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

110 of 999+
Better World
ABB System Pro M Compact S200M MCB, 2P, 20A Curve C, 440V AC, 125V DC, 10 kA Breaking Capacity
  • RS Stock No. 132-116
  • Mfr. Part No. 2CDS272001R0204 S202M-C20
Each
HK$506.20
Better World
Siemens SENTRON Wire Connector for use with 3VA1
  • RS Stock No. 269-7069
  • Mfr. Part No. 3VA9114-0JB10
Each (In a Pack of 4)
HK$70.125
Eaton 2A Tag Fuse, 550V ac
  • RS Stock No. 228-901
  • Mfr. Part No. NITD2
1 Pack of 20
HK$1,608.70
Eaton 63A Cartridge Fuse, 88 x 537mm
  • RS Stock No. 261-575
  • Mfr. Part No. 36TXQEJ63
Each
HK$8,405.60
Eaton 80A Cartridge Fuses, 76.2 x 565mm
  • RS Stock No. 254-750
  • Mfr. Part No. 24AFIHA80
Each
HK$12,000.60
Eaton Cartridge Fuse, 8 x 3in
  • RS Stock No. 261-464
  • Mfr. Part No. FP-3
Each
HK$790.50
Eaton 400A Tag Fuse, 225 x 225mm, 690V
  • RS Stock No. 261-705
  • Mfr. Part No. EBH223TTW1
Each
HK$5,335.90
ABB System Pro M Compact S200M MCB, 1P, 63A Curve K, 230/400V AC, 72V DC, 15 kA Breaking Capacity
  • RS Stock No. 204-308
  • Mfr. Part No. 2CDS271001R0607
Each
HK$1,361.38
Schurter SMD Non Resettable Fuse 630mA, 125 V dc, 250V ac
  • RS Stock No. 736-0738P
  • Mfr. Part No. 3403.0164.24
Each (Supplied on a Reel)
HK$4.69
Schurter SMD Non Resettable Fuse 630mA, 125 V dc, 250V ac
  • RS Stock No. 173-8006
  • Mfr. Part No. 3403.0164.24
1 Reel of 2000
HK$9,663.80
Siemens SENTRON Wire Connector for use with 3VA2 100/160/250
  • RS Stock No. 269-7130
  • Mfr. Part No. 3VA9224-0JC22
Each (In a Pack of 4)
HK$272.325
Siemens SENTRON Wire Connector for use with 3VA15/25 1000
  • RS Stock No. 269-7233
  • Mfr. Part No. 3VA9604-0JC43
Each (In a Pack of 4)
HK$782.75
Siemens SENTRON Connection Unit for use with 3VA15/25 1000
  • RS Stock No. 269-7225
  • Mfr. Part No. 3VA9603-0QB00
Each (In a Pack of 3)
HK$351.933
Siemens SENTRON Wire Connector for use with 3VA5/6 400/600
  • RS Stock No. 269-7177
  • Mfr. Part No. 3VA9373-0JD13
Each (In a Pack of 3)
HK$1,245.90
Better World
Siemens SENTRON Wire Connector for use with 3VA1 400/630 and 3VA2 400/630
  • RS Stock No. 210-9380
  • Mfr. Part No. 3VA9384-0JB13
Each
HK$1,080.00
Bourns 0.75A Resettable Fuse, 13.2V
  • RS Stock No. 647-8190
  • Mfr. Part No. MF-MSMF075-2
Each (In a Pack of 10)
HK$2.37
Eaton 600A Tag Fuse, 101 x 101mm
  • RS Stock No. 261-691
  • Mfr. Part No. TPL-CZ
Each
HK$2,070.20
Schneider Electric, ComPacT New Generation MCCB 4P 25A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 214-772
  • Mfr. Part No. C11H44V025L
Each
HK$14,977.64
Bourns 1.5A Resettable Fuse, 15V
  • RS Stock No. 647-8112P
  • Mfr. Part No. MF-SM150-2
Each (Supplied on a Reel)
HK$2.66
ABB S804S MCB, 4P, 13A, UC-B, 1000V DC, 50 kA Breaking Capacity
  • RS Stock No. 140-253
  • Mfr. Part No. 2CCS864001R1135
Each
HK$8,735.54
1
110
2364
Results per page

Related links