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

54 / 999+
In Stock
Mersen 40A Ceramic Cartridge Fuse, 22 x 58mm
  • RS Stock No. 188-7448
  • Mfr. Part No. J213609
Each (In a Pack of 10)
MYR27.002
In Stock
Eaton FAZ-NA MCB, 1P, 1.5A Curve C
  • RS Stock No. 230-1304
  • Mfr. Part No. 102079 FAZ-C1,5/1-NA
Each
MYR229.71
In Stock
Legrand DX Range DNX3 MCB, 32A Curve C, 4.5 kA Breaking Capacity
  • RS Stock No. 731-9459
  • Mfr. Part No. 4 067 77
Each
MYR195.23
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
In Stock
Better World
ABB System Pro M Compact S200 MCB, 2P, 2A Curve D, 400V AC, 125V DC, 10 kA Breaking Capacity
  • RS Stock No. 746-7848
  • Mfr. Part No. 2CDS252001R0021 S202-D2
Each
MYR335.17
Temporarily out of stock
ABB F200 RCCB, 40A, 2 Pole, 30mA, 230V ac
  • RS Stock No. 176-9633
  • Mfr. Part No. F202F-40/0.03
Each
MYR3,106.83
In Stock
Schurter 500mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 167-7673
  • Mfr. Part No. 34.1513
Each (In a Pack of 10)
MYR1.665
In Stock
Schneider Electric RCBO, 6A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type B, Resi9 Range
  • RS Stock No. 212-021
  • Mfr. Part No. R9D01606
Each
MYR857.41
Temporarily out of stock
Eaton 63A Fuse Holder for 109 x 35 x 159mm Fuse, 1P, 690V ac
  • RS Stock No. 261-372
  • Mfr. Part No. RS63PH
1 Pack of 10
MYR3,129.83
In Stock
RS PRO RC Suppressor Circuit for use with Contactors
  • RS Stock No. 277-8526
Each
MYR46.39
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 1P, 40A Curve B, 100 → 133V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3174
  • Mfr. Part No. A9F53140
Each
MYR226.37
In Stock
Schneider Electric, ComPacT NSX MCCB 4P 100A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 254-6287
  • Mfr. Part No. C10F4
Each
MYR1,852.92
Temporarily out of stock
ABB MCCB 4P 63A, Breaking Capacity 85 kA
  • RS Stock No. 192-0830
  • Mfr. Part No. 1SDA067847R1
Each
MYR7,783.29
In Stock
Better World
Schneider Electric Acti 9 4 Phase Busbar, 415V ac, 18mm Pitch
  • RS Stock No. 772-1543
  • Mfr. Part No. A9XPH424
Each (In a Pack of 5)
MYR523.162
In Stock
Better World
Schneider Electric Busbar Tap-Off Unit with Circuit Breaker, Canalis KS Series
  • RS Stock No. 211-0513
  • Mfr. Part No. KSB63SM48
Each
MYR653.43
In Stock
Better World
Schneider Electric Acti 9 iC60L MCB, 4P, 10A Curve C
  • RS Stock No. 247-1951
  • Mfr. Part No. A9F94410
Each
MYR422.71
In Stock
Siemens SIRIUS 3 Phase Busbar, 690V, 45mm Pitch
  • RS Stock No. 246-5128
  • Mfr. Part No. 3RV1915-1AB
Each
MYR51.27
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 2P, 4A Curve D, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3515
  • Mfr. Part No. A9F55204
Each
MYR883.47
Temporarily out of stock
Schneider Electric, ComPacT NSX Circuit breaker 2P 80A, Breaking Capacity 85 KA, Fixed Mount
  • RS Stock No. 119-217
  • Mfr. Part No. C10M2TM080
Each
MYR1,760.66
Temporarily out of stock
S201M-B10 Miniature Circuit Breaker
  • RS Stock No. 599-469
  • Mfr. Part No. 2CDS251001R0064
Each
MYR438.20
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