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

2233 / 999+
Schneider Electric, ComPacT MCCB 3P 500A, Fixed Mount
  • RS Stock No. 260-8231
  • Mfr. Part No. C63R31M500
Each
MYR21,830.33
ABB Emax2 Electronic Circuit Breaker 1.6kA 1SDA07, 4 channels
  • RS Stock No. 259-3644
  • Mfr. Part No. 1SDA071618R1
Each
MYR55,012.49
Schneider Electric, ComPacT MCCB 3P 100A, Fixed Mount
  • RS Stock No. 260-7564
  • Mfr. Part No. C11E3TM100B
Each
MYR2,116.45
Better World
Siemens SENTRON 3VA1 MCB, 3P, 63A
  • RS Stock No. 224-7880
  • Mfr. Part No. 3VA1163-5MH36-0AA0
Each
MYR2,112.68
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3716
  • Mfr. Part No. 3VA2025-8KP32-0AA0
Each
MYR9,604.66
ABB Emax2 Electronic Circuit Breaker 4kA 1SDA07, 3 channels
  • RS Stock No. 259-4371
  • Mfr. Part No. 1SDA072551R1
Each
MYR118,202.15
Better World
Siemens SENTRON 3VA1 MCB, 3P, 20A
  • RS Stock No. 224-7826
  • Mfr. Part No. 3VA1120-5MH36-0AA0
Each
MYR1,627.00
ABB Emax2 Electronic Circuit Breaker 2.5kA 1SDA07, 3 channels
  • RS Stock No. 259-4288
  • Mfr. Part No. 1SDA072420R1
Each
MYR76,013.76
Siemens SENTRON Wire Connector for use with 3VA1 400/630 and 3VA2 400/630
  • RS Stock No. 210-9407
  • Mfr. Part No. 3VA9484-0JC23
Each
MYR1,682.29
ABB Emax2 Electronic Circuit Breaker 4kA 1SDA07, 4 channels
  • RS Stock No. 259-3855
  • Mfr. Part No. 1SDA071867R1
Each
MYR135,021.81
Schneider Electric, ComPacT MCCB 4P 160A, Fixed Mount
  • RS Stock No. 260-7701
  • Mfr. Part No. C12H4TM160L
Each
MYR8,650.57
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 2.5 kA, Fixed Mount
  • RS Stock No. 270-4733
  • Mfr. Part No. 3VA2163-7HK36-0AA0
Each
MYR4,937.92
ABB Emax2 Electronic Circuit Breaker 1.6kA 1SDA07, 3 channels
  • RS Stock No. 259-4117
  • Mfr. Part No. 1SDA072225R1
Each
MYR22,862.64
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-3949
  • Mfr. Part No. 3VA2110-6HK36-0AA0
Each
MYR4,855.45
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 160A, Breaking Capacity 55 kA, DIN Rail Mount
  • RS Stock No. 271-9786
  • Mfr. Part No. 3VA1116-5FD46-0AA0
Each
MYR6,297.79
Legrand 80A M Ceramic Cartridge Fuse, 22.2 x 58mm
  • RS Stock No. 266-3163
  • Mfr. Part No. 0 151 80
1 Box of 10
MYR1,268.78
Better World
ABB Emax2 Electronic Circuit Breaker 2.5kA Ekip G Hi-Touch LSIG, 3 channels
  • RS Stock No. 259-3221
  • Mfr. Part No. 1SDA071090R1
Each
MYR86,979.03
Schneider Electric, ComPacT MCCB 4P 25A, Fixed Mount
  • RS Stock No. 260-7628
  • Mfr. Part No. C11H4TM025B
Each
MYR3,621.46
ABB Emax2 Electronic Circuit Breaker 800A 1SDA07, 4 channels
  • RS Stock No. 259-4627
  • Mfr. Part No. 1SDA072897R1
Each
MYR60,680.96
ABB Emax2 Electronic Circuit Breaker 800A 1SDA07, 4 channels
  • RS Stock No. 259-4518
  • Mfr. Part No. 1SDA072740R1
Each
MYR45,246.91
1
2233
2329
Results per page

Related links