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

2278 of 999+
Temporarily out of stock
Schneider Electric, ComPacT New Generation MCCB 4P 30A, Breaking Capacity 25 kA, Screw Mount
  • RS Stock No. 244-919
  • Mfr. Part No. BDL46030LU
Each
HK$4,866.90
Temporarily out of stock
Schneider Electric PowerPact Thermal Magnetic Circuit Breaker - PowerPacT 4 Pole 525V Voltage Rating Clip-On, 100A
  • RS Stock No. 358-219
  • Mfr. Part No. BGL46100LU
Each
HK$13,266.52
Temporarily out of stock
Siemens, SENTRON MCCB 3P 630A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 270-4824
  • Mfr. Part No. 3VA2563-7HM32-0AA0
Each
HK$63,911.70
In Stock
Lovato ModuLo P1MB MCB, 2P, 4A Curve B, 230V AC, 80V DC, 10 kA Breaking Capacity
  • RS Stock No. 825-5665
  • Mfr. Part No. P1MB2PB04
Each
HK$467.90
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 63A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3872
  • Mfr. Part No. 3VA2063-7JP42-0AA0
Each
HK$31,033.30
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4752
  • Mfr. Part No. 3VA2163-7JQ32-0AA0
Each
HK$17,105.70
Temporarily out of stock
HENSEL ENYBOARD Distribution Board, 63 A
  • RS Stock No. 117-046
  • Mfr. Part No. KV 9440 M
Each
HK$2,196.50
Temporarily out of stock
Better World
Schneider Electric, NSX Range MCCB 4P 160A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 849-4260
  • Mfr. Part No. LV430642
Each
HK$4,864.20
In Stock
Eaton RCD, 25A, 4 Pole, 300mA, Type AC
  • RS Stock No. 922-8623
  • Mfr. Part No. 235408 PFIM-25/4/03-MW
Each
HK$1,028.40
In Stock
ABB Surge Protector, DIN Rail Mount
  • RS Stock No. 136-3874
  • Mfr. Part No. 1SNA295405R2700
Each
HK$80.55
Temporarily out of stock
Better World
Siemens, Sentron MCCB Molded Case Circuit Breaker 4P 100A, Breaking Capacity 3 kA
  • RS Stock No. 245-361
  • Mfr. Part No. 3VA6210-8HM41-0AA0
Each
HK$30,134.30
In Stock
Better World
Schneider Electric Acti 9 iC60N MCB, 2P, 16A Curve C, 100 → 130V AC, 12 → 144V DC, 6 kA Breaking Capacity
  • RS Stock No. 734-9065
  • Mfr. Part No. A9F77216
Each
HK$699.16
Temporarily out of stock
RS PRO Residential RCCBs, 25A, 2 Pole, 30mA, Type A, 230V
  • RS Stock No. 284-2367
Each
HK$299.27
In Stock
Better World
Schneider Electric Multi 9 C60N MCB, 2P, 6A Curve C, 10 kA Breaking Capacity
  • RS Stock No. 214-2064
  • Mfr. Part No. M9F11206
Each
HK$949.70
Temporarily out of stock
Schneider Electric ComPacT Cover Frame for use with ComPacT NS630b
  • RS Stock No. 654-141
  • Mfr. Part No. C125H3WM
Each
HK$36,891.80
Temporarily out of stock
ABB System Pro M Compact S200 M UC MCB, 1P, 20A Curve B, 230V AC, 220V DC, 10 kA Breaking Capacity
  • RS Stock No. 200-978
  • Mfr. Part No. 2CDS271061R0205
Each
HK$1,235.69
Temporarily out of stock
Better World
Siemens, 0AA0 MCCB 4P 160A, Breaking Capacity 70 kA, Fixed Mount
  • RS Stock No. 211-5993
  • Mfr. Part No. 3VA1116-6EE46-0AA0
Each
HK$9,066.70
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 70 kA, Fixed Mount
  • RS Stock No. 271-9336
  • Mfr. Part No. 3VA1140-6ED36-0AA0
Each
HK$3,353.00
Temporarily out of stock
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 10 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-176
  • Mfr. Part No. 3VA5110-6GD41-0AA0
Each
HK$6,994.00
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 40A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 268-484
  • Mfr. Part No. 3VA6140-5JP31-2AA0
Each
HK$14,899.70
1
2278
2364
Results per page

Related links