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

2319 / 999+
In Stock
Better World
Siemens SENTRON Cover for use with 3VA1 400/630 and 3VA2 400/630
  • RS Stock No. 210-9403
  • Mfr. Part No. 3VA9481-0WF40
Each
MYR356.32
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 200 kA, Fixed Mount
  • RS Stock No. 270-4518
  • Mfr. Part No. 3VA2125-0MQ32-0AA0
Each
MYR8,287.73
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 50A, Fixed Mount
  • RS Stock No. 260-7559
  • Mfr. Part No. C11E3TM050B
Each
MYR1,710.49
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 4kA Ekip Dip LSI, 3 channels
  • RS Stock No. 259-3325
  • Mfr. Part No. 1SDA071232R1
Each
MYR110,749.50
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 4kA 1SDA07, 3 channels
  • RS Stock No. 259-4392
  • Mfr. Part No. 1SDA072574R1
Each
MYR139,482.29
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 16A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 271-9451
  • Mfr. Part No. 3VA1196-3GF42-0AA0
Each
MYR2,192.25
Temporarily out of stock
Better World
Siemens SENTRON 3VA1 MCB, 3P, 1A
  • RS Stock No. 224-7893
  • Mfr. Part No. 3VA1181-5MG32-0AA0
Each
MYR1,498.24
Temporarily out of stock
Siemens 40A Centred Tag Fuse, NH1, 500V
  • RS Stock No. 230-2939
  • Mfr. Part No. 3NA3117
Each (In a Pack of 3)
MYR70.41
Temporarily out of stock
Siemens 100A Centred Tag Fuse, NH1, 690V
  • RS Stock No. 230-2950
  • Mfr. Part No. 3NA6130-6
Each (In a Pack of 3)
MYR362.51
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3570
  • Mfr. Part No. 3VA2010-7HL46-0AA0
Each
MYR5,036.24
Last RS stock
Schurter PC Board Non Resettable Fuse, Axial 7A, 125V ac/dc
  • RS Stock No. 110-8559
  • Mfr. Part No. 7010.7140.13
Each (In a Pack of 5)
MYR6.624
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 3.2kA Ekip Dip LSI, 3 channels
  • RS Stock No. 259-4337
  • Mfr. Part No. 1SDA072503R1
Each
MYR89,023.40
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 160A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-4121
  • Mfr. Part No. 3VA2116-8HL42-0AA0
Each
MYR9,797.64
Temporarily out of stock
Better World
Siemens SENTRON 5SL4 MCB, 3+N, 300mA Curve D, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 209-6507
  • Mfr. Part No. 5SL4414-8
Each
MYR995.59
Temporarily out of stock
Better World
Schneider Electric MCCB 3P, Fixed Mount
  • RS Stock No. 178-7891
  • Mfr. Part No. LV426946
Each
MYR248.69
Temporarily out of stock
Schurter SMD Non Resettable Fuse 2A, 250V ac
  • RS Stock No. 173-9885
  • Mfr. Part No. 3403.0119.11
Each (In a Bag of 100)
MYR3.762
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-4705
  • Mfr. Part No. 3VA2163-0MN36-0AA0
Each
MYR5,080.82
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 32A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 271-9583
  • Mfr. Part No. 3VA10323ED360AA0
Each
MYR1,805.15
Temporarily out of stock
Siemens ALPHA Mounting Plate for use with ALPHA DIN Installation Distributor
  • RS Stock No. 272-0346
  • Mfr. Part No. 8GK4452-1KK12
Each
MYR370.17
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 209-4841
  • Mfr. Part No. 3VA1025-4ED32-0AA0
Each
MYR1,544.60
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