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

18 of 999+
In Stock
Eaton 100A Ceramic Cartridge Fuse, 22 x 58mm
  • RS Stock No. 703-8475
  • Mfr. Part No. C22G100
Each (In a Pack of 10)
HK$30.91
In Stock
Better World
Schneider Electric Acti 9 Cover for use with Linergy FH Horizontal Comb Busbar
  • RS Stock No. 776-2831
  • Mfr. Part No. A9XPT920
Each
HK$87.30
Temporarily out of stock
Better World
Schneider Electric 10A Cartridge Fuse, 10 x 38mm
  • RS Stock No. 181-2611
  • Mfr. Part No. DF2CA10
Each (In a Box of 10)
HK$50.71
Currently unavailable
Altech Thermal Circuit Breaker - V-EA 2 Pole 277V Voltage Rating DIN Rail Mount, 2.5A Current Rating
  • RS Stock No. 899-1765
  • Mfr. Part No. 2E2.5UM
Each
HK$295.90
Limited stock
Better World
Schneider Electric 125A Rail Mount Fuse Holder for 22 x 58mm Fuse, 2P, 690V ac
  • RS Stock No. 482-689
  • Mfr. Part No. DF222
Each
HK$362.40
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 320A, Fixed Mount
  • RS Stock No. 260-8122
  • Mfr. Part No. C40N31M320
Each
HK$27,616.84
Temporarily out of stock
Schneider Electric Acti9 3 Phase Distribution Board, 12 Way, 250 A
  • RS Stock No. 207-336
  • Mfr. Part No. SE36B250
Each
HK$4,911.83
In Stock
Eaton 10A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 703-8386
  • Mfr. Part No. C10G10
Each (In a Pack of 10)
HK$10.73
In Stock
Eaton 20A Rail Mount Fuse Holder for A1 Fuse, 1P, 690V ac
  • RS Stock No. 182-1581
  • Mfr. Part No. RS20FWH
Each
HK$1,314.10
In Stock
SIBA 2A M Ceramic Cartridge Fuse, 5 x 25mm
  • RS Stock No. 267-3537
  • Mfr. Part No. 70-010-05/2A
Each (In a Pack of 5)
HK$47.60
In Stock
Mersen 25A Rail Mount Fuse Holder for 8 x 31mm Fuse, 1P, 400V ac
  • RS Stock No. 189-5326
  • Mfr. Part No. V1062687 / CMC81
Each
HK$54.10
Temporarily out of stock
Hager RCBO, 40A Current Rating, 4P Poles, 30mA Trip Sensitivity, Type A
  • RS Stock No. 602-212
  • Mfr. Part No. ADX490C
Each
HK$6,792.10
In Stock
Eaton 4A T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 852-7152
  • Mfr. Part No. MDL-4-R
Each
HK$42.00
In Stock
Better World
Schneider Electric Linergy Busbar, 690V, 54mm Pitch
  • RS Stock No. 608-8236
  • Mfr. Part No. GV2G354
Each
HK$130.60
In Stock
Better World
Siemens SENTRON 5SL6 MCB, 1+N, 16A Curve C, 230V AC, 72V DC
  • RS Stock No. 213-1055
  • Mfr. Part No. 5SL6516-7
Each
HK$418.40
In Stock
Better World
ABB System Pro M Compact S200M MCB, 2P, 6A Curve C, 440V AC, 125V DC, 10 kA Breaking Capacity
  • RS Stock No. 132-015
  • Mfr. Part No. 2CDS272001R0064 S202M-C6
Each
HK$590.60
In Stock
RS PRO 2A T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 668-6079
Each (In a Pack of 10)
HK$4.41
Temporarily out of stock
RS PRO 6A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 177-8113
Each (In a Pack of 50)
HK$3.234
Temporarily out of stock
Schneider Electric RCBO, 25A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type B, Resi9 Range
  • RS Stock No. 212-022
  • Mfr. Part No. R9D01625
Each
HK$1,265.47
In Stock
Better World
Siemens RCBO, 13A Current Rating, 2P Poles, 30mA Trip Sensitivity, Type C, SENTRON Range
  • RS Stock No. 187-3288
  • Mfr. Part No. 5SV1316-7KK13
Each
HK$747.20
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