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

2288 of 999+
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 400A 3VA2, 4 channels
  • RS Stock No. 155-912
  • Mfr. Part No. 3VA2440-5JQ42-0AA0
Each
HK$39,733.80
Temporarily out of stock
Better World
ABB S200C MCB, 2P, 16A Curve C, 240V AC, 6 kA Breaking Capacity
  • RS Stock No. 212-1611
  • Mfr. Part No. 2CDS251281R0164
Each
HK$423.90
Temporarily out of stock
ABB F200 RCCB, 100A, 2 Pole, 300mA, Type A, 277V ac
  • RS Stock No. 177-5080
  • Mfr. Part No. 2CSF202201R3900 F202 A S-100/0,3
Each
HK$2,415.71
Temporarily out of stock
Better World
Siemens 5SV3 RCCB, 25A, 4 Pole, 300mA, Type A, 500V ac
  • RS Stock No. 211-9719
  • Mfr. Part No. 5SV3652-6
Each
HK$2,201.10
In Stock
Better World
Siemens SENTRON 5SY5 MCB, 2P, 6A Curve B, 10 kA Breaking Capacity
  • RS Stock No. 203-2201
  • Mfr. Part No. 5SY5206-6
Each
HK$1,203.80
Limited stock
Schneider Electric Acti 9 1 Phase Busbar, 230V ac, 9mm Pitch
  • RS Stock No. 191-9522
  • Mfr. Part No. A9XPN612
Each
HK$194.10
Temporarily out of stock
Legrand DX3 RCD, 10A, 1+N Pole, 300mA, Type C
  • RS Stock No. 731-9904
  • Mfr. Part No. 4 108 12
Each
HK$3,362.49
Temporarily out of stock
Siemens SENTRON 5SJ4208 MCB, 2P, 8A Curve D, 400V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 299-959
  • Mfr. Part No. 5SJ4208-8HG42
Each
HK$1,608.40
In Stock
Mersen 32A Slow-Blow Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 247-2781
  • Mfr. Part No. H1014583
1 Box of 10
HK$1,179.50
In Stock
Eaton xEffect MCB, 1P, 3A Curve D
  • RS Stock No. 230-1037
  • Mfr. Part No. 177486 FAZ6-D3/1
Each
HK$288.46
In Stock
Eaton PFGM RCCB, 63A, 4 Pole, 300mA, Type A, 230 V ac, 400 V ac
  • RS Stock No. 227-0753
  • Mfr. Part No. 267463 PFGM-63/4/03-A
Each
HK$1,024.40
Temporarily out of stock
ABB SMISSLINE TP MCB, 1P, 25A Curve B, 230V AC
  • RS Stock No. 246-2532
  • Mfr. Part No. 2CCS571103R8255
Each
HK$670.05
In Stock
Eaton 160A Bolted Tag Fuse, 500 V dc, 690V ac, 70mm
  • RS Stock No. 182-1731
  • Mfr. Part No. 160EET
Each
HK$2,767.60
In Stock
Better World
Schneider Electric Acti 9 iC60L MCB, 2P, 16A Curve C, 400V AC, 12 → 144V DC, 10 kA Breaking Capacity
  • RS Stock No. 734-9419
  • Mfr. Part No. A9F94216
Each
HK$1,300.80
In Stock
Better World
Schneider Electric, ComPacT NSX MCCB 4P 100A, Fixed Mount
  • RS Stock No. 254-6309
  • Mfr. Part No. C11B44V100L
Each
HK$13,665.30
Temporarily out of stock
40A Cartridge Fuse, 31 x 131mm
  • RS Stock No. 263-308
  • Mfr. Part No. 40MJ31-8
1 Pack of 10
HK$5,502.70
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 4kA 1SDA07, 3 channels
  • RS Stock No. 259-4392
  • Mfr. Part No. 1SDA072574R1
Each
HK$245,233.19
In Stock
SIBA 400A White Automotive Car Fuse, 80V dc
  • RS Stock No. 161-1828
  • Mfr. Part No. 9005805.400
Each (In a Box of 20)
HK$53.975
Temporarily out of stock
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 3P 80A, Breaking Capacity 18.5 kA, Fixed Mount
  • RS Stock No. 231-455
  • Mfr. Part No. 107662 NZMB2-S80-BT-CNA
Each
HK$5,673.43
In Stock
Schneider Electric Acti9 Acti9 C120 MCB, 2P, 63A Curve C, 380 → 415V AC, 250V DC, 20 kA Breaking Capacity
  • RS Stock No. 130-969
  • Mfr. Part No. A9N18360
Each
HK$4,850.17
1
2288
2364
Results per page

Related links