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

2320 / 999+
Temporarily out of stock
Schneider Electric, PowerPact MCCB 3P 100A, Breaking Capacity 18 kA, Clip-On
  • RS Stock No. 345-257
  • Mfr. Part No. BDF36100
Each
MYR4,168.20
In Stock
Better World
Schneider Electric Acti 9 A9N1 MCB, 2P, 80A Curve C
  • RS Stock No. 219-8295
  • Mfr. Part No. A9N18457
Each
MYR1,351.87
Temporarily out of stock
Schurter Thermal Circuit Breaker - T12 Single Pole 28 V dc, 240V ac Voltage Rating Panel Mount, 10A Current Rating
  • RS Stock No. 173-8099
  • Mfr. Part No. 4410.9001
Each (In a Box of 10)
MYR183.665
Temporarily out of stock
Sensata Airpax Airpax Thermal Circuit Breaker - LEGF6 Single Pole Panel Mount, 10A Current Rating
  • RS Stock No. 275-0350
  • Mfr. Part No. LEGF6-1-62-10.0-A-01-V
Each
MYR223.65
Temporarily out of stock
Eaton IZMX/INX Electronic Circuit Breaker 1.6kA IZMX/INX, 4 channels , Fixed
  • RS Stock No. 127-529
  • Mfr. Part No. 183461 IZMX16B4-P16W-1
Each
MYR72,713.23
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
Temporarily out of stock
Legrand DX3 Circuit Breaker, 1+N, 3A, Type AC, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 266-1359
  • Mfr. Part No. 411364
Each
MYR2,819.12
Temporarily out of stock
ABB SMISSLINE Busbar for Smissline TP
  • RS Stock No. 246-2346
  • Mfr. Part No. 2CCF800257R0001
Each
MYR116.68
Temporarily out of stock
ABB 16A Tag Fuse, 79 x 21 x 53mm, 500V
  • RS Stock No. 250-4356
  • Mfr. Part No. 1SCA022652R0790
1 Box of 3
MYR162.53
In Stock
ABB Current Transformer for use with S4, S5, S6, S7, T1, T2, T3, T4, T5, T6, T7, XT2, XT3, XT4, XT7-XT7M, XXT7-XT7M
  • RS Stock No. 250-4511
  • Mfr. Part No. 1SDA037395R1
Each
MYR2,961.52
In Stock
Better World
Siemens Sentron 5SY4 MCB, 1P, 2A Curve D, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 772-1246
  • Mfr. Part No. 5SY4102-8
Each
MYR181.86
Temporarily out of stock
Better World
Schneider Electric iC60 RCD, 25A, 100mA
  • RS Stock No. 776-8762
  • Mfr. Part No. A9V12425
Each
MYR3,520.40
In Stock
Bourns 1.8A Resettable Fuse, 33V
  • RS Stock No. 691-7594
  • Mfr. Part No. MF-SM185/33-2
Each (In a Pack of 5)
MYR1.90
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 800A, Breaking Capacity 30 kA, Fixed Mount
  • RS Stock No. 432-849
  • Mfr. Part No. C080H32EFM
Each
MYR46,541.62
In Stock
Eaton 20A gG/gL Cartridge Fuse, 10 x 38mm
  • RS Stock No. 229-101
  • Mfr. Part No. C10G20 CYLINDRICAL FUSE 10 x 38 20A GG 500V AC
1 Pack of 10
MYR47.67
Limited stock
Better World
Siemens SENTRON 5SY4 MCB, 3P, 32A Curve C, 440V AC, 10 kA Breaking Capacity
  • RS Stock No. 383-2153
  • Mfr. Part No. 5SY4332-7
Each
MYR711.95
Temporarily out of stock
Eaton RCBO, 16A Current Rating, 2P Poles, 100mA Trip Sensitivity, Type A, Type C, FRBmM Range
  • RS Stock No. 123-332
  • Mfr. Part No. 170822 FRBMM-C16/2/01-A
Each
MYR680.57
Temporarily out of stock
Siemens, SENTRON MCCB 4P 600A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 249-879
  • Mfr. Part No. 3VA6560-5JP42-0AA0
Each
MYR28,897.18
Temporarily out of stock
Better World
Schneider Electric Acti9 iIG40 RCCB, 63A, 1+N Pole, 30mA, Type AC, 220 → 240V ac
  • RS Stock No. 238-3479
  • Mfr. Part No. A9R87663
Each
MYR1,801.38
New product - Preorder today
Schneider Electric ComPacT Trip Unit for use with ComPacT NSX250
  • RS Stock No. 654-148
  • Mfr. Part No. C253MG250
Each
MYR1,318.01
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