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

47266 Products showing for Fuses & Circuit Breakers

23 of 999+
Eaton 1.25A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 537-1199
  • Mfr. Part No. S500-1.25-R
Each (In a Pack of 10)
HK$2.48
Schurter 1A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 789-7797
  • Mfr. Part No. 0001.2504
Each (In a Bag of 10)
HK$5.93
ABB Emax2 Electronic Circuit Breaker 1.25kA 1SDA07, 4 channels
  • RS Stock No. 259-4576
  • Mfr. Part No. 1SDA072826R1
Each
HK$71,647.08
Schneider Electric Mureva Distribution Board, 90 A
  • RS Stock No. 119-360
  • Mfr. Part No. 13172M
Each
HK$2,700.21
Littelfuse PC Board Non Resettable Fuse 3A, 125V ac/dc
  • RS Stock No. 738-3024P
  • Mfr. Part No. 0251003.MRT1L
Each (Supplied in a Bag)
HK$4.60
Better World
Schneider Electric Acti 9 iC60H MCB, 3P, 63A Curve C, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3405
  • Mfr. Part No. A9F54363
Each
HK$2,129.60
RS PRO 3A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 177-8013
1 Box of 1000
HK$2,156.21
ABB, SACE Tmax XT MCCB Molded Case Circuit Breaker 3P 160A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 232-0237
  • Mfr. Part No. 1SDA067058R1 XT2N 160 Ekip LS/I 160A FF
Each
HK$6,061.10
ETA Thermal Circuit Breaker - 3600 Single Pole 250V Voltage Rating Panel Mount, 6A Current Rating
  • RS Stock No. 729-2843
  • Mfr. Part No. 3600-P10-Si-6A
Each
HK$812.20
ABB Emax2 Electronic Circuit Breaker 630A 1SDA07, 4 channels
  • RS Stock No. 259-4473
  • Mfr. Part No. 1SDA072681R1
Each
HK$32,796.24
ABB Emax2 Electronic Circuit Breaker 2.5kA 1SDA07, 3 channels
  • RS Stock No. 259-4291
  • Mfr. Part No. 1SDA072425R1
Each
HK$114,856.17
Lovato 32A Fuse Holder for 10 x 38mm Fuse, 1P, 690V ac
  • RS Stock No. 248-5512
  • Mfr. Part No. FB01F1PL
Each
HK$124.10
WJ Furse Lightning Earth Inspection Pit W. 300mm x 300mm H. 158mm 5000kg
  • RS Stock No. 124-2510
  • Mfr. Part No. 7TCA083320R0011 PT205
Each
HK$374.70
Better World
Siemens SENTRON 5SY7 MCB, 3+N, 16A Curve C
  • RS Stock No. 216-5946
  • Mfr. Part No. 5SY7616-7
Each
HK$1,475.30
Lovato ModuLo P1MB MCB, 4P, 32A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 825-5977
  • Mfr. Part No. P1MB4PC32
Each
HK$942.50
Eaton 160A Centred Tag Fuse, NH000, 690V
  • RS Stock No. 182-1595
  • Mfr. Part No. 170M1569D
Each
HK$1,738.00
Better World
ABB Emax2 Electronic Circuit Breaker 1.25kA Ekip G Hi-Touch LSIG, 3 channels
  • RS Stock No. 259-3107
  • Mfr. Part No. 1SDA070960R1
Each
HK$94,923.82
ABB Emax2 Electronic Circuit Breaker 1.6kA Ekip Touch LSIG, 4 channels
  • RS Stock No. 259-4708
  • Mfr. Part No. 1SDA072986R1
Each
HK$92,963.11
ETI 6A DI Diazed Fuse, E16 Thread Size, gG - gL, 500V ac
  • RS Stock No. 417-830
  • Mfr. Part No. 2311403
Each (In a Pack of 5)
HK$9.32
ABB, SACE Tmax XT MCCB Molded Case Circuit Breaker 3P 400A, Fixed Mount
  • RS Stock No. 231-9337
  • Mfr. Part No. 1SDA100415R1 XT5S 400 TMA 400-4000 3pFF
Each
HK$11,097.71
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