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

2271 of 999+
Temporarily out of stock
Siemens, SENTRON MCCB 3P 225A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 147-333
  • Mfr. Part No. 3VA5222-7EC31-1AA0
Each
HK$18,443.70
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 1kA, Breaking Capacity 55 kA, DIN Rail Mount
  • RS Stock No. 271-9502
  • Mfr. Part No. 3VA1510-5EF32-0AA0
Each
HK$43,188.50
Temporarily out of stock
Better World
Siemens SENTRON 3VA1 MCB, 2P, 63A
  • RS Stock No. 224-7877
  • Mfr. Part No. 3VA1163-5ED26-0AA0
Each
HK$3,075.90
In Stock
Schneider Electric Acti9 A9F MCB, 2P, 6.3A, Type AC, 440V AC, 15 kA Breaking Capacity
  • RS Stock No. 288-7080
  • Mfr. Part No. A9F90276
Each
HK$1,058.60
In Stock
SIBA 500A White Automotive Car Fuse, 80V dc
  • RS Stock No. 161-1839
  • Mfr. Part No. 9005805.500
Each
HK$61.20
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.6kA Ekip G Hi-Touch LSIG, 4 channels
  • RS Stock No. 259-3667
  • Mfr. Part No. 1SDA071640R1
Each
HK$118,123.58
Temporarily out of stock
Eaton xEffect - FBSmV RCCB, 40A, 3 Pole, 300mA, Type A, 240/415V ac
  • RS Stock No. 123-528
  • Mfr. Part No. 170221 FBSMV-40/3/03-A
Each
HK$963.50
Temporarily out of stock
Legrand 160A Cartridge Fuse, 61 x 125mm, 500V
  • RS Stock No. 266-3185
  • Mfr. Part No. 0 166 55
1 Box of 3
HK$1,761.37
Temporarily out of stock
Better World
Schneider Electric Acti 9 C120H MCB, 3P, 100A Curve C, 440V AC, 375V DC, 15 kA, 30 kA Breaking Capacity
  • RS Stock No. 776-3026
  • Mfr. Part No. A9N18469
Each
HK$3,466.31
Temporarily out of stock
Siemens SENTRON 5SJ4130 MCB, 1P, 30A Curve D, 400V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 300-019
  • Mfr. Part No. 5SJ4130-8HG41
Each
HK$678.20
In Stock
Eaton 10A Ceramic Cartridge Fuse, 14 x 51mm
  • RS Stock No. 703-8428
  • Mfr. Part No. C14G10
Each (In a Pack of 10)
HK$13.31
Temporarily out of stock
Phoenix Contact Thermal Magnetic Circuit Breaker - TMC Single Pole 250V ac Voltage Rating DIN Rail, 10A Current Rating
  • RS Stock No. 135-497
  • Mfr. Part No. 0914701
1 Pack of 6
HK$3,922.80
Temporarily out of stock
Better World
Siemens SENTRON 5SL4 MCB, 3+N, 40A Curve B, 400V AC, 72V DC
  • RS Stock No. 210-3391
  • Mfr. Part No. 5SL4640-6
Each
HK$1,318.20
Temporarily out of stock
ABB SU200 M MCB, 4P, 35A Curve C, 480V AC, 15 kA Breaking Capacity
  • RS Stock No. 200-860
  • Mfr. Part No. 2CDS274337R0354
Each
HK$4,056.54
Temporarily out of stock
Siemens SENTRON Door Sealing Frame for use with Circuit Breaker 3WL10 / 3VA27
  • RS Stock No. 266-573
  • Mfr. Part No. 3VW9011-0AP01
Each
HK$1,121.70
Temporarily out of stock
ABB S802N MCB, 2P, 16A Curve B, 690V AC, 36 kA Breaking Capacity
  • RS Stock No. 141-064
  • Mfr. Part No. 2CCS892001R0165
Each
HK$2,988.41
In Stock
Better World
Schneider Electric Acti 9 iC60L MCB, 2P, 6A, Type Z, 15 kA Breaking Capacity
  • RS Stock No. 219-9241
  • Mfr. Part No. A9F92206
Each
HK$3,951.39
Temporarily out of stock
Better World
Siemens, Sentron MCCB Molded Case Circuit Breaker 4P 40A, Breaking Capacity 2.5 kA
  • RS Stock No. 245-608
  • Mfr. Part No. 3VA6140-6HM41-0AA0
Each
HK$9,897.10
Temporarily out of stock
Eaton IZMX/INX Electronic Circuit Breaker 630A , Fixed
  • RS Stock No. 127-513
  • Mfr. Part No. 183395 IZMX16B3-V06F-1
Each
HK$36,089.64
In Stock
ABB System Pro M Compact S300P MCB, 1P, 13A Curve C, 240V AC, 72V DC, 25 kA Breaking Capacity
  • RS Stock No. 201-285
  • Mfr. Part No. 2CDS381001R0134
Each
HK$789.73
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