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
Fuses - PCB
Fuses - PCB

46578 Products showing for Fuses & Circuit Breakers

212 / 999+
Temporarily out of stock
Siemens SENTRON External Current Sensor
  • RS Stock No. 277-0702
  • Mfr. Part No. 3WA9111-0AA21
Each
MYR2,586.56
In Stock
Better World
Siemens 5sV3 RCCB, 63A, 2 Pole, 100mA, Type A, 230V ac
  • RS Stock No. 211-9662
  • Mfr. Part No. 5SV3416-6
Each
MYR1,175.66
In Stock
Schurter SMD Non Resettable Fuse 3.15A, 125V ac/dc
  • RS Stock No. 131-432
  • Mfr. Part No. 3404.0048.11
Each (In a Pack of 10)
MYR3.772
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 1kA, Breaking Capacity 31 kA, Fixed Mount
  • RS Stock No. 341-494
  • Mfr. Part No. C100H45AFM
Each
MYR76,938.57
Temporarily out of stock
Siemens SENTRON 5SY6 MCB, 1P, 15A Curve C, 400V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 610-636
  • Mfr. Part No. 5SY6118-7
Each
MYR168.81
Temporarily out of stock
Better World
Schneider Electric Busbar Tap-Off Unit with Circuit Breaker, Canalis KS Series
  • RS Stock No. 211-0501
  • Mfr. Part No. KSB250DC5
Each
MYR7,835.94
Temporarily out of stock
Eaton IZMX/INX Electronic Circuit Breaker 1.6kA IZMX/INX, 4 channels , Fixed
  • RS Stock No. 132-715
  • Mfr. Part No. 183774 IZMX40H4-P16F-1
Each
MYR97,978.49
In Stock
Schneider Electric 440V ac Circuit Breaker Circuit Trip for use with Circuits
  • RS Stock No. 130-545
  • Mfr. Part No. C11E34V100L
Each
MYR10,452.34
Temporarily out of stock
Siemens ALPHA Feeder Terminal for use with Distribution boards
  • RS Stock No. 216-5996
  • Mfr. Part No. 8WA2870
Each (In a Pack of 50)
MYR10.101
Temporarily out of stock
ABB Tmax XT Plug In Unit for use with XT2
  • RS Stock No. 236-6641
  • Mfr. Part No. 1SDA068197R1 XT4 P FP HR
Each
MYR1,641.22
Temporarily out of stock
Siemens SENTRON 3 Phase Busbar, 26.4mm Pitch
  • RS Stock No. 328-501
  • Mfr. Part No. 5ST3714-3HG
Each
MYR740.50
In Stock
Siemens 63A Bolted Tag Fuse, NH000, 690V
  • RS Stock No. 210-6982
  • Mfr. Part No. 3NE8718-1
Each (In a Pack of 10)
MYR329.157
Temporarily out of stock
ABB DDA200 RCD, 25A, 2 Pole, 30mA, Type AC
  • RS Stock No. 183-3648
  • Mfr. Part No. 2CSB202001R1250
Each
MYR734.96
In Stock
Better World
ABB System Pro M Compact S200 MCB, 2P, 6A Curve B, 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 746-7558
  • Mfr. Part No. 2CDS252001R0065 S202-B6
Each
MYR288.85
Temporarily out of stock
Schneider Electric, ComPacT NSX Circuit breaker 4P 25A, Breaking Capacity 85 KA, Fixed Mount
  • RS Stock No. 119-468
  • Mfr. Part No. C11F44V025B
Each
MYR7,469.61
In Stock
Schneider Electric, ComPacT MCCB 4P 250A, Breaking Capacity 40 kA, Fixed Mount
  • RS Stock No. 260-7867
  • Mfr. Part No. C25B4
Each
MYR5,692.61
In Stock
Wickmann Panel Mount Fuse Holder
  • RS Stock No. 174-0734
  • Mfr. Part No. 03420004HXL
Each (In a Pack of 5)
MYR18.876
In Stock
Better World
ABB System Pro M Compact S200M MCB, 2P, 40A Curve C, 440V AC, 125V DC, 10 kA Breaking Capacity
  • RS Stock No. 131-905
  • Mfr. Part No. 2CDS272001R0404 S202M-C40
Each
MYR326.68
In Stock
Littelfuse 60A Inline Fuse Holder for Maxi Fuse
  • RS Stock No. 787-4375
  • Mfr. Part No. 01520001TXN940
Each
MYR52.89
In Stock
Eaton 15A T Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 848-3894
  • Mfr. Part No. FNM-15
Each
MYR135.06
1
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