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

132 of 999+
Eaton IZMX/INX Electronic Circuit Breaker 4kA , 3 channels , Fixed
  • RS Stock No. 132-658
  • Mfr. Part No. 183633 IZMX40N3-P40F-1
Each
HK$292,170.96
TE Connectivity Thermal Circuit Breaker - W31 Single Pole 50 V dc, 240V ac Voltage Rating, 5A Current Rating
  • RS Stock No. 782-0946
  • Mfr. Part No. W31-X2M1G-5
Each
HK$358.30
Schneider Electric Thermal Circuit Breaker - GB2 1P + N Pole 250V ac Voltage Rating DIN Rail Mount, 10A Current Rating
  • RS Stock No. 610-0910
  • Mfr. Part No. GB2CD16
Each
HK$301.30
Better World
Siemens, SENTRON MCCB 4P 600A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 249-272
  • Mfr. Part No. 3VA6460-5KP41-0AA0
Each
HK$46,624.40
TE Connectivity Thermal Circuit Breaker - W23 Single Pole 50 V dc, 250V ac Voltage Rating, 5A Current Rating
  • RS Stock No. 782-0886
  • Mfr. Part No. W23-X1A1G-5
Each
HK$268.60
Schneider Electric RCBO, 16A Current Rating, 1P Poles, Type B, Acti9 Range
  • RS Stock No. 245-142
  • Mfr. Part No. A9D56816
Each
HK$1,536.20
Schneider Electric, ComPacT New Generation MCCB 4P 250A
  • RS Stock No. 214-756
  • Mfr. Part No. LV429495
Each
HK$21,001.60
Eaton Fuse Holder Fuse Holder
  • RS Stock No. 261-465
  • Mfr. Part No. FRN01C
1 Pack of 15
HK$1,280.90
Siemens SENTRON 4 Phase Busbar
  • RS Stock No. 187-5193
  • Mfr. Part No. 5ST3720
Each
HK$1,626.00
Eaton 160A Tag Fuse, 110 x 210mm, 690V
  • RS Stock No. 262-024
  • Mfr. Part No. EBH0013TTM8 SIZE 00 HOR FSD TOP
Each
HK$975.40
Eaton 400A Tag Fuse, 190 x 215mm, 690V
  • RS Stock No. 263-177
  • Mfr. Part No. EBH213TBM1
Each
HK$3,553.80
Better World
Schneider Electric TeSys Thermal Circuit Breaker - GV4PEM 3 Pole 690V ac Voltage Rating, 2A Current Rating
  • RS Stock No. 175-1557
  • Mfr. Part No. GV4PEM02N6
Each
HK$5,344.60
RS PRO 1.5A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 668-6032
Each (In a Pack of 10)
HK$2.58
Schneider Electric, ComPacT NSX Circuit breaker 1P 63A, Breaking Capacity 25 kA, Busbar System
  • RS Stock No. 654-249
  • Mfr. Part No. IL0631P252
Each
HK$1,612.07
Eaton 20A D2 Diazed Fuse, gG, 500V ac
  • RS Stock No. 181-8910
  • Mfr. Part No. 20D27
Each
HK$25.61
ABB S802S MCB, 2P, 10A Curve B, 500V DC, 50 Ka Breaking Capacity
  • RS Stock No. 140-905
  • Mfr. Part No. 2CCS862001R1105
Each
HK$4,411.54
Schneider Electric, ComPacT MCCB 4P 630A, Breaking Capacity 50 kA, Fixed Mount
  • RS Stock No. 655-143
  • Mfr. Part No. C063N450FM
Each
HK$48,348.70
RS PRO SMD Non-Resettable Surface Mount Fuse 3A, 63V
  • RS Stock No. 252-2201
Each (On a Tape of 4000)
HK$1.101
Siemens 35A DIII Diazed Fuse, E33 Thread Size, gR, 500V
  • RS Stock No. 203-3951
  • Mfr. Part No. 5SD450
Each (In a Pack of 5)
HK$149.30
HENSEL ENYBOARD Distribution Board, 101 A
  • RS Stock No. 117-250
  • Mfr. Part No. FC PN 10
Each
HK$96.90
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