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

106 of 999+
Phoenix Contact 2A T Cartridge Fuse, 5 x 20mm
  • RS Stock No. 512-401
  • Mfr. Part No. 1457326
1 Pack of 10
HK$78.50
Littelfuse 0.75A Resettable Fuse, 72V
  • RS Stock No. 517-6663P
  • Mfr. Part No. RXEF075
Each (Supplied in a Bag)
HK$2.61
NEMIQ Earthing Strap Copper
  • RS Stock No. 288-4611
  • Mfr. Part No. JF 16-100 M10
Each
HK$191.60
Eaton 630A Tag Fuse, 660V ac, 133/184mm
  • RS Stock No. 263-423
  • Mfr. Part No. TTM630M670
Each
HK$3,893.80
31.5A Cartridge Fuse, 76 x 537mm
  • RS Stock No. 262-389
  • Mfr. Part No. 36TFQSJ31.5
Each
HK$4,408.80
Better World
Siemens, 0AA0 MCCB 3P 100A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 211-6047
  • Mfr. Part No. 3VA2010-5JQ32-0AA0
Each
HK$13,481.80
Schneider Electric ComPacT New Generation Trip Unit for use with ComPacT NSX 100/160/250 Circuit Breakers
  • RS Stock No. 260-9345
  • Mfr. Part No. C1036M025
Each
HK$19,247.36
Better World
Siemens RCBO, 16A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type A, SENTRON Range
  • RS Stock No. 187-3283
  • Mfr. Part No. 5SV1316-6KK16
Each
HK$1,013.90
Eaton 700A Cartridge Fuse
  • RS Stock No. 261-440
  • Mfr. Part No. BH-3033
Each
HK$5,064.10
Schneider Electric PrismaSeT Busbar
  • RS Stock No. 130-540
  • Mfr. Part No. LVS04482
Each
HK$23,825.73
Bourns Surface Mount Fuse 7A, 48V dc
  • RS Stock No. 245-9232P
  • Mfr. Part No. SF-1206F700M-2
Each (Supplied on a Reel)
HK$5.34
Siemens SENTRON Busbar, 60mm Pitch
  • RS Stock No. 196-3721
  • Mfr. Part No. 8US19482AA00
Each
HK$6,728.50
RS PRO 32A British Standard Fuse, F1, 550V ac
  • RS Stock No. 521-2955
Each (In a Pack of 5)
HK$57.50
Schneider Electric, ComPacT MCCB 4P 630A, Fixed Mount
  • RS Stock No. 260-8220
  • Mfr. Part No. C63L4
Each
HK$57,002.14
400A Tag Fuse, 225 x 225mm, 690V
  • RS Stock No. 262-036
  • Mfr. Part No. EBH223TTM1
Each
HK$3,687.70
ABB Emax2 Electronic Circuit Breaker 1kA 1SDA07, 4 channels
  • RS Stock No. 259-4640
  • Mfr. Part No. 1SDA072913R1
Each
HK$76,461.60
Schneider Electric Terminal for use with Compact INS, Compact INSE Circuit Breaker
  • RS Stock No. 247-1718
  • Mfr. Part No. 28948
Each
HK$453.20
Littelfuse SMD Non Resettable Fuse 4A, 125V ac/dc
  • RS Stock No. 541-3669P
  • Mfr. Part No. 0452004.MRL
Each (Supplied on a Reel)
HK$7.26
Sato Parts F-200 Series Fuse Cover for 6.3 x 32 mm, 6.35 x 30 x 6.35 x 31.8 mm Fuse
  • RS Stock No. 229-4963
  • Mfr. Part No. F-200-C
Each
HK$5.10
Better World
Schneider Electric Acti 9 iC60N MCB, 2P, 4A Curve C, 400V AC, 125V DC, 6 kA Breaking Capacity
  • RS Stock No. 734-9220
  • Mfr. Part No. A9F74204
Each
HK$1,133.40
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