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
Fuses - PCB
Fuses - PCB

46209 Products showing for Fuses & Circuit Breakers

2239 / 999+
Temporarily out of stock
Better World
Siemens SENTRON 3VA1 MCB, 2P, 20A
  • RS Stock No. 224-7819
  • Mfr. Part No. 3VA1120-3ED26-0AA0
Each
MYR1,474.71
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 160A, Breaking Capacity 70 kA, DIN Rail Mount
  • RS Stock No. 271-9808
  • Mfr. Part No. 3VA1116-6GF46-0AA0
Each
MYR5,343.80
Temporarily out of stock
ABB 224A Tag Fuse, NH1, 500V
  • RS Stock No. 250-4429
  • Mfr. Part No. 1SCA022697R7650
1 Box of 3
MYR363.35
Temporarily out of stock
Better World
Siemens SENTRON 5SY7 MCB, 3+N, 2A Curve C, 400V AC, 72V DC, 5 kA Breaking Capacity
  • RS Stock No. 213-1096
  • Mfr. Part No. 5SY7602-7
Each
MYR1,131.65
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 6.3kA 1SDA07, 3 channels
  • RS Stock No. 259-4452
  • Mfr. Part No. 1SDA072652R1
Each
MYR283,517.96
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 4kA 1SDA07, 4 channels
  • RS Stock No. 259-3856
  • Mfr. Part No. 1SDA071868R1
Each
MYR161,677.14
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 2kA Ekip Hi-Touch LSI, 3 channels
  • RS Stock No. 259-4253
  • Mfr. Part No. 1SDA072378R1
Each
MYR57,428.54
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 800A Ekip Touch LI, 4 channels
  • RS Stock No. 259-3555
  • Mfr. Part No. 1SDA071534R1
Each
MYR38,099.86
In Stock
Eaton 8A Bolt Fixing Photovoltaic Fuse, 1000V dc, 49.7mm
  • RS Stock No. 703-8260
  • Mfr. Part No. PV-8A10-T
Each
MYR48.77
Temporarily out of stock
Schneider Electric ComPacT New Generation Trip Unit for use with ComPacT NSX630 Circuit Breakers
  • RS Stock No. 260-8184
  • Mfr. Part No. C6336M500
Each
MYR16,256.47
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 200 kA, Fixed Mount
  • RS Stock No. 270-3941
  • Mfr. Part No. 3VA2110-0MN36-0AA0
Each
MYR5,265.56
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.25kA Ekip G Hi-Touch LSIG, 4 channels
  • RS Stock No. 259-4581
  • Mfr. Part No. 1SDA072830R1
Each
MYR59,308.80
Temporarily out of stock
Better World
Siemens SENTRON 5SL4 MCB, 2P, 63A Curve D, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 209-6478
  • Mfr. Part No. 5SL4263-8
Each
MYR1,092.38
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1kA 1SDA07, 3 channels
  • RS Stock No. 259-4051
  • Mfr. Part No. 1SDA072134R1
Each
MYR15,975.22
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 800A Ekip G Touch LSIG, 3 channels
  • RS Stock No. 259-9919
  • Mfr. Part No. 1SDA070767R1
Each
MYR46,968.92
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 32A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 271-9897
  • Mfr. Part No. 3VA1132-5ED46-0AA0
Each
MYR2,679.43
Temporarily out of stock
Lovato MCB, 1P, 6A Curve C, 400V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 188-1634
  • Mfr. Part No. P1MBUH1PC06
Each
MYR284.46
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 40A, Breaking Capacity 55 kA, DIN Rail Mount
  • RS Stock No. 271-9332
  • Mfr. Part No. 3VA1140-5GD42-0AA0
Each
MYR2,438.74
Temporarily out of stock
Siemens SENTRON Busbar Protector for use with 3VA15/25 1000
  • RS Stock No. 210-9410
  • Mfr. Part No. 3VA9603-0QA00
Each
MYR579.88
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 2.5kA Ekip Touch LI, 4 channels
  • RS Stock No. 259-3759
  • Mfr. Part No. 1SDA071754R1
Each
MYR90,789.04
1
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