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

22 of 999+
Temporarily out of stock
Better World
Schneider Electric Acti 9 iC60H MCB, 3P, 32A Curve C, 440V AC, 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 776-2373
  • Mfr. Part No. A9F07332
Each
HK$1,115.30
In Stock
Better World
Schneider Electric Linergy Busbar, 690V, 54mm Pitch
  • RS Stock No. 608-8236
  • Mfr. Part No. GV2G354
Each
HK$130.60
In Stock
Schurter 4A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 789-7845
  • Mfr. Part No. 0034.1522
Each (In a Bag of 10)
HK$2.85
In Stock
Better World
Siemens Sentron 5SY5 MCB, 1P, 25A Curve C, 220V AC, 250V DC, 10 kA Breaking Capacity
  • RS Stock No. 196-3623
  • Mfr. Part No. 5SY5125-7
Each
HK$358.20
Temporarily out of stock
Wickmann Inline Fuse Holder
  • RS Stock No. 174-0275
  • Mfr. Part No. 01550120ZXU
Each (In a Box of 100)
HK$4.621
In Stock
Eaton 32A British Standard Fuse, A2, 550V ac, 73mm
  • RS Stock No. 413-377
  • Mfr. Part No. AAO32
Each (In a Pack of 5)
HK$83.62
In Stock
Littelfuse 1.1A Resettable Fuse, 72V
  • RS Stock No. 517-6685
  • Mfr. Part No. RXEF110
Each (In a Pack of 10)
HK$3.17
In Stock
Better World
Siemens SENTRON 5SY6 MCB, 1+N, 32A Curve C, 230V AC, 72V DC, 5 kA Breaking Capacity
  • RS Stock No. 209-6689
  • Mfr. Part No. 5SY6532-7
Each
HK$595.60
In Stock
Siemens 4A D01 Neozed Fuse, gG, 400V ac
  • RS Stock No. 622-0913
  • Mfr. Part No. 5SE2304
Each (In a Pack of 10)
HK$12.11
In Stock
Eaton 6.3A PCB Mount Fuse Holder for 5 x 20mm Fuse, 1P, 250V
  • RS Stock No. 311-0021
  • Mfr. Part No. HTC-50M
Each (In a Pack of 5)
HK$31.50
Temporarily out of stock
ABB SMISSLINE Busbar for Smissline TP
  • RS Stock No. 246-2348
  • Mfr. Part No. 2CCF800259R0001
Each
HK$220.53
In Stock
Littelfuse 3A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 787-4246
  • Mfr. Part No. 0239003.MXP
Each (In a Pack of 10)
HK$5.34
Temporarily out of stock
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
In Stock
Eaton 2A Tag Fuse, 12 x 47mm, 240V
  • RS Stock No. 228-913
  • Mfr. Part No. SSD2
1 Pack of 20
HK$1,447.30
Temporarily out of stock
ABB System Pro M Compact S200 M UC MCB, 1P, 10A Curve K, 230V AC, 220V DC, 10 kA Breaking Capacity
  • RS Stock No. 203-821
  • Mfr. Part No. 2CDS271061R0427
Each
HK$966.04
In Stock
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
In Stock
ABB 18 Way Plastic Consumer Unit, 125A, IP65 Mistral65
  • RS Stock No. 811-1896
  • Mfr. Part No. 1SL1203A00 65P18X12
Each
HK$450.30
Temporarily out of stock
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
Temporarily out of stock
Siemens 300A Centred Tag Fuse, NH2, 500V ac
  • RS Stock No. 203-2158
  • Mfr. Part No. 3NA6250
Each (In a Pack of 3)
HK$213.967
In Stock
Eaton 2A T Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 851-0801
  • Mfr. Part No. FNQ-R-2
Each
HK$547.80
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