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

164 of 999+
Temporarily out of stock
Hager BDF RCCB, 25A, 3P+N Pole, 30mA, Type F
  • RS Stock No. 602-171
  • Mfr. Part No. BDF425F
Each
HK$4,410.80
Temporarily out of stock
Hager BD Series RCCB, 25A, 2 Pole, 30mA, Type A-HI, 230V
  • RS Stock No. 597-891
  • Mfr. Part No. BD225
Each
HK$3,893.40
Temporarily out of stock
Hager BFC RCCB, 63A, 4 Pole, 300mA, Type AC
  • RS Stock No. 602-194
  • Mfr. Part No. BFC866
Each
HK$3,539.70
Temporarily out of stock
Eaton 10A Tag Fuse, 440V ac
  • RS Stock No. 263-424
  • Mfr. Part No. XS10
1 Pack of 10
HK$3,018.90
In Stock
Better World
Schneider Electric Multi 9 C60SP MCB, 1P, 1A Curve C, 415V AC, 60V DC, 20 kA Breaking Capacity
  • RS Stock No. 211-2354
  • Mfr. Part No. M9F22101
Each
HK$159.90
Temporarily out of stock
Schneider Electric Compact Undervoltage Release for use with NS630b
  • RS Stock No. 354-356
  • Mfr. Part No. 33822
Each
HK$4,111.70
Temporarily out of stock
Siemens SENTRON 5SY Circuit Breaker, 4P, 25A Curve B, 440V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 664-350
  • Mfr. Part No. 5SY6425-6
Each
HK$1,320.38
In Stock
Schneider Electric, ComPacT new generation Circuit breaker 4P 160A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 110-316
  • Mfr. Part No. C12B44V160B
Each
HK$28,971.23
Temporarily out of stock
ABB System Pro M Compact SU200 MR Circuit Breaker, 2P, 4A Curve K, 400V AC, 15 kA Breaking Capacity
  • RS Stock No. 201-186
  • Mfr. Part No. 2CDS272347R0337
Each
HK$3,241.79
In Stock
Legrand 4A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 180-6108
  • Mfr. Part No. 0 130 04
Each (In a Box of 10)
HK$20.87
Temporarily out of stock
ABB SU200 M MCB, 2P, 8A Curve C, 440V AC, 96V DC, 15 kA Breaking Capacity
  • RS Stock No. 201-031
  • Mfr. Part No. 2CDS272337R0084
Each
HK$1,846.92
Temporarily out of stock
Eaton xE?ect - FRCmM-NA RCCB, 40A, 2 Pole, 300mA, 240/415V ac
  • RS Stock No. 120-300
  • Mfr. Part No. 167123 FRCMM-40/2/03-G/A-NA
Each
HK$2,299.40
Temporarily out of stock
ABB SU200 M MCB, 3P, 32A Curve K, 400V AC, 15 kA Breaking Capacity
  • RS Stock No. 200-205
  • Mfr. Part No. 2CDS273337R0537
Each
HK$3,351.87
In Stock
Mersen 500mA FF Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 188-6726
  • Mfr. Part No. J084303
Each (In a Pack of 10)
HK$30.96
Temporarily out of stock
Siemens SENTRON 5SY Circuit Breaker, 4P, 10A Curve B, 440V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 664-348
  • Mfr. Part No. 5SY6410-6
Each
HK$1,160.05
Temporarily out of stock
Schneider Electric MASTERPACT NW MCB, 3P, 3.2kA
  • RS Stock No. 247-1898
  • Mfr. Part No. 48312
Each
HK$289,865.43
In Stock
Littelfuse 4A Surface Mount Fuse Block, 125V ac/dc
  • RS Stock No. 219-6125P
  • Mfr. Part No. 0154004.DR
Each (Supplied on a Reel)
HK$14.25
In Stock
Littelfuse 200A Panel Mount Automotive Fuse Block
  • RS Stock No. 878-3245
  • Mfr. Part No. 0498900.TXN
Each
HK$89.40
In Stock
Schneider Electric, ComPacT MCCB 2P 50A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 654-493
  • Mfr. Part No. C10M2TM050
Each
HK$3,301.73
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.6kA 1SDA07, 3 channels
  • RS Stock No. 259-4224
  • Mfr. Part No. 1SDA072348R1
Each
HK$89,858.96
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