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

205 of 999+
In Stock
Better World
Schneider Electric Acti 9 Acti9 iDT40T MCB, 3P, 16A Curve C, 400V AC
  • RS Stock No. 239-9969
  • Mfr. Part No. A9P22316
Each
HK$851.30
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 55 kA
  • RS Stock No. 209-6849
  • Mfr. Part No. 3VA1163-5ED32-0AA0
Each
HK$3,081.40
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3909
  • Mfr. Part No. 3VA2063-8KP32-0AA0
Each
HK$18,296.50
Temporarily out of stock
Better World
Siemens, 0AA0 MCCB 3P 40A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 211-6016
  • Mfr. Part No. 3VA1140-5EF42-0AA0
Each
HK$4,851.90
Temporarily out of stock
ABB SMISSLINE TP MCB, 2P, 500mA, Type Z, 440V AC
  • RS Stock No. 246-2468
  • Mfr. Part No. 2CCS562001R1988
Each
HK$1,687.51
In Stock
Better World
Schneider Electric Multi 9 C60SP MCB, 2P, 10A Curve B, 440V AC, 125V DC, 15 kA Breaking Capacity
  • RS Stock No. 211-2339
  • Mfr. Part No. M9F21210
Each
HK$330.40
Limited stock
ETA Thermal Circuit Breaker - 3120-N 5 Pole 50 V DC, 240 V AC Voltage Rating, 5A Current Rating
  • RS Stock No. 210-2105
  • Mfr. Part No. 3120-N551-H7T1-W19DG4-5A
Each
HK$286.60
Temporarily out of stock
ABB S302 MCB, 2P, 4A Curve C, 415V AC, 125V DC, 100 kA Breaking Capacity
  • RS Stock No. 203-692
  • Mfr. Part No. 2CDS382001R0044
Each
HK$2,197.92
In Stock
Eaton FAZ MCB, 3+N, 32A Curve C
  • RS Stock No. 230-1342
  • Mfr. Part No. 278978 FAZ-C32/3N
Each
HK$1,360.60
Temporarily out of stock
Better World
ABB S200C MCB, 3P, 10A Curve C, 415V AC, 6 kA Breaking Capacity
  • RS Stock No. 212-1643
  • Mfr. Part No. 2CDS253280R0104
Each
HK$547.90
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 20A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 874-4183
  • Mfr. Part No. 3VA1120-3EE36-0AA0
Each
HK$3,285.70
Temporarily out of stock
Better World
Schneider Electric, Compact MCCB 3P 50A, Breaking Capacity 16 kA, DIN Rail Mount
  • RS Stock No. 178-7957
  • Mfr. Part No. LV426751
Each
HK$6,606.90
Temporarily out of stock
ABB MCCB Molded Case Circuit Breaker 3P 320A, Fixed Mount
  • RS Stock No. 250-4085
  • Mfr. Part No. 1SDA054354R1
Each
HK$31,909.00
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 50A, Breaking Capacity 25 kA
  • RS Stock No. 209-6826
  • Mfr. Part No. 3VA1150-3ED42-0AA0
Each
HK$3,653.80
Temporarily out of stock
ABB SMISSLINE TP MCB, 2P, 32A Curve B, 400V AC
  • RS Stock No. 246-2579
  • Mfr. Part No. 2CCS572001R0325
Each
HK$806.02
In Stock
Better World
ABB S200C MCB, 2P, 4A Curve B, 415V AC, 6 kA Breaking Capacity
  • RS Stock No. 212-1618
  • Mfr. Part No. 2CDS252280R0045
Each
HK$392.50
Temporarily out of stock
Eaton 10A Panel Mount Fuse Holder for 5 x 20mm Fuse, 250V ac
  • RS Stock No. 233-0615
  • Mfr. Part No. BK8-HTC-603M
1 Box of 800
HK$13,911.50
Temporarily out of stock
Eaton Three Phase Surge Protector, 40kA, 1.8kV, DIN Rail Mount
  • RS Stock No. 121-150
  • Mfr. Part No. 167624 SPCT2-385-3+NPE
Each
HK$2,216.95
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 55 kA
  • RS Stock No. 209-6819
  • Mfr. Part No. 3VA1140-5EE36-0AA0
Each
HK$3,644.10
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 25A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3719
  • Mfr. Part No. 3VA2025-8KP42-0AA0
Each
HK$20,766.50
1
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