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

134 of 999+
In Stock
Bourns 0.75A Resettable Fuse, 30V
  • RS Stock No. 245-9181
  • Mfr. Part No. MF-MSHT075KX-2
Each (On a Tape of 10)
HK$4.55
In Stock
Schurter PC Board Non Resettable Fuse, Radial 2A, 250V ac
  • RS Stock No. 173-9803
  • Mfr. Part No. 0034.6618
Each (In a Bag of 100)
HK$2.092
In Stock
RS PRO 1A FF Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 209-9355
Each (In a Pack of 10)
HK$14.06
Temporarily out of stock
Siemens SENTRON Connection Unit for use with Circuit Breaker 3WL10 / 3VA27
  • RS Stock No. 266-699
  • Mfr. Part No. 3VW9011-0AN33
1 Kit
HK$2,084.30
Temporarily out of stock
Schneider Electric Flexible Element, 500mm, 40A, Canalis Series
  • RS Stock No. 207-164
  • Mfr. Part No. KBA40DF405TW
Each
HK$2,137.33
In Stock
Littelfuse 1.1A Resettable Fuse, 6V dc
  • RS Stock No. 517-7262P
  • Mfr. Part No. MICROSMD110F-2
Each (Supplied on a Reel)
HK$2.465
Temporarily out of stock
Schneider Electric Flexible Element, 500mm, 40A, KBB Series
  • RS Stock No. 655-015
  • Mfr. Part No. KBB40DF4405TW
Each
HK$5,162.93
Temporarily out of stock
Schneider Electric RCBO, 45A Current Rating, 1P Poles, Type C, Acti9 Range
  • RS Stock No. 207-397
  • Mfr. Part No. A9D06845
Each
HK$1,991.70
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 600A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 250-024
  • Mfr. Part No. 3VA6560-7HN32-2AA0
Each
HK$39,425.70
In Stock
Littelfuse 20A Inline Fuse Holder for 6.3 x 32mm Fuse, 32V dc
  • RS Stock No. 360-7294
  • Mfr. Part No. 01550100Z
Each (In a Pack of 5)
HK$21.00
Temporarily out of stock
Eaton MCB Blanking Module for use with SPN, TPN, Type A Distribution Boards, Type B Distribution Boards
  • RS Stock No. 124-3030
  • Mfr. Part No. EMBP EMBP
Each
HK$21.60
In Stock
Better World
Schneider Electric Acti 9 iC60N MCB, 2P, 40A Curve C, 440V AC, 125V DC, 6 kA Breaking Capacity
  • RS Stock No. 776-3474
  • Mfr. Part No. A9F77240
Each
HK$980.17
In Stock
Eaton 80A British Standard Fuse, FE, 660V ac, 63.5mm
  • RS Stock No. 156-8995
  • Mfr. Part No. 80FE
Each
HK$274.30
In Stock
Eaton 63A British Standard Fuse, LET, 150 V dc, 240V ac, 41.8mm
  • RS Stock No. 156-8838
  • Mfr. Part No. 63LET
Each
HK$81.20
In Stock
Siemens SENTRON Busbar
  • RS Stock No. 213-2589
  • Mfr. Part No. 5ST3803
Each
HK$409.20
Temporarily out of stock
Siemens, SENTRON MCCB 4P 200A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 147-293
  • Mfr. Part No. 3VA5220-6GC41-0AA0
Each
HK$11,752.80
Temporarily out of stock
Siemens, SENTRON MCCB 4P 300A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 257-429
  • Mfr. Part No. 3VA5330-6EF41-2AA0
Each
HK$20,598.30
Temporarily out of stock
Better World
Siemens, Sentron MCCB Molded Case Circuit Breaker 4P 40A, Breaking Capacity 2.5 kA
  • RS Stock No. 245-612
  • Mfr. Part No. 3VA6140-6JP41-2AA0
Each
HK$13,608.50
Temporarily out of stock
Siemens, SENTRON MCCB 4P 400A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 257-396
  • Mfr. Part No. 3VA5340-6EC41-0AA0
Each
HK$17,691.00
Temporarily out of stock
Siemens, SENTRON MCCB 3P 90A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 147-725
  • Mfr. Part No. 3VA5190-5EC31-1AA0
Each
HK$2,579.40
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