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

45 of 999+
Hager BDH RCD, 125A, 3 Pole, 30mA, Type A-HI, 500V
  • RS Stock No. 599-886
  • Mfr. Part No. BDH380E
Each
HK$9,718.10
Eaton 100mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 848-2996
  • Mfr. Part No. GMA-100-R
Each
HK$40.60
Eaton 63A British Standard Fuse, A4, 500V ac, 94mm
  • RS Stock No. 415-323
  • Mfr. Part No. CEO63
Each
HK$99.70
Bulgin PVC Fuse Cover
  • RS Stock No. 408-432
  • Mfr. Part No. 9820
Each (In a Pack of 5)
HK$6.36
Littelfuse 30A Inline Fuse Holder for ATO Fuse, 32V dc
  • RS Stock No. 419-195
  • Mfr. Part No. 0FHA0002ZXJ
Each (In a Pack of 5)
HK$37.24
Siemens SENTRON Mounting Kit for use with 3VA9603
  • RS Stock No. 269-7231
  • Mfr. Part No. 3VA9603-0SS10
Each (In a Pack of 4)
HK$109.10
ABB Emax2 Electronic Circuit Breaker 1kA Ekip Dip LSI, 4 channels
  • RS Stock No. 259-4639
  • Mfr. Part No. 1SDA072912R1
Each
HK$71,070.49
ABB Emax2 Electronic Circuit Breaker 1kA Ekip G Hi-Touch LSIG, 4 channels
  • RS Stock No. 259-3604
  • Mfr. Part No. 1SDA071580R1
Each
HK$117,470.23
Littelfuse 2A Grey Blade Car Fuse, 32V dc
  • RS Stock No. 787-4126
  • Mfr. Part No. 0287002.PXCN
Each (In a Pack of 10)
HK$2.44
Better World
Schneider Electric Acti 9 iC60N MCB, 1P, 40A Curve C, 100 → 133V AC, 12 → 48V DC, 6 kA Breaking Capacity
  • RS Stock No. 790-8872
  • Mfr. Part No. A9F44140
Each
HK$171.50
Better World
Schneider Electric Auto Recloser Circuit Trip for use with Circuit Breaker
  • RS Stock No. 790-7359
  • Mfr. Part No. A9C70134
Each
HK$3,352.10
Better World
Siemens RCBO, 25A Current Rating, 2P Poles, 30mA Trip Sensitivity, Type AC, Sentron Range
  • RS Stock No. 196-3616
  • Mfr. Part No. 5SV43120KL
Each
HK$818.90
ETA Thermal Circuit Breaker - 3600 Single Pole 250V Voltage Rating Panel Mount, 10A Current Rating
  • RS Stock No. 729-2855
  • Mfr. Part No. 3600-P10-Si-10A
Each
HK$879.40
Better World
ABB System Pro M Compact S200 MCB, 3P, 2A Curve K, 440V AC, 20 kA Breaking Capacity
  • RS Stock No. 514-0181
  • Mfr. Part No. 2CDS253001R0277 S203-K2
Each
HK$972.40
Eaton xEffect MCB, 2P, 63A Curve C, 230 → 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 769-4728
  • Mfr. Part No. 239109 FAZ6-C63/2
Each
HK$598.10
Siemens SENTRON Assembly Kit for use with 3VA1 100/160
  • RS Stock No. 210-3512
  • Mfr. Part No. 3VA9113-0QA00
Each
HK$166.30
Phoenix Contact Thermal Circuit Breaker - TCP 6A Single Pole 65 V dc, 250V ac Voltage Rating, 6A Current Rating
  • RS Stock No. 801-6918
  • Mfr. Part No. 0712275
Each
HK$128.00
Phoenix Contact Thermal Circuit Breaker - TCP 10A Single Pole 65 V dc, 250V ac Voltage Rating, 10A Current Rating
  • RS Stock No. 801-6915
  • Mfr. Part No. 0712314
Each
HK$128.00
Better World
ABB System Pro M Compact S200M MCB, 1P, 500mA Curve C, 253V AC, 72V DC, 25 kA Breaking Capacity
  • RS Stock No. 231-9698
  • Mfr. Part No. 2CDS271001R0984 S201M C 0.5A - 15 KA
1 Box of 1
HK$199.50
Eaton 20A Yellow Automotive Car Fuse, 32V dc No
  • RS Stock No. 848-2567
  • Mfr. Part No. ATC-20
Each
HK$9.20
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