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

2245 of 999+
Contactum MCB, 3P, 32A Curve D, 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 184-9045
  • Mfr. Part No. CPB1032D3
Each
HK$133.00
ABB RCBO, 20A Current Rating, 2P Poles, 30mA Trip Sensitivity, Type C, System Pro M Compact Range
  • RS Stock No. 201-6957
  • Mfr. Part No. 2CSR255180R1204 DS201 C20 A30
Each
HK$1,846.60
ABB Emax2 Electronic Circuit Breaker 800A Ekip Touch LI, 4 channels
  • RS Stock No. 259-4502
  • Mfr. Part No. 1SDA072724R1
Each
HK$36,159.83
ABB S802C MCB, 2P, 32A Curve D, 415V AC, 25 kA Breaking Capacity
  • RS Stock No. 140-459
  • Mfr. Part No. 2CCS882001R0321
Each
HK$2,251.20
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 100A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 269-889
  • Mfr. Part No. 3VA6110-6HL31-0AA0
Each
HK$7,575.40
Schneider Electric, ComPacT MCCB 3P 630A, Breaking Capacity 50 kA, Fixed Mount
  • RS Stock No. 654-971
  • Mfr. Part No. C063N320FM
Each
HK$38,944.40
SENTRON Wire Connector for use with 3VA55, 3VA65/3VA66 Series
  • RS Stock No. 263-909
  • Mfr. Part No. 3VA9674-0JJ44
1 Kit
HK$6,634.20
Phoenix Contact 1 Phase Surge Arrester, DIN Rail Mount
  • RS Stock No. 129-569
  • Mfr. Part No. 2858632
Each
HK$3,289.31
Schneider Electric VigiPacT Wiring Kit for use with VigiPacT RHB Residual Current Protection Relay
  • RS Stock No. 654-643
  • Mfr. Part No. LV481018
Each
HK$5,091.81
Eaton 10A British Standard Fuse, A1, 550V ac, 44.5mm
  • RS Stock No. 413-298
  • Mfr. Part No. NITD10
Each (In a Pack of 5)
HK$160.58
ABB Emax2 Electronic Circuit Breaker 250A 1SDA07, 4 channels
  • RS Stock No. 259-3395
  • Mfr. Part No. 1SDA071329R1
Each
HK$98,388.50
Better World
Siemens SENTRON 5SL4 MCB, 1+N, 3A Curve C, 230V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 209-5984
  • Mfr. Part No. 5SL4503-7
Each
HK$571.20
Siemens 500A Slotted Tag Fuse, NH3, 400V
  • RS Stock No. 230-2974
  • Mfr. Part No. 3NC3434-1U
Each (In a Pack of 3)
HK$3,950.60
Eaton 6A F Glass Cartridge Fuse, 6.3 x 20mm
  • RS Stock No. 849-5835
  • Mfr. Part No. AGW-6
Each (In a Pack of 5)
HK$25.46
Socomec 50A F Cartridge Fuse, 14 x 51mm
  • RS Stock No. 223-2836
  • Mfr. Part No. 60530050
Each (In a Pack of 10)
HK$85.888
Siemens 63A Centred Tag Fuse, NH00, 690V ac
  • RS Stock No. 203-2132
  • Mfr. Part No. 3NA6822-6
Each (In a Pack of 3)
HK$326.30
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 160A, Breaking Capacity 36 kA, DIN Rail Mount
  • RS Stock No. 271-9777
  • Mfr. Part No. 3VA1116-4GD46-0AA0
Each
HK$9,835.40
Hinode Electric Co Ltd 30A Cartridge Fuse, 11 x 38mm
  • RS Stock No. 103-4262
  • Mfr. Part No. 660KHK30
Each (In a Pack of 5)
HK$99.412
RS PRO 100A Slotted Tag Fuse, 17.4 x 42mm, 240V, 42mm
  • RS Stock No. 188-4654
Each
HK$281.46
Eaton MCB, 1+N, 6A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 243-993
  • Mfr. Part No. 101275 PLI-C6/1N
Each
HK$656.63
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