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

47266 Products showing for Fuses & Circuit Breakers

21 of 999+
Legrand Bell Transformer for use with Bell
  • RS Stock No. 266-1381
  • Mfr. Part No. 413091
Each
HK$1,785.77
Schneider Electric Acti 9 MCB, 3P, 32A Curve C, 230V AC, 7.5 kA Breaking Capacity
  • RS Stock No. 200-6159
  • Mfr. Part No. A9PA2732
Each
HK$1,595.90
Phoenix Contact 2A Cartridge Fuse, 10 x 38mm
  • RS Stock No. 254-4864
  • Mfr. Part No. 3061295
Each (In a Pack of 10)
HK$98.95
Littelfuse 50A Blade Fuse Car Fuse, 32V ac/dc
  • RS Stock No. 878-3249
  • Mfr. Part No. 0MID050.X
Each
HK$51.60
RS PRO SMD Non Resettable Fuse 30A, 125V
  • RS Stock No. 182-4060
Each (In a Pack of 5)
HK$12.16
Eaton 25A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 852-7421
  • Mfr. Part No. ABC-25-R
Each
HK$22.10
ABB 18 Way Plastic Consumer Unit, 125A, IP65 Mistral65
  • RS Stock No. 811-1896
  • Mfr. Part No. 1SL1203A00 65P18X12
Each
HK$450.30
Better World
Schneider Electric Acti 9 C60H-DC MCB, 2P, 20A Curve C, 500V DC, 20 kA Breaking Capacity
  • RS Stock No. 776-3212
  • Mfr. Part No. A9N61532
Each
HK$1,279.60
Siemens SENTRON 5SJ4108 MCB, 1P, 8A Curve D, 400V AC, 60V DC, 14 kA Breaking Capacity
  • RS Stock No. 299-722
  • Mfr. Part No. 5SJ4108-8HG41
Each
HK$604.80
Schneider Electric EasyPact Electronic Circuit Breaker 63A, Plug In
  • RS Stock No. 122-460
  • Mfr. Part No. LV510335P
Each
HK$1,266.04
Better World
ABB Emax2 Electronic Circuit Breaker 630A Ekip Touch LSIG, 3 channels
  • RS Stock No. 259-9893
  • Mfr. Part No. 1SDA070726R1
Each
HK$52,137.62
Schneider Electric Opale 1 Phase Distribution Board, 4 Way, 63 A
  • RS Stock No. 301-8593
  • Mfr. Part No. 13394
Each
HK$84.90
Better World
Siemens, SENTRON Circuit breaker 4P 250A, DIN Rail Mount
  • RS Stock No. 224-7906
  • Mfr. Part No. 3VA1225-5GF42-0AA0
Each
HK$12,535.60
Wickmann 10A Red Blade Car Fuse, 58V dc
  • RS Stock No. 174-0759
  • Mfr. Part No. 0997010.WXN
Each (In a Pack of 10)
HK$4.86
Siemens ALPHA Kit for use with ALPHA 160/400
  • RS Stock No. 216-5989
  • Mfr. Part No. 8GK4851-5KK00
Each
HK$450.30
ABB Emax2 Electronic Circuit Breaker 2kA 1SDA07, 4 channels
  • RS Stock No. 259-3691
  • Mfr. Part No. 1SDA071665R1
Each
HK$90,675.97
Siemens 6A Centred Tag Fuse, NH000, 690V
  • RS Stock No. 210-6899
  • Mfr. Part No. 3NA3801-6
Each (In a Pack of 3)
HK$262.467
Better World
Siemens, SENTRON Circuit breaker 3P 400A, DIN Rail Mount
  • RS Stock No. 224-7909
  • Mfr. Part No. 3VA1440-6MH32-0AA0
Each
HK$14,506.70
Siemens 200A NH Fuse, NH2, 500V ac
  • RS Stock No. 395-547
  • Mfr. Part No. 3NA3240
Each (In a Pack of 3)
HK$133.567
Better World
Schneider Electric iID RCCB, 63A, 4 Pole, 300mA, Type B-SI, 400V ac
  • RS Stock No. 248-3725
  • Mfr. Part No. A9Z64463
Each
HK$12,009.80
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