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

46580 Products showing for Fuses & Circuit Breakers

2318 / 999+
Temporarily out of stock
Better World
Siemens RCBO, 13A Current Rating, 2P Poles, 300mA Trip Sensitivity, Sentron Range
  • RS Stock No. 225-8774
  • Mfr. Part No. 5SU1654-6KK13
Each
MYR865.51
Temporarily out of stock
Better World
Siemens SENTRON 5SL4 MCB, 3+N, 10A Curve D, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 209-6544
  • Mfr. Part No. 5SL4610-8
Each
MYR878.44
Temporarily out of stock
Siemens Sentron Series Connector for use with Busbar
  • RS Stock No. 228-8211
  • Mfr. Part No. 5ST3792-1
Each (In a Pack of 10)
MYR34.338
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-4034
  • Mfr. Part No. 3VA2110-8JP46-0AA0
Each
MYR9,862.41
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3796
  • Mfr. Part No. 3VA2040-8HL46-0AA0
Each
MYR6,399.08
Temporarily out of stock
Siemens 20A Centred Tag Fuse, NH000, 690V
  • RS Stock No. 210-6940
  • Mfr. Part No. 3NA7807-6
Each (In a Pack of 3)
MYR258.913
In Stock
Schurter SMD Non Resettable Fuse 10A, 125 V dc, 250V ac
  • RS Stock No. 173-8124
  • Mfr. Part No. 3403.0176.24
1 Reel of 2000
MYR5,880.60
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 160A, Breaking Capacity 70 kA, Fixed Mount
  • RS Stock No. 271-9806
  • Mfr. Part No. 3VA1116-6GE46-0AA0
Each
MYR4,740.58
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3897
  • Mfr. Part No. 3VA2063-8HN36-0AA0
Each
MYR5,426.75
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3627
  • Mfr. Part No. 3VA2010-8KQ42-0AA0
Each
MYR12,394.29
In Stock
Bourns 40A Tag Fuse, 38mm, 170V dc, 24.1mm
  • RS Stock No. 254-4228
  • Mfr. Part No. PF-NT5-40
Each (In a Box of 10)
MYR114.129
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 160A, Breaking Capacity 70 kA
  • RS Stock No. 209-6978
  • Mfr. Part No. 3VA1116-6ED42-0AA0
Each
MYR4,539.94
Temporarily out of stock
Siemens 355A Centred Tag Fuse, NH3, 690V ac
  • RS Stock No. 203-1982
  • Mfr. Part No. 3NA3354-6
Each (In a Pack of 3)
MYR593.273
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 50A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 211-3739
  • Mfr. Part No. 3VA1150-5EF46-0AA0
Each
MYR2,781.54
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 5kA Ekip Dip LSI, 3 channels
  • RS Stock No. 259-3358
  • Mfr. Part No. 1SDA071273R1
Each
MYR213,451.67
Temporarily out of stock
Bourns 0.05A Resettable Fuse, 220V
  • RS Stock No. 692-6775P
  • Mfr. Part No. CMF-RL55A-0
Each (Supplied in a Bag)
MYR2.974
In Stock
Mersen 20A Ceramic Cartridge Fuse, 14 x 51mm
  • RS Stock No. 188-7369
  • Mfr. Part No. P218720
Each (In a Pack of 10)
MYR14.846
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 160A, Breaking Capacity 200 kA, Fixed Mount
  • RS Stock No. 270-4065
  • Mfr. Part No. 3VA2116-0KP42-0AA0
Each
MYR14,868.31
Temporarily out of stock
Siemens 8GB Door for use with Plug-in terminal
  • RS Stock No. 211-6097
  • Mfr. Part No. 8GB5024-4KM
Each
MYR338.44
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 16A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 271-9633
  • Mfr. Part No. 3VA10964ED460AA0
Each
MYR2,393.49
1
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