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

2253 / 999+
In Stock
Wickmann Fuse Block
  • RS Stock No. 174-0274
  • Mfr. Part No. 0PTF0078P
1 Box of 2000
MYR1,860.17
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 250A, Fixed Mount
  • RS Stock No. 260-8054
  • Mfr. Part No. C25W42D250
Each
MYR19,191.10
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 100A, Fixed Mount
  • RS Stock No. 260-7918
  • Mfr. Part No. C25H42D100
Each
MYR11,270.12
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 6.3kA 1SDA07, 4 channels
  • RS Stock No. 259-3899
  • Mfr. Part No. 1SDA071928R1
Each
MYR272,459.83
Temporarily out of stock
Better World
Siemens SENTRON 5SL4 MCB, 1+N, 63A Curve B, 230V AC, 72V DC
  • RS Stock No. 210-3385
  • Mfr. Part No. 5SL4563-6
Each
MYR470.62
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-4036
  • Mfr. Part No. 3VA2110-8JQ32-0AA0
Each
MYR10,023.18
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 4kA 1SDA07, 3 channels
  • RS Stock No. 259-4369
  • Mfr. Part No. 1SDA072548R1
Each
MYR123,220.29
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 4kA 1SDA07, 4 channels
  • RS Stock No. 259-3824
  • Mfr. Part No. 1SDA071839R1
Each
MYR157,324.19
In Stock
Bourns 50A Tag Fuse, 66mm, 170V dc, 24.1mm
  • RS Stock No. 254-4231
  • Mfr. Part No. PF-NT5-50
Each
MYR132.57
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 63A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3872
  • Mfr. Part No. 3VA2063-7JP42-0AA0
Each
MYR10,567.26
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3614
  • Mfr. Part No. 3VA2010-8JP46-0AA0
Each
MYR10,184.99
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 2kA Ekip Touch LI, 4 channels
  • RS Stock No. 259-4727
  • Mfr. Part No. 1SDA073004R1
Each
MYR51,202.48
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 2.5 kA, Fixed Mount
  • RS Stock No. 270-4748
  • Mfr. Part No. 3VA2163-7JP32-0AA0
Each
MYR7,593.25
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 150A, Fixed Mount
  • RS Stock No. 260-7959
  • Mfr. Part No. C25R32M150
Each
MYR13,186.07
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4665
  • Mfr. Part No. 3VA2140-7JQ36-0AA0
Each
MYR9,604.66
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 125A, Breaking Capacity 55 kA, DIN Rail Mount
  • RS Stock No. 271-9728
  • Mfr. Part No. 3VA1112-5FD42-0AA0
Each
MYR4,803.44
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 630A 1SDA07, 4 channels
  • RS Stock No. 259-4479
  • Mfr. Part No. 1SDA072687R1
Each
MYR37,402.96
Temporarily out of stock
Lovato MCB, 1P, 40A Curve C, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 188-1663
  • Mfr. Part No. P1MBUL1PC40
Each
MYR420.53
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3811
  • Mfr. Part No. 3VA2040-8JQ36-0AA0
Each
MYR10,118.09
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 2kA Ekip Touch LI, 3 channels
  • RS Stock No. 259-4309
  • Mfr. Part No. 1SDA072454R1
Each
MYR59,101.17
1
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