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

2248 / 999+
ABB Emax2 Electronic Circuit Breaker 4kA Ekip G Hi-Touch LSIG, 3 channels
  • RS Stock No. 259-4370
  • Mfr. Part No. 1SDA072550R1
Each
MYR128,795.76
ABB Emax2 Electronic Circuit Breaker 1.6kA 1SDA07, 4 channels
  • RS Stock No. 259-4582
  • Mfr. Part No. 1SDA072842R1
Each
MYR30,324.02
Better World
ABB Emax2 Electronic Circuit Breaker 1kA Ekip Touch LSIG, 3 channels
  • RS Stock No. 259-9942
  • Mfr. Part No. 1SDA070806R1
Each
MYR31,950.37
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3900
  • Mfr. Part No. 3VA2063-8JP32-0AA0
Each
MYR9,262.94
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4000
  • Mfr. Part No. 3VA2110-7KP46-0AA0
Each
MYR10,899.16
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 200 kA, Fixed Mount
  • RS Stock No. 270-3934
  • Mfr. Part No. 3VA2110-0KP42-0AA0
Each
MYR12,180.36
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-4622
  • Mfr. Part No. 3VA2140-6HK32-0AA0
Each
MYR3,994.61
Better World
Siemens SENTRON 5SL4 MCB, 1P, 63A Curve B, 400V AC, 72V DC
  • RS Stock No. 210-3350
  • Mfr. Part No. 5SL4163-6
Each
MYR141.46
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-4019
  • Mfr. Part No. 3VA2110-8HL36-0AA0
Each
MYR5,214.58
Better World
Siemens, SENTRON MCCB 4P 63A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3878
  • Mfr. Part No. 3VA2063-7JQ46-0AA0
Each
MYR12,871.83
ABB MCCB Molded Case Circuit Breaker 4P 400A, Fixed Mount
  • RS Stock No. 250-4077
  • Mfr. Part No. 1SDA054345R1
Each
MYR17,640.40
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 200 kA, Fixed Mount
  • RS Stock No. 270-4607
  • Mfr. Part No. 3VA2140-0KP42-0AA0
Each
MYR11,514.75
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3603
  • Mfr. Part No. 3VA2010-8HM32-0AA0
Each
MYR6,881.79
Littelfuse PC Board Non Resettable Fuse, Radial 125mA, 125V ac/dc
  • RS Stock No. 738-3084
  • Mfr. Part No. 0259.125T
Each
MYR19.12
ABB Emax2 Electronic Circuit Breaker 2kA 1SDA07, 4 channels
  • RS Stock No. 259-3747
  • Mfr. Part No. 1SDA071732R1
Each
MYR72,389.68
Better World
Siemens, SENTRON MCCB 4P 160A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 209-4922
  • Mfr. Part No. 3VA1116-4EF46-0AA0
Each
MYR6,361.08
ABB Emax2 Electronic Circuit Breaker 1.25kA Ekip Dip LI, 3 channels
  • RS Stock No. 259-4186
  • Mfr. Part No. 1SDA072301R1
Each
MYR28,714.23
Siemens ALPHA Distribution Board
  • RS Stock No. 272-0298
  • Mfr. Part No. 8GK1062-2KK31
Each
MYR6,485.64
Better World
Siemens SENTRON 3VA1 MCB, 2P, 50A
  • RS Stock No. 224-7861
  • Mfr. Part No. 3VA1150-3ED26-0AA0
Each
MYR1,474.71
RS PRO PC Board Non Resettable Fuse, Radial 125mA, 250V ac
  • RS Stock No. 767-5011
Each (In a Pack of 10)
MYR3.26
1
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