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

150 of 999+
In Stock
Mersen 10A Slow-Blow Ceramic Cartridge Fuse, 14 x 51mm
  • RS Stock No. 247-2886
  • Mfr. Part No. S200760
1 Box of 10
HK$786.77
Temporarily out of stock
SENTRON Terminal Cover for use with 3VA53/54, 3VA63/64 Series
  • RS Stock No. 263-533
  • Mfr. Part No. 3VA9471-0WD31
Each
HK$423.20
Temporarily out of stock
Siemens, SENTRON MCCB 3P 400A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 257-399
  • Mfr. Part No. 3VA5340-7EC31-0AA0
Each
HK$21,546.00
Temporarily out of stock
Eaton 4A Bolt Fixing Photovoltaic Fuse, 10 x 38mm, 1000V dc, 49.7mm
  • RS Stock No. 703-8254
  • Mfr. Part No. PV-4A10-T
Each
HK$468.40
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 50A, Breaking Capacity 25 kA
  • RS Stock No. 209-6828
  • Mfr. Part No. 3VA1150-3EE46-0AA0
Each
HK$4,296.40
Temporarily out of stock
Better World
Schneider Electric Busbar Tap-Off Unit with Circuit Breaker
  • RS Stock No. 219-8944
  • Mfr. Part No. KSB250DC4
Each
HK$16,097.03
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 3P, 20A Curve C, 440V AC, 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 776-2360
  • Mfr. Part No. A9F07320
Each
HK$465.40
In Stock
Schneider Electric A9Z RCCB, 40A, 4 Pole, 300mA, Type A-SI, 380-415V ac
  • RS Stock No. 212-258
  • Mfr. Part No. A9Z35440
Each
HK$2,255.01
In Stock
Littelfuse Non-Resettable Surface Mount Fuse 60A, 250V ac
  • RS Stock No. 229-1426P
  • Mfr. Part No. 0456060.DRSDE
Each (Supplied on a Reel)
HK$51.70
Temporarily out of stock
Phoenix Contact 25A Cartridge Fuse, 10 x 38mm
  • RS Stock No. 270-2609
  • Mfr. Part No. 3061364
Each (In a Pack of 10)
HK$96.78
In Stock
Eaton 80A British Standard Fuse, A3, 500V ac, 73.5mm
  • RS Stock No. 418-978
  • Mfr. Part No. OSD80
Each
HK$135.70
Temporarily out of stock
Socomec Fuse Holder Comb Bridge Nozzle
  • RS Stock No. 252-3744
  • Mfr. Part No. 17498001
Each
HK$7.19
In Stock
Safety fuse insert, 25 A, 10 x 38 mm
  • RS Stock No. 286-0188
  • Mfr. Part No. 2827990000
Each (In a Pack of 10)
HK$64.865
Temporarily out of stock
Hager 125A Cartridge Fuse, 22.2 x 58mm
  • RS Stock No. 250-8658
  • Mfr. Part No. LF599G
Each (In a Pack of 10)
HK$143.681
Temporarily out of stock
Hager CDF RCD Switch, 40A, 2 Pole, 30mA, Type F, 127 → 230V
  • RS Stock No. 599-838
  • Mfr. Part No. CDF747F
Each
HK$1,492.60
Temporarily out of stock
WAGO Electronic Circuit Breaker 10A 48V 787, 8 channels , DIN Rail
  • RS Stock No. 279-4112
  • Mfr. Part No. 787-1668/000-250
Each
HK$3,182.00
Temporarily out of stock
Schneider Electric M9R RCCB, 25A, 2 Pole, 86mA, Type A-SI, 240V ac
  • RS Stock No. 212-015
  • Mfr. Part No. M9R12225
Each
HK$1,688.20
Temporarily out of stock
Schneider Electric Acti9 3 Phase Distribution Board, 63 A
  • RS Stock No. 339-815
  • Mfr. Part No. SEA9BN3155
Each
HK$10,640.90
Temporarily out of stock
Siemens, SENTRON MCCB 3P 200A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 257-356
  • Mfr. Part No. 3VA5320-6EC31-0AA0
Each
HK$11,629.10
Temporarily out of stock
Siemens, SENTRON MCCB 3P 250A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 257-306
  • Mfr. Part No. 3VA5325-6EC31-2AA0
Each
HK$12,866.20
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