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

2258 of 999+
Better World
Siemens, SENTRON MCCB 4P 63A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3898
  • Mfr. Part No. 3VA2063-8HN42-0AA0
Each
HK$12,183.20
Schneider Electric, PowerPact Circuit breaker 1P 125A, Breaking Capacity 35 kA, DIN Rail Mount
  • RS Stock No. 357-683
  • Mfr. Part No. BGF16125
Each
HK$8,530.60
Schneider Electric Multi9 M9F1 MCB, 1P, 2A Curve B, 415V AC, 72V DC, 3 kA Breaking Capacity
  • RS Stock No. 212-190
  • Mfr. Part No. M9F10102
Each
HK$197.43
Eaton 750mA T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 412-469
  • Mfr. Part No. TDC11-750MA
Each (In a Pack of 10)
HK$10.16
RS PRO 8A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-497
Each (In a Pack of 10)
HK$3.15
ABB Emax2 Electronic Circuit Breaker 630A Ekip Touch LI, 4 channels
  • RS Stock No. 259-3410
  • Mfr. Part No. 1SDA071344R1
Each
HK$48,605.49
Siemens SENTRON 5SY6 MCB, 3P, 15A Curve C, 400V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 610-519
  • Mfr. Part No. 5SY6318-7
Each
HK$1,216.64
Eaton xEffect - FRCmM RCCB, 40A, 2 Pole, 30mA, Type A, 110V
  • RS Stock No. 127-425
  • Mfr. Part No. 180607 FRCMM-40/2/003-A-110
Each
HK$1,377.80
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 210-1714
  • Mfr. Part No. 3VA2110-5KP32-0AA0
Each
HK$11,905.00
ABB S800S MCB, 4P, 40A Curve D, 240V AC, 50 kA Breaking Capacity
  • RS Stock No. 140-255
  • Mfr. Part No. 2CCS864001R0401
Each
HK$8,771.60
Schurter 12.5A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 144-1842
  • Mfr. Part No. 8020.5022.G
Each (In a Bag of 10)
HK$8.45
Better World
Schneider Electric Acti 9 IC60L MCB, 4P, 32A, Type Z, 400V AC, 250V DC, 20 kA, 15 kA Breaking Capacity
  • RS Stock No. 212-0132
  • Mfr. Part No. A9F92432
Each
HK$3,237.40
BB-EV 3 Phase Busbar, 690V, 27mm Pitch
  • RS Stock No. 247-516
  • Mfr. Part No. 168870 BB-EVP-10/3P-1,5MU
Each
HK$669.70
Eaton xComfort KLV Distribution Board Enclosure
  • RS Stock No. 125-092
  • Mfr. Part No. 178824 KLV-24HWS-F
Each
HK$1,446.25
Schneider Electric RCBO, 10A Current Rating, 1P Poles, Type C, Acti9 Range
  • RS Stock No. 245-019
  • Mfr. Part No. A9D01810
Each
HK$2,021.40
Eaton 15A British Standard Fuse, 240V ac, 37.4mm
  • RS Stock No. 414-730
  • Mfr. Part No. GSA15
Each (In a Pack of 5)
HK$206.60
Eaton NZM Circuit Breaker for use with Circuit Breaker
  • RS Stock No. 246-853
  • Mfr. Part No. 191604 NZMN3-VX630
Each
HK$27,483.57
Eaton IZMX/INX Electronic Circuit Breaker 2.5kA , 3 channels , Withdrawable
  • RS Stock No. 132-705
  • Mfr. Part No. 183739 IZMX40N3-V25W-1
Each
HK$160,781.09
Better World
Siemens SENTRON Electronic Circuit Breaker 160A 3VA2, 4 channels Type N
  • RS Stock No. 157-150
  • Mfr. Part No. 3VA2216-7HL42-0AA0
Each
HK$20,209.40
ABB RCBO, 25A Current Rating, 3P Poles, Type B
  • RS Stock No. 237-5086
  • Mfr. Part No. 2CSR253101R1255
Each
HK$2,843.13
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