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

2220 / 999+
Temporarily out of stock
Schneider Electric, ComPacT New Generation MCCB 4P 100A, Fixed Mount
  • RS Stock No. 260-7788
  • Mfr. Part No. C16H44V100
Each
MYR16,014.01
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1kA 1SDA07, 4 channels
  • RS Stock No. 259-4527
  • Mfr. Part No. 1SDA072765R1
Each
MYR23,436.60
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 630A 1SDA07, 3 channels
  • RS Stock No. 259-9894
  • Mfr. Part No. 1SDA070727R1
Each
MYR44,577.35
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 2.5kA 1SDA07, 4 channels
  • RS Stock No. 259-3725
  • Mfr. Part No. 1SDA071701R1
Each
MYR71,646.22
Temporarily out of stock
Lovato Add-on blocks Phase Barrier for use with GL Series Switch Disconnectors
  • RS Stock No. 248-5572
  • Mfr. Part No. GLX902
Each
MYR204.34
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 800A Ekip G Hi-Touch LSIG, 4 channels
  • RS Stock No. 259-3458
  • Mfr. Part No. 1SDA071400R1
Each
MYR58,830.50
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 1kA Ekip Dip LSI, 3 channels
  • RS Stock No. 259-3090
  • Mfr. Part No. 1SDA070943R1
Each
MYR37,170.59
Temporarily out of stock
Better World
Siemens SENTRON 3VA1 MCB, 3P, 4A
  • RS Stock No. 224-7781
  • Mfr. Part No. 3VA1104-5MG32-0AA0
Each
MYR1,492.39
In Stock
Bourns Thermal Fuse +77°C 60 A, 28V
  • RS Stock No. 258-6352
  • Mfr. Part No. AC77ABD
Each
MYR9.49
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-3960
  • Mfr. Part No. 3VA2110-6JP46-0AA0
Each
MYR9,016.25
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 630A 1SDA07, 4 channels
  • RS Stock No. 259-3398
  • Mfr. Part No. 1SDA071332R1
Each
MYR28,219.51
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.6kA Ekip G Touch LSIG, 4 channels
  • RS Stock No. 259-4598
  • Mfr. Part No. 1SDA072857R1
Each
MYR49,742.90
Temporarily out of stock
Siemens 900A size NH3 Square Body Flush End Contacts Fuse, aR, 1kV
  • RS Stock No. 210-6952
  • Mfr. Part No. 3NC3340-6U
Each (In a Pack of 3)
MYR1,457.883
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 211-3763
  • Mfr. Part No. 3VA2025-6HN36-0AA0
Each
MYR4,658.29
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 500A, Breaking Capacity 70 kA, Fixed Mount
  • RS Stock No. 270-3510
  • Mfr. Part No. 3VA1450-6EF42-0AA0
Each
MYR13,900.24
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 80A, Breaking Capacity 70 kA, Fixed Mount
  • RS Stock No. 210-1682
  • Mfr. Part No. 3VA1180-6EE46-0AA0
Each
MYR2,514.38
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 63A, Breaking Capacity 2.5 kA, Fixed Mount
  • RS Stock No. 270-4730
  • Mfr. Part No. 3VA2163-6KQ42-0AA0
Each
MYR10,832.27
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 1kA 1SDA07, 3 channels
  • RS Stock No. 259-9927
  • Mfr. Part No. 1SDA070788R1
Each
MYR40,750.98
In Stock
Bourns Surface Mount Fuse 750mA, 65V dc
  • RS Stock No. 245-9238
  • Mfr. Part No. SF-1206SA075M-2
Each (On a Tape of 10)
MYR4.90
Currently unavailable
Schurter PC Board Non Resettable Fuse, Axial 3A, 125V ac/dc
  • RS Stock No. 173-9678
  • Mfr. Part No. 7010.7110.13
Each (In a Bag of 100)
MYR4.777
1
2220
2329
Results per page

Related links