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

53 of 999+
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3906
  • Mfr. Part No. 3VA2063-8JQ36-0AA0
Each
HK$19,277.10
Better World
Siemens, SENTRON MCCB 3P 16A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 874-4360
  • Mfr. Part No. 3VA1196-3EF36-0AA0
Each
HK$3,455.00
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3718
  • Mfr. Part No. 3VA2025-8KP36-0AA0
Each
HK$17,970.60
Better World
Siemens, 0AA0 MCCB 4P 125A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 211-5981
  • Mfr. Part No. 3VA1112-4EE46-0AA0
Each
HK$8,617.50
Better World
Siemens, SENTRON MCCB 4P 160A, Breaking Capacity 25 kA
  • RS Stock No. 209-6972
  • Mfr. Part No. 3VA1116-3EF46-0AA0
Each
HK$9,564.80
Better World
Siemens, SENTRON MCCB 3P 20A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 211-3723
  • Mfr. Part No. 3VA1120-5EF32-0AA0
Each
HK$3,740.90
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 55 kA
  • RS Stock No. 209-6993
  • Mfr. Part No. 3VA1140-5MH32-0AA0
Each
HK$3,415.30
Better World
Siemens, SENTRON MCCB 3P 80A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 874-4341
  • Mfr. Part No. 3VA1180-3EF36-0AA0
Each
HK$3,756.60
Better World
Siemens, SENTRON MCCB 3P 16A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 209-5063
  • Mfr. Part No. 3VA1196-5EF36-0AA0
Each
HK$4,047.70
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 874-4288
  • Mfr. Part No. 3VA1140-3EE36-0AA0
Each
HK$3,285.70
Littelfuse Phosphor Bronze PCB Mount Fuse Clip for 5 x 20mm Cartridge Fuse
  • RS Stock No. 787-4173P
  • Mfr. Part No. 52100001009
Each (Supplied in a Bag)
HK$1.42
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 209-5152
  • Mfr. Part No. 3VA2125-6HN32-0AA0
Each
HK$7,536.30
Better World
Siemens, SENTRON MCCB 4P 25A, Breaking Capacity 55 kA
  • RS Stock No. 210-1647
  • Mfr. Part No. 3VA1125-5EF46-0AA0
Each
HK$5,275.30
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 85 kA
  • RS Stock No. 209-6890
  • Mfr. Part No. 3VA2010-6KP32-0AA0
Each
HK$11,903.70
Better World
Siemens SENTRON 5SY4 MCB, 1P, 8A Curve C, 10 kA Breaking Capacity
  • RS Stock No. 202-7144
  • Mfr. Part No. 5SY4108-7
Each
HK$434.70
Better World
Siemens SENTRON 5SL4 MCB, 1+N, 8A Curve D, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 209-6523
  • Mfr. Part No. 5SL4508-8
Each
HK$674.70
Better World
Siemens SENTRON 5SL6 MCB, 1P, 500mA Curve C, 400V AC, 72V DC
  • RS Stock No. 212-8861
  • Mfr. Part No. 5SL6105-7
Each
HK$187.60
Siemens SENTRON 5SJ MCB, 3P, 10A
  • RS Stock No. 232-2259
  • Mfr. Part No. 5SJ4310-7HG41
Each
HK$1,682.50
Siemens SENTRON 5SJ4 MCB, 1P, 4A Curve C, 14 kA Breaking Capacity
  • RS Stock No. 202-7044
  • Mfr. Part No. 5SJ4104-7HG41
Each
HK$488.10
Littelfuse SMD Non Resettable Fuse 8A, 125V
  • RS Stock No. 738-2873
  • Mfr. Part No. 0154008.DR
Each (In a Pack of 10)
HK$16.84
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