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

119 of 999+
ABB S403M MCB, 3P, 63A Curve C, 440V AC, 12V DC, 15 kA Breaking Capacity
  • RS Stock No. 140-514
  • Mfr. Part No. 2CCS573001R0634
Each
HK$5,365.30
Wickmann 60A Inline Fuse Holder, 58V dc
  • RS Stock No. 174-0617
  • Mfr. Part No. FHJC1002G
1 Pack of 1
HK$101.30
Better World
Siemens, SENTRON MCCB 3P 20A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 874-4222
  • Mfr. Part No. 3VA1120-3ED36-0AA0
Each
HK$2,081.20
Eaton 670A Tag Fuse, 83 x 210mm, 0.35/0.66kV, 133/184mm
  • RS Stock No. 260-699
  • Mfr. Part No. TLM670
Each
HK$3,316.90
ABB System Pro M Compact S200 M UC MCB, 1P, 5A Curve K, 230V AC, 220V DC, 10 kA Breaking Capacity
  • RS Stock No. 203-819
  • Mfr. Part No. 2CDS271061R0357
Each
HK$1,187.45
Better World
Siemens, 3VA1 MCCB 3P 96A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 210-3329
  • Mfr. Part No. 3VA1120-5ED32-0AA0
Each
HK$2,044.80
Eaton 20A British Standard Fuse, A2, 550V ac, 73mm
  • RS Stock No. 413-355
  • Mfr. Part No. AAO20
Each (In a Pack of 5)
HK$97.68
Schneider Electric Resi9 Two Phase Distribution Board, 90 A
  • RS Stock No. 276-8960
  • Mfr. Part No. R9H18403
Each
HK$1,034.56
Schneider Electric A9Z RCCB, 40A, 4 Pole, 30mA, Type A-SI, 380-415V ac
  • RS Stock No. 212-257
  • Mfr. Part No. A9Z31440
Each
HK$2,150.34
ABB S801N MCB, 1P, 16A Curve B, 400V AC, 36 kA Breaking Capacity
  • RS Stock No. 140-845
  • Mfr. Part No. 2CCS891001R0165
Each
HK$1,438.83
Schneider Electric ComPacT Trip Unit for use with ComPacT NSX100
  • RS Stock No. 655-282
  • Mfr. Part No. C104MG080
Each
HK$2,658.45
Schneider Electric PowerPact H Lug Connector for use with Short lug
  • RS Stock No. 358-467
  • Mfr. Part No. S37447
Each
HK$1,909.25
Schneider Electric MasterPact Protection Module for use with Masterpact MasterPact MTZ1
  • RS Stock No. 654-886
  • Mfr. Part No. LV833767SP
Each
HK$1,800.40
Better World
Siemens SENTRON 5SL4 MCB, 3+N, 1A Curve C, 400V AC, 72V DC
  • RS Stock No. 209-7465
  • Mfr. Part No. 5SL4401-7
Each
HK$1,458.50
Bourns 200A Tag Fuse, 66mm, 500/600V ac, 24.1mm
  • RS Stock No. 254-4157
  • Mfr. Part No. PF-FB2-50
Each
HK$523.10
Schneider Electric, ComPacT MCCB 4P 1.6kA, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 345-342
  • Mfr. Part No. C16BN4FM
Each
HK$151,881.08
Phoenix Contact Electronic Device Circuit Breaker Electronic Circuit breaker 4A 24V CB, 1 channels
  • RS Stock No. 212-8802
  • Mfr. Part No. 2800911
Each
HK$380.10
Better World
Siemens, SENTRON MCCB 3P 50A, Breaking Capacity 55 kA
  • RS Stock No. 209-7000
  • Mfr. Part No. 3VA1150-5ED32-0AA0
Each
HK$2,044.80
Phoenix Contact Electronic Device Circuit Breaker Electronic Circuit breaker 6A 24V CB, 1 channels
  • RS Stock No. 212-8803
  • Mfr. Part No. 2800912
Each
HK$420.10
Better World
Siemens SIRIUS Electronic Circuit Breaker 200mA 3RV2, 3 channels , DIN Rail Mount
  • RS Stock No. 160-103
  • Mfr. Part No. 3RV2411-0BA10
Each
HK$602.10
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