuit Breaker 2kA Ekip Hi-Touch LSI, 4 channels
  • RS Stock No. 259-3702
  • Mfr. Part No. 1SDA071678R1
Each
MYR74,526.92
Better World
Siemens SENTRON 5SL6 MCB, 1+N, 63A Curve C, 230V AC, 72V DC
  • RS Stock No. 213-1057
  • Mfr. Part No. 5SL6563-7
Each
MYR577.72
Siemens, SENTRON MCCB 4P 1kA, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 270-4775
  • Mfr. Part No. 3VA2510-5HM42-0AA0
Each
MYR39,514.89
Eaton 25A Stud Mount 6.3 x 32mm Fuse Block, 250V ac
  • RS Stock No. 233-0594
  • Mfr. Part No. BK2-S-4201-1-R
1 Box of 2000
MYR10,355.00
Better World
ABB Emax2 Electronic Circuit Breaker 1.25kA Ekip Hi-Touch LSI, 3 channels
  • RS Stock No. 259-3011
  • Mfr. Part No. 1SDA070849R1
Each
MYR49,934.22
Bourns Non Resettable Fuse 2.5A, 125V ac
  • RS Stock No. 191-4196
  • Mfr. Part No. SF-2410HI250T-2
Each (On a Reel of 1000)
MYR3.257
Mersen 63A Slow-Blow Ceramic Cartridge Fuse, 22.2 x 58mm
  • RS Stock No. 247-2697
  • Mfr. Part No. B217696
1 Box of 10
MYR681.85
1
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