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

2309 / 999+
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3816
  • Mfr. Part No. 3VA2040-8KP42-0AA0
Each
MYR10,899.16
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.25kA Ekip Touch LSIG, 4 channels
  • RS Stock No. 259-4671
  • Mfr. Part No. 1SDA072946R1
Each
MYR44,790.62
Temporarily out of stock
Better World
Siemens RCBO, 10A Current Rating, 2P Poles, 30mA Trip Sensitivity, Sentron Range
  • RS Stock No. 225-8746
  • Mfr. Part No. 5SU1354-6LB10
Each
MYR1,495.33
Temporarily out of stock
Siemens SENTRON Cover for use with 3VA1 100/160
  • RS Stock No. 210-9297
  • Mfr. Part No. 3VA9153-0KB05
Each
MYR239.70
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 16A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 271-9629
  • Mfr. Part No. 3VA10963ED420AA0
Each
MYR2,082.46
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 2kA Ekip Touch LI, 3 channels
  • RS Stock No. 259-3226
  • Mfr. Part No. 1SDA071104R1
Each
MYR56,685.14
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 25A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 270-3641
  • Mfr. Part No. 3VA2025-5JQ46-0AA0
Each
MYR11,016.94
Temporarily out of stock
Siemens 8A T Cartridge Fuse, 10 x 38mm
  • RS Stock No. 232-2035
  • Mfr. Part No. 3NW3080-0HG
Each (In a Pack of 10)
MYR123.271
Temporarily out of stock
Siemens SENTRON Wire Connector for use with 3VA9603-0KP00
  • RS Stock No. 269-7219
  • Mfr. Part No. 3VA9603-0JJ25
Each (In a Pack of 3)
MYR638.037
Temporarily out of stock
Siemens Sentron Connector Link for use with Busbar System
  • RS Stock No. 228-8259
  • Mfr. Part No. 8US1998-1AA10
Each (In a Pack of 50)
MYR4.605
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 211-3784
  • Mfr. Part No. 3VA2125-6HN36-0AA0
Each
MYR4,495.73
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 630A 1SDA07, 3 channels
  • RS Stock No. 259-4009
  • Mfr. Part No. 1SDA072068R1
Each
MYR32,141.55
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1kA Ekip Dip LSI, 3 channels
  • RS Stock No. 259-4049
  • Mfr. Part No. 1SDA072132R1
Each
MYR17,410.11
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4647
  • Mfr. Part No. 3VA2140-7HK46-0AA0
Each
MYR5,681.66
Temporarily out of stock
Schneider Electric, ComPacT New Generation MCCB 3P 160A, Fixed Mount
  • RS Stock No. 260-7819
  • Mfr. Part No. C16S3D
Each
MYR3,367.70
Temporarily out of stock
Better World
Siemens SENTRON 3VA1 MCB, 3P, 8A
  • RS Stock No. 224-7783
  • Mfr. Part No. 3VA1108-5MG36-0AA0
Each
MYR2,113.83
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 800A Ekip Touch LI, 4 channels
  • RS Stock No. 259-4502
  • Mfr. Part No. 1SDA072724R1
Each
MYR20,566.75
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 1.25kA 1SDA07, 3 channels
  • RS Stock No. 259-9955
  • Mfr. Part No. 1SDA070834R1
Each
MYR25,254.06
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1kA Ekip Touch LI, 3 channels
  • RS Stock No. 259-4062
  • Mfr. Part No. 1SDA072144R1
Each
MYR16,453.51
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 63A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 270-3831
  • Mfr. Part No. 3VA2063-5JP46-0AA0
Each
MYR6,781.62
1
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