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

105 of 999+
Temporarily out of stock
160A Tag Fuse, 110 x 210mm, 690V
  • RS Stock No. 262-626
  • Mfr. Part No. EBH0013TBM8 SIZE 00 HOR FSD BTM
Each
HK$975.40
Temporarily out of stock
160A Tag Fuse, 40 x 192mm, 0.66/1.5kV
  • RS Stock No. 262-600
  • Mfr. Part No. TFC160
Each
HK$2,966.70
In Stock
Rittal Polycarbonate Mounting Frame for Use with Interfaces And Sockets
  • RS Stock No. 230-4882
  • Mfr. Part No. 2482600
Each
HK$1,406.00
Temporarily out of stock
Eaton 250A Tag Fuse, 185 x 270mm, 690V
  • RS Stock No. 263-174
  • Mfr. Part No. EBH1O3TMV
Each
HK$1,998.40
In Stock
ABB S201L MCB, 1P, 32A Curve C, 230/400V AC, 6 kA Breaking Capacity
  • RS Stock No. 203-771
  • Mfr. Part No. 2CDS241701R0324
Each
HK$377.36
In Stock
ABB S302 MCB, 2P, 10A Curve C, 415V AC, 125V DC, 25 kA Breaking Capacity
  • RS Stock No. 200-745
  • Mfr. Part No. 2CDS382001R0104
Each
HK$1,712.66
Temporarily out of stock
6.3A Cartridge Fuse, 51 x 537mm
  • RS Stock No. 262-746
  • Mfr. Part No. 36TDQSJ6.3
Each
HK$2,688.50
Temporarily out of stock
ABB System Pro M Compact S200L MCB, 1P, 20A Curve C, 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 183-3627
  • Mfr. Part No. 2CDS241701R0204
Each
HK$223.14
In Stock
Better World
Schneider Electric Multi 9 C60SP MCB, 1P, 16A Curve D, 415V AC, 60V DC, 20 kA Breaking Capacity
  • RS Stock No. 211-2389
  • Mfr. Part No. M9F23116
Each
HK$148.20
Temporarily out of stock
Better World
Schneider Electric Acti 9 A9F9 MCB, 3P, 1A Curve K, 400V AC, 180V DC, 20 kA, 15 kA Breaking Capacity
  • RS Stock No. 211-2508
  • Mfr. Part No. A9F95301
Each
HK$4,386.69
In Stock
Sato Parts 10A Panel Mount Fuse Holder for 6.35 x 30mm Fuse, 250V ac
  • RS Stock No. 523-4898
  • Mfr. Part No. F-120-B
Each
HK$22.50
Temporarily out of stock
Schneider Electric, PowerPact MCCB 3P 225A, Breaking Capacity 18 kA, DIN Rail Mount
  • RS Stock No. 428-703
  • Mfr. Part No. NJGL36225
Each
HK$35,443.20
Temporarily out of stock
Eaton 160A NH Fuse, 63 x 40 x 135mm, 690V ac
  • RS Stock No. 240-196
  • Mfr. Part No. 160NHG1B-690 NH FUSE 160A 690V GG SIZE 1
1 Pack of 3
HK$373.80
Temporarily out of stock
200A NH Fuse, 63 x 40 x 135mm, 690V ac
  • RS Stock No. 252-963
  • Mfr. Part No. 200NHG1B-690 NH FUSE 200A 690V gG SIZE 1
1 Pack of 3
HK$373.80
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
Schurter TA11 Thermal Circuit Breaker - T11-211 Single Pole 240V ac Voltage Rating Universal Mount, 6A Current Rating
  • RS Stock No. 269-3820
  • Mfr. Part No. 4400.0050
Each
HK$71.20
In Stock
RS PRO 500mA FF Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 721-1563
Each (In a Pack of 10)
HK$16.60
Temporarily out of stock
Better World
Schneider Electric TeSys Thermal Circuit Breaker - TeSyS GV 3 Pole 690V ac Voltage Rating, 115A Current Rating
  • RS Stock No. 175-1533
  • Mfr. Part No. GV4PE115S6
Each
HK$8,081.79
Temporarily out of stock
Hager Electronic Circuit Breaker 16A NKN, 2 channels
  • RS Stock No. 251-2080
  • Mfr. Part No. NKN216
Each
HK$1,410.32
In Stock
ABB High Performance S800N MCB, 2P, 80A Curve C, 400V AC, 36 kA Breaking Capacity
  • RS Stock No. 435-544
  • Mfr. Part No. 2CCG001229R0001
Each
HK$1,771.30
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