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

47290 Products showing for Fuses & Circuit Breakers

8 of 999+
Better World
Schneider Electric Acti 9 3 Phase Busbar, 415V ac, 18mm Pitch
  • RS Stock No. 776-2764
  • Mfr. Part No. A9XAH357
Each
HK$965.60(exc. GST)
Better World
Schneider Electric Acti 9 C60-PV MCB, 2P, 16A Curve B, 800V DC, 3 kA Breaking Capacity
  • RS Stock No. 776-3629
  • Mfr. Part No. A9N61651
Each
HK$2,304.30(exc. GST)
Better World
Schneider Electric iID RCCB, 25A, 2 Pole, 300mA
  • RS Stock No. 734-9337
  • Mfr. Part No. A9R14225
Each
HK$1,712.52(exc. GST)
Better World
Schneider Electric Multi 9 C60SP MCB, 1P, 6A Curve B, 415V AC, 60V DC, 20 kA Breaking Capacity
  • RS Stock No. 211-2330
  • Mfr. Part No. M9F21106
Each
HK$171.80(exc. GST)
Eaton 63A Tag Fuse, 22 x 86mm, 690V, 73mm
  • RS Stock No. 260-696
  • Mfr. Part No. TIS63
1 Pack of 20
HK$4,615.60(exc. GST)
Eaton 10A Tag Fuse, 550V ac
  • RS Stock No. 228-808
  • Mfr. Part No. NITD10 10A 550V AC BS88 FUSE
1 Pack of 20
HK$1,608.70(exc. GST)
Better World
Siemens SENTRON 5SL4 MCB, 1+N, 1A Curve B, 230V AC, 72V DC
  • RS Stock No. 209-7478
  • Mfr. Part No. 5SL4501-6
Each
HK$535.60(exc. GST)
ABB, SACE Tmax XT MCCB Molded Case Circuit Breaker 3P 400A, Breaking Capacity 70 kA, Fixed Mount
  • RS Stock No. 231-9327
  • Mfr. Part No. 1SDA100345R1 XT5N 400 TMA 400-4000 3pFF
Each
HK$9,516.80(exc. GST)
Siemens RCBO, 40A Current Rating, 4P Poles, 300mA Trip Sensitivity, Type AC, Sentron Range
  • RS Stock No. 196-3604
  • Mfr. Part No. 5SM26420
Each
HK$610.00(exc. GST)
Eaton 100A Rail Mount Fuse Holder for A4 Fuse, 1P, 690V ac
  • RS Stock No. 182-1723
  • Mfr. Part No. RS100HWH
Each
HK$976.30(exc. GST)
Better World
Siemens Sentron 5SY6 MCB, 1P, 500mA Curve C, 230V AC, 6 kA Breaking Capacity
  • RS Stock No. 521-4989
  • Mfr. Part No. 5SY6105-7
Each
HK$185.50(exc. GST)
RS PRO 16A Rail Mount Fuse Holder, 600V ac
  • RS Stock No. 501-809
Each (In a Pack of 10)
HK$59.85(exc. GST)
Eaton 6A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 703-8374
  • Mfr. Part No. C10G6
Each (In a Pack of 10)
HK$19.53(exc. GST)
Better World
Schneider Electric RCBO, 16A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type C, Acti 9 Range
  • RS Stock No. 790-9291
  • Mfr. Part No. A9D19816
Each
HK$1,518.90(exc. GST)
Schneider Electric Multi 9 C68N MCB, 2P, 16A, 415V AC, 6 kA Breaking Capacity
  • RS Stock No. 729-9052
  • Mfr. Part No. C68N 2P 16A (HK)
Each
HK$206.08(exc. GST)
Siemens 125A NH Fuse, NH0, 500V ac
  • RS Stock No. 397-442
  • Mfr. Part No. 3NA3032
Each (In a Pack of 3)
HK$143.533(exc. GST)
RS PRO 1A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-380
Each (In a Pack of 10)
HK$3.26(exc. GST)
Better World
Siemens SENTRON MCB, 1P, 16A Curve C, 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 189-3191
  • Mfr. Part No. 5SL6116-7
Each
HK$100.90(exc. GST)
Better World
Schneider Electric Easy 9 EZ9 MCB, 1P, 20A Curve C, 230V AC, 6 kA Breaking Capacity
  • RS Stock No. 850-8631
  • Mfr. Part No. EZ9F66120
Each
HK$22.60(exc. GST)
RS PRO 5A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 668-6045
Each (In a Pack of 10)
HK$3.283(exc. GST)
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