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

225 of 999+
In Stock
ABB High Performance S800C MCB, 2P, 80A Curve B
  • RS Stock No. 231-9575
  • Mfr. Part No. 2CCG001217R0001
Each
HK$1,132.00
Temporarily out of stock
Siemens SENTRON 3VA9 Cover for use with 3VA1 250
  • RS Stock No. 218-1813
  • Mfr. Part No. 3VA9211-0WG40
Each
HK$433.80
Temporarily out of stock
Eaton 5A Cartridge Fuse
  • RS Stock No. 228-695
  • Mfr. Part No. FNQ-5
1 Pack of 10
HK$5,383.10
In Stock
Hager 3 Phase Busbar
  • RS Stock No. 144-4832
  • Mfr. Part No. KB463A
Each
HK$459.89
In Stock
Mersen 160mA FA Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 188-6518
  • Mfr. Part No. F084001
Each (In a Pack of 10)
HK$66.77
In Stock
Better World
Schneider Electric Acti9 iIG40K RCCB, 40A, 1+N Pole, 30mA, Type AC, 220 → 240V ac
  • RS Stock No. 238-3469
  • Mfr. Part No. A9R69640
Each
HK$1,269.18
Temporarily out of stock
Better World
Siemens SIRIUS Electronic Circuit Breaker 250mA 3RV2, 3 channels , DIN Rail Mount
  • RS Stock No. 160-106
  • Mfr. Part No. 3RV2411-0CA15
Each
HK$737.50
Temporarily out of stock
Better World
Siemens SIRIUS Electronic Circuit Breaker 100A 3RV2, 3 channels , DIN Rail Mount
  • RS Stock No. 160-050
  • Mfr. Part No. 3RV2041-4MA10-0DA0
Each
HK$3,070.90
Temporarily out of stock
Phoenix Contact CB Electronic Circuit breaker 10A 24V CB E1, On Base Element
  • RS Stock No. 855-7393
  • Mfr. Part No. 2800914
Each
HK$429.60
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 3.2kA 1SDA07, 3 channels
  • RS Stock No. 259-4338
  • Mfr. Part No. 1SDA072504R1
Each
HK$148,185.67
In Stock
Littelfuse 7.5A Brown Blade Car Fuse, 32V dc
  • RS Stock No. 787-4237
  • Mfr. Part No. 029707.5L
Each (In a Pack of 5)
HK$2.94
Temporarily out of stock
Siemens SENTRON 5SY8 MCB, 4P, 40A Curve C, 400V AC, 60V DC, 25 kA Breaking Capacity
  • RS Stock No. 610-568
  • Mfr. Part No. 5SY8640-7
Each
HK$3,225.50
Temporarily out of stock
Siemens SENTRON 5SJ4220 MCB, 2P, 20A Curve D, 400V AC, 60V DC, 14 kA Breaking Capacity
  • RS Stock No. 299-868
  • Mfr. Part No. 5SJ4220-8HG41
Each
HK$1,479.30
In Stock
Littelfuse 200A Grey, White CF Car Fuse, 58V dc
  • RS Stock No. 337-7971
  • Mfr. Part No. 155.0892.6201
Each
HK$94.20
Temporarily out of stock
Better World
Schneider Electric Acti 9 iC60H MCB, 3P, 10A Curve B, 440V AC, 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 776-2146
  • Mfr. Part No. A9F06310
Each
HK$491.90
Temporarily out of stock
Legrand DX Range DX3 MCB, 4P, 20A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 731-9755
  • Mfr. Part No. 4 078 99
Each
HK$1,876.02
Temporarily out of stock
Schneider Electric, PowerPact multistandard Circuit Breaker Accessory 3P 60A, Breaking Capacity 65 KA
  • RS Stock No. 119-532
  • Mfr. Part No. NHGF36060U31XTW
Each
HK$19,187.64
In Stock
Schurter Thermal Circuit Breaker - T11 Single Pole 240V ac Voltage Rating, 1.5A Current Rating
  • RS Stock No. 173-9813
  • Mfr. Part No. 4400.0056
Each (In a Box of 100)
HK$57.247
Temporarily out of stock
Better World
Siemens SIRIUS Electronic Circuit Breaker 75A 3RV2, 3 channels , DIN Rail Mount
  • RS Stock No. 160-142
  • Mfr. Part No. 3RV2342-4KC10
Each
HK$3,439.70
Temporarily out of stock
WAGO Electronic Circuit Breaker 6A 24V 787, 2 channels , DIN Rail
  • RS Stock No. 279-4096
  • Mfr. Part No. 787-1662/006-1000
Each
HK$1,320.10
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