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

47266 Products showing for Fuses & Circuit Breakers

31 of 999+
In Stock
Better World
Schneider Electric Rail Mount Fuse Holder for 10 x 38mm Fuse, 1P
  • RS Stock No. 188-4687
  • Mfr. Part No. DF101
Each
HK$51.60
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 1P, 4A Curve C, 100 → 133V AC, 72V DC, 70 kA Breaking Capacity
  • RS Stock No. 791-3281
  • Mfr. Part No. A9F54104
Each
HK$218.60
In Stock
Eaton 32A British Standard Fuse, A1, 415V ac, 42.5mm
  • RS Stock No. 139-906
  • Mfr. Part No. NITD32M40
Each (In a Pack of 5)
HK$76.24
In Stock
Better World
Schneider Electric 2A Cartridge Fuse, 10 x 38mm
  • RS Stock No. 181-2608
  • Mfr. Part No. DF2CA02
Each (In a Box of 10)
HK$46.38
Temporarily out of stock
Better World
Siemens SENTRON 5SY7 MCB, 3+N, 16A Curve C
  • RS Stock No. 216-5946
  • Mfr. Part No. 5SY7616-7
Each
HK$1,475.30
In Stock
RS PRO 0.05A Resettable Fuse, 30V dc
  • RS Stock No. 279-6766
Each (In a Pack of 10)
HK$3.037
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 2kA 1SDA07, 4 channels
  • RS Stock No. 259-3691
  • Mfr. Part No. 1SDA071665R1
Each
HK$90,675.97
In Stock
RS PRO Earthing Strap Copper 75 x 13mm Diameter
  • RS Stock No. 264-9219
Each (In a Pack of 5)
HK$28.28
In Stock
Better World
Schneider Electric NSX Motor Mechanism for use with ComPact NSX250
  • RS Stock No. 213-1346
  • Mfr. Part No. LV431546
Each
HK$12,200.98
Currently unavailable
Bourns 1.5A Resettable Fuse, 15V
  • RS Stock No. 245-9142P
  • Mfr. Part No. MF-LSMF150X-2
Each (Supplied on a Reel)
HK$4.37
Temporarily out of stock
Better World
Siemens 3VA93 RCD, 400A, 3 Pole, Type A
  • RS Stock No. 218-1845
  • Mfr. Part No. 3VA9323-0RL30
Each
HK$16,173.00
In Stock
ABB DDA 200 A RCD, 25A, 3 Pole, 30mA, Type A, 230/400V ac
  • RS Stock No. 610-3868
  • Mfr. Part No. 2CSB203101R1250 - DDA203A-25/0.03
Each
HK$862.10
Temporarily out of stock
ABB RCBO, 40A Current Rating, 2P Poles, 30mA Trip Sensitivity, System Pro M Compact Range
  • RS Stock No. 201-6943
  • Mfr. Part No. 2CSR255080R1405 DS201 B40 AC30
Each
HK$1,034.00
In Stock
WJ Furse Lightning Earth Inspection Pit W. 300mm x 300mm H. 158mm 5000kg
  • RS Stock No. 124-2510
  • Mfr. Part No. 7TCA083320R0011 PT205
Each
HK$374.70
Temporarily out of stock
Siemens 630A Solid Link for LV HRC Fuses
  • RS Stock No. 395-711
  • Mfr. Part No. 3NG1402
Each
HK$602.90
In Stock
Eaton 30A Rail Mount Fuse Holder for 10 x 38mm Fuse, 3P, 600V ac
  • RS Stock No. 182-1817
  • Mfr. Part No. CHCC3DIU
Each
HK$1,350.00
In Stock
Bourns 1.6A Resettable Fuse, 30V
  • RS Stock No. 647-8550
  • Mfr. Part No. MF-R160
Each (In a Pack of 10)
HK$2.96
Temporarily out of stock
Better World
ABB, XT4H MCCB 4P 100A, Fixed Mount
  • RS Stock No. 236-6797
  • Mfr. Part No. 1SDA068538R1 XT4H 160 Ekip I 100A FF
Each
HK$10,362.40
In Stock
Sato Parts 10A Panel Mount Fuse Holder for 6.4 x 30mm Fuse, 250V ac
  • RS Stock No. 627-2093
  • Mfr. Part No. F-4000-A
Each (In a Pack of 5)
HK$31.48
In Stock
ABB PS Cover for use with DDA200, F200, S200
  • RS Stock No. 225-5980
  • Mfr. Part No. 2CDL200001R0001 PS-END
Each
HK$16.90
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