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

93 of 999+
ABB FH200 RCCB, 25A, 4 Pole, 300mA, Type AC
  • RS Stock No. 183-3638
  • Mfr. Part No. 2CSF204023R3250
Each
HK$1,471.25
Schneider Electric, PowerPact MCCB 3P 225A, Breaking Capacity 18 kA, DIN Rail Mount
  • RS Stock No. 428-703
  • Mfr. Part No. NJGL36225
Each
HK$35,443.20
10A Cartridge Fuse, 51 x 537mm
  • RS Stock No. 262-386
  • Mfr. Part No. 36TDQSJ10 36KV 10A 2" DIN Resin Seal Fuse
Each
HK$2,935.80
Mersen 10A F GMG Cartridge Fuse, 10 x 38mm
  • RS Stock No. 914-4358
  • Mfr. Part No. ATM10
Each
HK$88.30
Hager Electronic Circuit Breaker 16A NKN, 2 channels
  • RS Stock No. 251-2080
  • Mfr. Part No. NKN216
Each
HK$1,410.32
Better World
Schneider Electric Horizontal Distribution Busbar Trunking, 3m, 630A, Canalis KS Series
  • RS Stock No. 211-0482
  • Mfr. Part No. KSA630ED4306
Each
HK$16,313.20
Eaton 630A Tag Fuse, 660V ac, 133/184mm
  • RS Stock No. 263-423
  • Mfr. Part No. TTM630M670
Each
HK$3,893.80
Siemens 125A Solid Link for LV HRC Fuses
  • RS Stock No. 152-945
  • Mfr. Part No. 3NA3232-4KK01
Each
HK$1,275.90
Phoenix Contact EC-E4 Electronic Circuit Breaker 6A 24V EC-E, 1 channels , DIN Rail
  • RS Stock No. 131-329
  • Mfr. Part No. 0903036
Each (In a Pack of 6)
HK$606.75
ABB Emax2 Electronic Circuit Breaker 1.6kA Ekip Dip LSI, 4 channels
  • RS Stock No. 259-3534
  • Mfr. Part No. 1SDA071512R1
Each
HK$68,283.49
Eaton Fuse Holder Microswitch
  • RS Stock No. 182-1420
  • Mfr. Part No. MAI
Each
HK$1,797.40
Eaton 16A Tag Fuse, 13 x 50mm, 500V
  • RS Stock No. 229-233
  • Mfr. Part No. 16D16 FUSE D1 16A 500 VAC T GL/GG E16
1 Pack of 10
HK$305.60
Siemens 30A Rail Mount Fuse Holder for 10 x 38mm Fuse, 1P, 1kV
  • RS Stock No. 203-2114
  • Mfr. Part No. 3NW7013-4
Each (In a Pack of 12)
HK$142.308
ABB F200 RCCB, 80A, 4 Pole, 30mA, Type B, 400V ac
  • RS Stock No. 176-9625
  • Mfr. Part No. F204B-80/0.03
Each
HK$25,126.05
Siemens SENTRON 3VA9 Cover for use with 3VA2 100/160/250
  • RS Stock No. 218-1810
  • Mfr. Part No. 3VA9164-0KB05
Each
HK$433.80
ABB Emax 2, Tmax XT Signalling Module for use with Circuit Breaker
  • RS Stock No. 231-9321
  • Mfr. Part No. 1SDA074167R1 EKIP 2K-1 E1.2..E6.2-Tmax
Each
HK$1,460.00
Schneider Electric Mureva Enclosure
  • RS Stock No. 119-320
  • Mfr. Part No. 13163M
Each
HK$3,942.55
Schneider Electric MasterPact Connection Unit for use with MTZ1 06-16
  • RS Stock No. 212-066
  • Mfr. Part No. LV833727
Each
HK$2,902.01
Schneider Electric, ComPacT MCCB 4P 630A, Fixed Mount
  • RS Stock No. 260-8220
  • Mfr. Part No. C63L4
Each
HK$57,002.14
400A Tag Fuse, 225 x 225mm, 690V
  • RS Stock No. 262-036
  • Mfr. Part No. EBH223TTM1
Each
HK$3,687.70
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