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

2355 of 999+
Temporarily out of stock
Better World
Schneider Electric Acti 9 iC60H MCB, 50A Curve B, 230V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 776-2244
  • Mfr. Part No. A9F06650
Each
HK$796.29
Temporarily out of stock
Eaton 800A Cartridge Fuse, 81 x 143mm
  • RS Stock No. 261-639
  • Mfr. Part No. GSGB800
Each
HK$4,491.20
Temporarily out of stock
Eaton RCCB, 80A, 4 Pole, 300mA, Type A, 230 V ac, 400 V ac
  • RS Stock No. 203-9035
  • Mfr. Part No. 102879 PXF-80/4/03-A
Each
HK$5,211.37
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 125A, Breaking Capacity 70 kA, DIN Rail Mount
  • RS Stock No. 271-9745
  • Mfr. Part No. 3VA1112-6GD42-0AA0
Each
HK$8,236.80
Temporarily out of stock
Electronic Circuit Breaker 10.4A 30V , 1 channels , DIN Rail
  • RS Stock No. 263-097
  • Mfr. Part No. PXS24E10A002 PXS24E-e10/F
Each
HK$444.60
Temporarily out of stock
NZM Circuit Breaker for use with Circuit Breaker
  • RS Stock No. 253-186
  • Mfr. Part No. 192355 NZMN3-PX400
Each
HK$29,451.30
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 25A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-3676
  • Mfr. Part No. 3VA2025-7HN46-0AA0
Each
HK$21,974.90
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 80A, Breaking Capacity 70 kA, Fixed Mount
  • RS Stock No. 271-9439
  • Mfr. Part No. 3VA1180-6GF46-0AA0
Each
HK$6,086.50
Temporarily out of stock
400A Tag Fuse, 190 x 225mm, 690V
  • RS Stock No. 262-639
  • Mfr. Part No. EBH213TTW1
Each
HK$5,160.80
Temporarily out of stock
Eaton 400A 3.92 x 3.93in Modular Fuse Fuse Block, 2.5kV
  • RS Stock No. 261-439
  • Mfr. Part No. BH-1132
Each
HK$3,339.50
Temporarily out of stock
Fuse Holder Fuse Block
  • RS Stock No. 263-161
  • Mfr. Part No. EBF2330V1
Each
HK$1,946.90
Temporarily out of stock
250A Fuse Holder for 280 x 170mm Fuse, 3P, 690V
  • RS Stock No. 263-171
  • Mfr. Part No. EBH123TBS8
Each
HK$2,307.40
Temporarily out of stock
Eaton 16A Cartridge Fuse, 51 x 537mm
  • RS Stock No. 261-574
  • Mfr. Part No. 36TDQSJ16 36KV 16A 2" DIN Resin Seal Fuse
Each
HK$2,966.70
Temporarily out of stock
Eaton 560A Tag Fuse, 660V ac, 133/184mm
  • RS Stock No. 260-712
  • Mfr. Part No. TTM560
Each
HK$2,863.70
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 25A, Fixed Mount
  • RS Stock No. 260-7628
  • Mfr. Part No. C11H4TM025B
Each
HK$7,423.35
Temporarily out of stock
1.6kA Tag Fuse, 140 x 250mm, 690V
  • RS Stock No. 262-642
  • Mfr. Part No. EBH4O3TM2-16
Each
HK$16,450.60
Temporarily out of stock
Eaton 630A Tag Fuse, 660V ac, 133/184mm
  • RS Stock No. 261-697
  • Mfr. Part No. TTM630
Each
HK$2,977.00
Temporarily out of stock
160A Fuse Holder for 51.6 x 97 x 120mm Fuse, 3P, 690V ac
  • RS Stock No. 262-594
  • Mfr. Part No. TD00-DI Triple Integral Base NH00 CE
Each
HK$264.70
Temporarily out of stock
Eaton FAZ MCB, 4P, 6A Curve C
  • RS Stock No. 230-1343
  • Mfr. Part No. 279055 FAZ-C6/4
Each
HK$1,784.55
Temporarily out of stock
Lovato 1 Phase Surge Protector, 50kA
  • RS Stock No. 216-8296
  • Mfr. Part No. SG21NA300
Each
HK$1,523.82
1
2355
2364
Results per page

Related links