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

2222 / 999+
Temporarily out of stock
Siemens Sentron Connecting Terminals for use with Busbar
  • RS Stock No. 228-8203
  • Mfr. Part No. 5ST2157
Each (In a Pack of 5)
MYR48.752
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 3.2kA 1SDA07, 3 channels
  • RS Stock No. 259-3254
  • Mfr. Part No. 1SDA071152R1
Each
MYR73,690.60
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 160A, Fixed Mount
  • RS Stock No. 260-7869
  • Mfr. Part No. C25B42D160
Each
MYR9,822.14
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1kA 1SDA07, 4 channels
  • RS Stock No. 259-3583
  • Mfr. Part No. 1SDA071560R1
Each
MYR60,866.83
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 200 kA, Fixed Mount
  • RS Stock No. 270-3945
  • Mfr. Part No. 3VA2110-0MS36-0AA0
Each
MYR4,020.93
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4669
  • Mfr. Part No. 3VA2140-7KP36-0AA0
Each
MYR10,664.21
In Stock
Bourns 50A Tag Fuse, 66mm, 240 V ac, 150V dc, 24.1mm
  • RS Stock No. 254-4212
  • Mfr. Part No. PF-MB1-50
Each
MYR321.84
In Stock
RS PRO Non-Resettable Surface Mount Fuse 50A, 80V
  • RS Stock No. 240-8275
Each (In a Pack of 10)
MYR16.739
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.25kA 1SDA07, 4 channels
  • RS Stock No. 259-4682
  • Mfr. Part No. 1SDA072959R1
Each
MYR63,468.74
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 5kA 1SDA07, 4 channels
  • RS Stock No. 259-3876
  • Mfr. Part No. 1SDA071898R1
Each
MYR204,251.92
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 3.2kA Ekip Touch LSIG, 3 channels
  • RS Stock No. 259-3257
  • Mfr. Part No. 1SDA071156R1
Each
MYR77,314.75
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 40A, Fixed Mount
  • RS Stock No. 260-7526
  • Mfr. Part No. C11B3TM040B
Each
MYR2,200.54
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 800A Ekip Touch LSIG, 3 channels
  • RS Stock No. 259-3051
  • Mfr. Part No. 1SDA070906R1
Each
MYR35,219.21
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 630A, Fixed Mount
  • RS Stock No. 260-8261
  • Mfr. Part No. C63W36E630
Each
MYR34,898.79
In Stock
Better World
Siemens SENTRON 5SL4 MCB, 2P, 25A Curve C, 400V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 209-5970
  • Mfr. Part No. 5SL4225-7
Each
MYR436.15
Temporarily out of stock
Better World
Siemens SENTRON Wire Connector for use with 3VA5/6 400/600
  • RS Stock No. 269-7181
  • Mfr. Part No. 3VA9374-0JB13
Each (In a Pack of 4)
MYR258.688
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 270-3639
  • Mfr. Part No. 3VA2025-5JQ36-0AA0
Each
MYR9,611.72
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-4042
  • Mfr. Part No. 3VA2110-8KP36-0AA0
Each
MYR9,862.41
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 210-1703
  • Mfr. Part No. 3VA2040-5HN32-0AA0
Each
MYR3,470.41
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 12.5A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 209-5049
  • Mfr. Part No. 3VA1192-5MG32-0AA0
Each
MYR1,498.24
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