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

124 of 999+
Eaton 2A Slow-Blow Cartridge Fuse, 10 x 38mm
  • RS Stock No. 228-664
  • Mfr. Part No. C10M2 CYLINDRICAL FUSE 10 x 38 2A AM 500V AC
1 Pack of 10
HK$126.40
Siemens SENTRON 1 Phase Busbar, 18mm Pitch
  • RS Stock No. 213-2558
  • Mfr. Part No. 5ST3632
Each (In a Pack of 10)
HK$53.03
Better World
Schneider Electric Acti 9 iC60N MCB, 3P, 63A Curve B, 440V AC, 180V DC, 6 kA Breaking Capacity
  • RS Stock No. 776-3420
  • Mfr. Part No. A9F76363
Each
HK$3,324.28
Littelfuse Fuse Holder Insulating Nut
  • RS Stock No. 342-0198
  • Mfr. Part No. 255.0808.0001
Each
HK$57.40
ABB S302 MCB, 2P, 1A Curve C, 415V AC, 125V DC, 100 kA Breaking Capacity
  • RS Stock No. 203-689
  • Mfr. Part No. 2CDS382001R0014
Each
HK$2,235.98
Eaton 1A F Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 848-3908
  • Mfr. Part No. KTK-R-1
Each
HK$379.40
ABB System Pro M Compact S200M MCB, 1P, 3A Curve D, 230/400V AC, 72V DC, 15 kA Breaking Capacity
  • RS Stock No. 202-863
  • Mfr. Part No. 2CDS271001R0031
Each
HK$931.40
Better World
Siemens, Sentron MCCB Molded Case Circuit Breaker 4P 40A, Breaking Capacity 2.5 kA
  • RS Stock No. 245-511
  • Mfr. Part No. 3VA6140-7HL41-2AA0
Each
HK$13,369.50
Phoenix Contact Electronic Device Circuit Breaker Electronic Circuit breaker 3A 24V PTCB, 1 channels , DIN Rail Mount
  • RS Stock No. 207-2805
  • Mfr. Part No. 2909909
Each
HK$378.70
Littelfuse 2A M Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 769-0026
  • Mfr. Part No. 0234002.MXP
Each (In a Pack of 25)
HK$7.02
Better World
Schneider Electric Acti 9 iC60N MCB, 3P, 16A Curve C, 400V AC, 12 → 144V DC, 6 kA Breaking Capacity
  • RS Stock No. 734-9150
  • Mfr. Part No. A9F77316
Each
HK$1,371.10
Eaton MCB, 1+N, 10A Curve C, 230V AC, 4.5 kA Breaking Capacity
  • RS Stock No. 230-1075
  • Mfr. Part No. 264744 PLG4-C10/1N
Each
HK$93.40
Legrand 100A Cartridge Fuse, 61 x 125mm, 500V
  • RS Stock No. 266-3184
  • Mfr. Part No. 0 166 45
1 Box of 3
HK$1,838.35
Schneider Electric Masterpact Control Unit for use with Masterpact NT/NW Series Circuit Breaker
  • RS Stock No. 247-1888
  • Mfr. Part No. 47280
Each
HK$30,209.10
Schneider Electric PowerPacT Rotary Handle for use with Circuit Breaker
  • RS Stock No. 654-220
  • Mfr. Part No. 9421LH6
Each
HK$863.67
Siemens 5SM26 RCCB, 63A, 2 Pole, 300mA, Type AC, 230V
  • RS Stock No. 328-417
  • Mfr. Part No. 5SM2626-0
Each
HK$1,246.29
Eaton 160A Solid Link for NH Fuses
  • RS Stock No. 255-347
  • Mfr. Part No. 263114 Z-NH-00/TR
1 Pack of 3
HK$366.90
Schneider Electric, ComPacT MCCB 4P 40A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 341-511
  • Mfr. Part No. C10N6TM040
Each
HK$10,564.48
Eaton 15A 0.001 x 0.001in Open Fuse Fuse Block, 600V
  • RS Stock No. 228-654
  • Mfr. Part No. BG3012B
1 Pack of 8
HK$14,594.20
Schneider Electric Acti9 A9F MCB, 3P, 40A Curve B, 400V AC, 180V DC, 15 kA Breaking Capacity
  • RS Stock No. 288-7091
  • Mfr. Part No. A9F93340
Each
HK$5,106.49
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