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

62 / 999+
In Stock
Eaton xEffect MCB, 3P, 4A Curve C, 400V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 624-0383
  • Mfr. Part No. 278865 FAZ-C4/3
Each
MYR692.92
Temporarily out of stock
Eaton 125mA Cartridge Fuse, 10 x 126mm
  • RS Stock No. 849-5563
  • Mfr. Part No. HVJ-1-8
Each
MYR409.14
Temporarily out of stock
Schneider Electric Nsx100...250, Nsx400...630 LCD display for use with Micrologic 5 Trip Unit
  • RS Stock No. 221-1213
  • Mfr. Part No. LV429483
Each
MYR1,278.38
Temporarily out of stock
Siemens SENTRON 5SP4 MCB, 4P, 80A Curve D, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 209-6563
  • Mfr. Part No. 5SP4480-8
Each
MYR2,940.39
Temporarily out of stock
ABB MCCB 4P 160A, Breaking Capacity 65 kA
  • RS Stock No. 192-0843
  • Mfr. Part No. 1SDA067095R1
Each
MYR4,550.71
In Stock
Better World
Schneider Electric Acti 9 iC60N MCB, 2P, 40A Curve C, 440V AC, 125V DC, 6 kA Breaking Capacity
  • RS Stock No. 776-3474
  • Mfr. Part No. A9F77240
Each
MYR694.37
In Stock
Schurter Through-Hole Fuse, Radial 500mA, 60V dc
  • RS Stock No. 270-7980
  • Mfr. Part No. PFRA.050
Each
MYR3.69
In Stock
Hinode Electric Co Ltd 160A Bolted Tag Fuse, 77mm
  • RS Stock No. 103-4252
  • Mfr. Part No. 660GH-160
Each
MYR211.83
In Stock
Better World
ABB System Pro M Compact S200 MCB, 3P, 16A Curve K, 440V AC, 20 kA Breaking Capacity
  • RS Stock No. 514-0226
  • Mfr. Part No. 2CDS253001R0467 S203-K16
Each
MYR582.20
In Stock
Schurter 1A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 789-7797
  • Mfr. Part No. 0001.2504
Each (In a Bag of 10)
MYR2.518
In Stock
Eaton xEffect FAZ MCB, 1P, 1A Curve C, 240V AC, 48V DC, 10 kA Breaking Capacity
  • RS Stock No. 922-6995
  • Mfr. Part No. 278546 FAZ-C1/1
Each
MYR128.67
In Stock
Eaton 5A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 537-1408
Each (In a Pack of 10)
MYR1.165
Temporarily out of stock
Phoenix Contact 2 Phase Surge Protector, 40kA, DIN Rail Mount
  • RS Stock No. 201-6717
  • Mfr. Part No. 2905350
Each
MYR1,157.93
Temporarily out of stock
Schneider Electric ComPact Control Plate for use with ComPact NS, ComPact NSX, MasterPact NT, MasterPact NT Switch
  • RS Stock No. 247-1722
  • Mfr. Part No. 29364
Each
MYR2,913.39
Temporarily out of stock
Schneider Electric, ComPacT New Generation MCCB 4P 160A, Fixed Mount
  • RS Stock No. 260-7750
  • Mfr. Part No. C16B4TM160
Each
MYR6,753.51
In Stock
Legrand 1A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 180-6104
  • Mfr. Part No. 0 102 10
Each (In a Box of 10)
MYR8.786
In Stock
Better World
ABB SN201 MCB, 1P, 4A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 231-9976
  • Mfr. Part No. 2CSS275101R0044 SN201 M-C4 -
1 Box of 1
MYR228.44
In Stock
Eaton 110A British Standard Fuse, 660V, 72mm
  • RS Stock No. 414-932
  • Mfr. Part No. GSGB110
Each (In a Pack of 5)
MYR364.696
Temporarily out of stock
Better World
Schneider Electric EZ9 RCCB, 63A, 2 Pole, 30mA, Type AC, 230V ac
  • RS Stock No. 850-8583
  • Mfr. Part No. EZ9R33263
Each
MYR116.79
In Stock
Better World
Schneider Electric iC60 RCD, 25A, 30mA
  • RS Stock No. 776-2916
  • Mfr. Part No. A9Q31425
Each
MYR2,408.42
Results per page
1
62
2329

Related links