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

2323 of 999+
Temporarily out of stock
Hinode Electric Co Ltd 250A Bolted Tag Fuse, 82mm
  • RS Stock No. 103-4254
  • Mfr. Part No. 660GH-250
Each
HK$576.17
In Stock
Eaton xEffect MCB, 2P, 2A Curve B
  • RS Stock No. 230-0889
  • Mfr. Part No. 177543 FAZ6-B2/2
Each
HK$664.00
Temporarily out of stock
Schneider Electric RCBO, 25A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type B, Acti9 Range
  • RS Stock No. 654-687
  • Mfr. Part No. A9DH3625
Each
HK$2,944.70
Temporarily out of stock
3.15A Cartridge Fuses
  • RS Stock No. 262-743
  • Mfr. Part No. 36ODGNA3.15
1 Pack of 3
HK$24,722.30
Temporarily out of stock
Better World
Siemens SENTRON 5SL4 MCB, 3P, 1A Curve B, 400V AC, 72V DC
  • RS Stock No. 210-3362
  • Mfr. Part No. 5SL4301-6
Each
HK$830.00
Temporarily out of stock
Schneider Electric Cross Elbow Busbar Trunking, 200 → 1200mm, 400A, Canalis Series
  • RS Stock No. 335-024
  • Mfr. Part No. KSA400DZCG43F
Each
HK$28,666.70
In Stock
Eaton 32A Bolted Tag Fuse, F2, 550V ac
  • RS Stock No. 181-8639
  • Mfr. Part No. ESD32
Each
HK$328.80
In Stock
Eaton 2A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 848-3024
  • Mfr. Part No. BK-GMA-2-R
Each
HK$4.60
Temporarily out of stock
Better World
Siemens SENTRON 5SY6 MCB, 4P, 40A Curve C, 400V AC, 72V DC, 6 kA Breaking Capacity
  • RS Stock No. 209-6027
  • Mfr. Part No. 5SY6440-7
Each
HK$2,068.00
Temporarily out of stock
Better World
Schneider Electric TeSys Clip-on Connector for use with GV7 Motor Circuit Breakers
  • RS Stock No. 212-0188
  • Mfr. Part No. GV7AC022
Each
HK$537.80
Temporarily out of stock
ABB RCBO, 63A Current Rating, 2P Poles, Type C
  • RS Stock No. 237-5149
  • Mfr. Part No. 2CSR272101R1634
Each
HK$3,002.83
In Stock
Eaton 500mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 848-3034
  • Mfr. Part No. GMA-500-R
Each
HK$7.10
Temporarily out of stock
Phoenix Contact Thermal Circuit Breaker - CB TM2 2 Pole 80V dc Voltage Rating, 2A Current Rating
  • RS Stock No. 217-6379
  • Mfr. Part No. 2800892
Each
HK$745.60
In Stock
Better World
Schneider Electric Acti 9 Acti9 iDT40N MCB, 3P, 40A Curve D, 400V AC
  • RS Stock No. 239-9973
  • Mfr. Part No. A9P34340
Each
HK$2,227.90
In Stock
Contactum MCB, 3P, 20A Curve C, 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 184-9038
  • Mfr. Part No. CPB1020C3
Each
HK$140.30
In Stock
Littelfuse 100A Yellow Bolt Down Car Fuse, 32V dc
  • RS Stock No. 787-4397P
  • Mfr. Part No. 0298100.ZXEH
Each (Supplied in a Bag)
HK$43.50
In Stock
Contactum RCBO, 32A Current Rating, 1P Poles, 30mA Trip Sensitivity, Type B, CCPBR Range
  • RS Stock No. 240-6388
  • Mfr. Part No. CCPBR0632AB
Each
HK$212.00
Temporarily out of stock
Eaton MCB, 3P, 13A Curve D, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 244-013
  • Mfr. Part No. 101327 PLI-D13/3
Each
HK$1,199.79
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1kA 1SDA07, 4 channels
  • RS Stock No. 259-4537
  • Mfr. Part No. 1SDA072773R1
Each
HK$47,260.31
Temporarily out of stock
Eaton IZMX/INX Phase Barrier for use with INX16…, IZMX16…
  • RS Stock No. 132-604
  • Mfr. Part No. 184131 IZMX-IB163-1
Each
HK$557.57
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