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

47265 Products showing for Fuses & Circuit Breakers

152 of 999+
In Stock
Littelfuse 6A F Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 738-3129
  • Mfr. Part No. 0KLK006.T
Each
HK$259.70
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 1.6kA, Breaking Capacity 42 kA, Fixed Mount
  • RS Stock No. 345-332
  • Mfr. Part No. C160H42AFM
Each
HK$156,628.72
In Stock
Better World
Schneider Electric TeSys Thermal Circuit Breaker - TeSyS GV 3 Pole 690V ac Voltage Rating, 80A Current Rating
  • RS Stock No. 175-1484
  • Mfr. Part No. GV4LE80B
Each
HK$2,352.70
In Stock
Littelfuse 0.125A Resettable Fuse, 30V dc
  • RS Stock No. 787-4186P
  • Mfr. Part No. 1206L012WR
Each (Supplied on a Reel)
HK$2.32
In Stock
ABB Surge Protector, DIN Rail Mount
  • RS Stock No. 136-3878
  • Mfr. Part No. 1SNA198729R0100
Each (In a Pack of 5)
HK$10.06
In Stock
Hager CDC RCD Switch, 40A, 4 Pole, 30mA, Type AC, 230 → 400V
  • RS Stock No. 599-743
  • Mfr. Part No. CDC447F
Each
HK$2,742.20
Currently unavailable
Schneider Electric Vigi iC60 RCD, 63A, 3 Pole, 30mA
  • RS Stock No. 230-6695
  • Mfr. Part No. A9V54363
Each
HK$5,378.84
In Stock
Littelfuse 1.5A Resettable Fuse, 6V dc
  • RS Stock No. 624-3130P
  • Mfr. Part No. NANOSMDC150F-2
Each (Supplied on a Reel)
HK$2.69
Temporarily out of stock
Schurter 6.3A Inline Fuse Holder for 6.3 x 32mm Fuse, 32V dc
  • RS Stock No. 173-7934
  • Mfr. Part No. 8601.2005
Each (In a Box of 50)
HK$11.712
In Stock
Littelfuse 0.125A Resettable Fuse, 30V dc
  • RS Stock No. 787-4186
  • Mfr. Part No. 1206L012WR
Each (In a Pack of 10)
HK$2.32
Temporarily out of stock
Schneider Electric PowerPact Thermal Magnetic Circuit Breaker - PowerPacT Single Pole 240V ac Voltage Rating Clip-On,
  • RS Stock No. 336-585
  • Mfr. Part No. BJL16020
Each
HK$3,955.00
In Stock
Better World
ABB System Pro M Compact S200 MCB, 2P, 40A Curve B, 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 746-7570
  • Mfr. Part No. 2CDS252001R0405 S202-B40
Each
HK$507.50
In Stock
Schurter 2A F Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 712-4759P
  • Mfr. Part No. 0090.0002
Each (Supplied in a Box)
HK$150.60
Temporarily out of stock
ABB S204L MCB, 4P, 10A Curve C, 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 204-251
  • Mfr. Part No. 2CDS244701R0104
Each
HK$1,529.12
In Stock
Europa EUC1P EUC MCB, 1P, 1A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 849-6493
  • Mfr. Part No. EUC1P1C
Each
HK$55.20
In Stock
Littelfuse 6A F Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 738-3129P
  • Mfr. Part No. 0KLK006.T
Each (Supplied in a Box)
HK$259.70
In Stock
Europa EUC1P EUC MCB, 1P, 4A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 849-6490
  • Mfr. Part No. EUC1P4C
Each
HK$67.30
In Stock
Mersen 20A Time Lag Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 630-856
  • Mfr. Part No. B233451Q
1 Box of 10
HK$82.05
In Stock
Better World
Schneider Electric Multi 9 MCB, 1P, 10A Curve D, 10 kA Breaking Capacity
  • RS Stock No. 219-9143
  • Mfr. Part No. M9F23110
Each
HK$100.90
Currently unavailable
Altech Thermal Circuit Breaker - V-EA 2 Pole 277V Voltage Rating DIN Rail Mount, 5A Current Rating
  • RS Stock No. 899-1806
  • Mfr. Part No. 2E5UM
Each
HK$295.90
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