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

2276 / 999+
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 800A Ekip Dip LI, 3 channels
  • RS Stock No. 259-4149
  • Mfr. Part No. 1SDA072261R1
Each
MYR32,059.59
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3705
  • Mfr. Part No. 3VA2025-8HN36-0AA0
Each
MYR5,426.75
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 630A 1SDA07, 3 channels
  • RS Stock No. 259-4006
  • Mfr. Part No. 1SDA072065R1
Each
MYR16,166.40
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-4623
  • Mfr. Part No. 3VA2140-6HK36-0AA0
Each
MYR4,174.67
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 100A, Fixed Mount
  • RS Stock No. 260-7859
  • Mfr. Part No. C25B34V100
Each
MYR14,085.99
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 2kA 1SDA07, 4 channels
  • RS Stock No. 259-3714
  • Mfr. Part No. 1SDA071688R1
Each
MYR78,522.67
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 630A Ekip G Hi-Touch LSIG, 4 channels
  • RS Stock No. 259-3416
  • Mfr. Part No. 1SDA071350R1
Each
MYR50,795.09
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 20A, Breaking Capacity 70 kA, Fixed Mount
  • RS Stock No. 271-9837
  • Mfr. Part No. 3VA1120-6GD46-0AA0
Each
MYR1,985.15
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 63A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 270-3833
  • Mfr. Part No. 3VA2063-5JQ42-0AA0
Each
MYR10,735.90
Temporarily out of stock
Schneider Electric, Compact MCCB 4P 1.6kA, Fixed Mount
  • RS Stock No. 247-1769
  • Mfr. Part No. 33264
Each
MYR28,573.96
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 400A, Fixed Mount
  • RS Stock No. 260-8170
  • Mfr. Part No. C40W36E400
Each
MYR31,198.87
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 160A, Fixed Mount
  • RS Stock No. 260-7897
  • Mfr. Part No. C25F4TM160
Each
MYR10,011.29
In Stock
Schurter SMD Non Resettable Fuse 500mA, 125V ac/dc
  • RS Stock No. 777-7514
  • Mfr. Part No. 7010.9790.63
Each
MYR5.61
Temporarily out of stock
Siemens SENTRON Wire Connector for use with 3VA1 400/630 and 3VA2 400/630
  • RS Stock No. 210-9381
  • Mfr. Part No. 3VA9384-0JF60
Each
MYR970.84
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 3.2kA Ekip Touch LSIG, 3 channels
  • RS Stock No. 259-3278
  • Mfr. Part No. 1SDA071176R1
Each
MYR97,665.49
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-4014
  • Mfr. Part No. 3VA2110-8HK32-0AA0
Each
MYR5,037.56
Temporarily out of stock
Eaton 16A Bolted Tag Fuse, F2, 550V ac
  • RS Stock No. 181-8763
  • Mfr. Part No. ESD16
Each
MYR29.81
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 1kA 1SDA07, 3 channels
  • RS Stock No. 259-3076
  • Mfr. Part No. 1SDA070930R1
Each
MYR52,968.14
Temporarily out of stock
Eaton xEffect MCB, 3+N, 1.5A Curve B
  • RS Stock No. 230-0866
  • Mfr. Part No. 177447 FAZ6-B1,5/3N
Each
MYR584.86
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 2.5 kA, Fixed Mount
  • RS Stock No. 270-4678
  • Mfr. Part No. 3VA2140-7MP32-0AA0
Each
MYR6,634.17
1
2276
2329
Results per page

Related links