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

46580 Products showing for Fuses & Circuit Breakers

88 / 999+
Temporarily out of stock
Better World
Siemens 3VA911 RCD, 160A, 3 Pole, Type A
  • RS Stock No. 210-9286
  • Mfr. Part No. 3VA9113-0RS20
Each
MYR6,579.14
In Stock
SIBA 2A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 783-3355
  • Mfr. Part No. 70-059-60/2A
Each (In a Pack of 10)
MYR3.533
In Stock
RS PRO 2A FF Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 420-167
Each (In a Pack of 10)
MYR10.689
In Stock
Eaton 30A Bolt In Mount 6.3 x 32mm Fuse Block, 300V ac/dc
  • RS Stock No. 852-7231
  • Mfr. Part No. S-8301-1-R
Each
MYR34.25
Temporarily out of stock
Phoenix Contact Thermal Circuit Breaker - TCP 0.5A Single Pole 65 V dc, 250V ac Voltage Rating, 500mA Current Rating
  • RS Stock No. 170-3785
  • Mfr. Part No. 0712152
Each (In a Box of 20)
MYR80.22
Temporarily out of stock
Siemens, SENTRON MCCB 3P 150A, Breaking Capacity 7 kA, Fixed Mount
  • RS Stock No. 147-913
  • Mfr. Part No. 3VA5215-5EF31-2AA0
Each
MYR7,672.88
Temporarily out of stock
Schneider Electric, ComPacT New Generation MCCB 4P 30A, Breaking Capacity 25 kA, Screw Mount
  • RS Stock No. 244-919
  • Mfr. Part No. BDL46030LU
Each
MYR2,771.26
In Stock
Better World
Schneider Electric Easy 9 EZ9 MCB, 1P, 20A Curve B, 230V AC, 6 kA Breaking Capacity
  • RS Stock No. 850-8606
  • Mfr. Part No. EZ9F16120
Each
MYR28.12
In Stock
Better World
Schneider Electric RCBO, 50A Current Rating, 1P+N Poles, Type AB, Easy9 Range
  • RS Stock No. 850-8666
  • Mfr. Part No. EZ9D16850
Each
MYR163.60
Temporarily out of stock
Socomec 63A Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 172-3022
  • Mfr. Part No. 66000063
1 Box of 3
MYR193.69
In Stock
Schneider Electric Acti9 1 Phase Distribution Board, 6 Way, 125 A
  • RS Stock No. 244-967
  • Mfr. Part No. SE125A6
Each
MYR729.90
In Stock
RS PRO Residential RCCBs, 40A, 4 Pole, 30mA, Type A, 400V
  • RS Stock No. 284-2373
Each
MYR433.28
In Stock
Eaton 100A Rail Mount Fuse Holder for A4 Fuse, 1P, 690V ac
  • RS Stock No. 221-651
  • Mfr. Part No. RS100P
Each
MYR553.93
In Stock
Eaton 6.3A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 169-9451
  • Mfr. Part No. S500-6.3-R
1 Bag of 1000
MYR1,019.20
Temporarily out of stock
Schurter 2A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 173-8055
  • Mfr. Part No. 8020.5014.G
1 Box of 1000
MYR2,831.00
In Stock
Better World
Schneider Electric Acti 9 C60H-DC MCB, 1P, 2A Curve C, 250V DC
  • RS Stock No. 772-1505
  • Mfr. Part No. A9N61502
Each
MYR258.15
Temporarily out of stock
50A Cartridge Fuse, 51 x 292mm
  • RS Stock No. 262-323
  • Mfr. Part No. 7.2TDLSJ50
1 Pack of 3
MYR3,526.88
Temporarily out of stock
Europa Busbar
  • RS Stock No. 849-6285
  • Mfr. Part No. ECUBB18
Each
MYR49.79
In Stock
Mersen 50A Rail Mount Fuse Holder for 14 x 51mm Fuse, N, 690V ac
  • RS Stock No. 768-3750
  • Mfr. Part No. T331056
Each
MYR99.02
In Stock
Eaton 3A T Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 848-4153
  • Mfr. Part No. LP-CC-3
Each
MYR316.83
1
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