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

47153 Products showing for Fuses & Circuit Breakers

2256 of 999+
Temporarily out of stock
Schneider Electric Acti9 SE10 MCB Mini Circuit Breaker, 1P, 40A Curve B, 240V AC, 10000 A Breaking Capacity
  • RS Stock No. 335-289
  • Mfr. Part No. SE10B140
Each
HK$284.12
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 320A, Fixed Mount
  • RS Stock No. 260-8126
  • Mfr. Part No. C40N32M320
Each
HK$35,149.32
Temporarily out of stock
ABB System Pro M Compact SU200 MR Circuit Breaker, 2P, 63A Curve K, 400V AC, 15 kA Breaking Capacity
  • RS Stock No. 200-167
  • Mfr. Part No. 2CDS272347R0607
Each
HK$5,197.46
Temporarily out of stock
Siemens 5SV3 RCCB, 125A, 4 Pole, 30mA, Type A, 230/400V
  • RS Stock No. 218-869
  • Mfr. Part No. 5SV3345-6
Each
HK$16,992.40
Temporarily out of stock
Eaton 50A gG/gL Cartridge Fuse, 22.2 x 58mm
  • RS Stock No. 228-765
  • Mfr. Part No. C22G50 CYLINDRICAL FUSE 22 x 58 50A GG 690V AC
1 Pack of 10
HK$390.40
In Stock
Littelfuse 6.3A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 542-1250
  • Mfr. Part No. 021806.3MXP
Each (In a Pack of 10)
HK$5.62
Temporarily out of stock
Eaton Eaton Moeller Series NZM Adapter for use with N(S)3, NZM3, PN3
  • RS Stock No. 240-645
  • Mfr. Part No. 104556 NZM3-XAD550
Each
HK$1,832.24
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 250A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 260-535
  • Mfr. Part No. 3VA6225-8HM31-0AA0
Each
HK$23,102.90
In Stock
Schneider Electric RCBO, 20A Current Rating, 4P Poles, 30mA Trip Sensitivity, Type C, Acti9 Range
  • RS Stock No. 130-443
  • Mfr. Part No. A9D77420
Each
HK$12,887.61
Temporarily out of stock
ABB, SACE Tmax T MCCB Molded Case Circuit Breaker 3P 1.25kA, Fixed Mount
  • RS Stock No. 232-0158
  • Mfr. Part No. 1SDA062882R1 T7S-M 1250A PR231-LS/I FF
Each
HK$37,356.08
Temporarily out of stock
ABB System Pro M Compact S200 M UC MCB, 2P, 10A Curve B, 400V AC, 440V DC, 10 kA Breaking Capacity
  • RS Stock No. 200-057
  • Mfr. Part No. 2CDS272061R0105
Each
HK$2,440.17
Temporarily out of stock
Better World
ABB, XT2V MCCB 4P 160A, Fixed Mount
  • RS Stock No. 236-7453
  • Mfr. Part No. 1SDA067715R1 XT2V 160 TMA 160A FF
Each
HK$11,888.45
In Stock
ABB RCBO, 25A Current Rating, 4P Poles, Type B
  • RS Stock No. 237-5101
  • Mfr. Part No. 2CSR254001R1255
Each
HK$3,134.40
Temporarily out of stock
Better World
Schneider Electric Acti 9 iC60N MCB, 25A Curve C, 240V AC, 72V DC, 6 kA Breaking Capacity
  • RS Stock No. 776-3525
  • Mfr. Part No. A9F77625
Each
HK$973.05
Temporarily out of stock
ABB S303 MCB, 3P, 25A Curve K, 415V AC, 125V DC, 100 kA Breaking Capacity
  • RS Stock No. 204-279
  • Mfr. Part No. 2CDS383001R0517
Each
HK$3,044.74
Temporarily out of stock
Siemens SENTRON 4 Phase Busbar
  • RS Stock No. 187-5212
  • Mfr. Part No. 5ST3746-5
Each
HK$1,447.00
In Stock
Eaton 6A F Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 851-1208
  • Mfr. Part No. KTK-6
Each
HK$295.00
Temporarily out of stock
ABB System Pro M Compact S300P MCB, 1+N, 13A Curve C, 240V AC, 72V DC, 25 kA Breaking Capacity
  • RS Stock No. 204-468
  • Mfr. Part No. 2CDS381103R0134
Each
HK$1,550.91
Temporarily out of stock
Siemens 230V ac Control Station Switch
  • RS Stock No. 622-0676
  • Mfr. Part No. 5TT4104-0
Each
HK$585.50
Temporarily out of stock
Eaton 40A NH Fuse, NH000, 690V ac
  • RS Stock No. 181-8628
  • Mfr. Part No. 40NHM000B-690
Each
HK$96.49
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