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

100 of 999+
Better World
Schneider Electric, ComPact MCCB, Fixed Mount
  • RS Stock No. 221-0942
  • Mfr. Part No. LV429393
Each
HK$1,296.97
RS PRO 3 Phase Industrial Surge Protector, 140kA, 2.5kV, DIN Rail Mount
  • RS Stock No. 101-770
Each
HK$7,003.99
Better World
Schneider Electric, ComPacT NSX MCCB 3P 160A, Fixed Mount
  • RS Stock No. 254-6345
  • Mfr. Part No. C16F3TM160
Each
HK$9,205.00
Phoenix Contact Thermal Circuit Breaker - CB TM1 Single Pole 50V dc Voltage Rating, 10A Current Rating
  • RS Stock No. 217-6363
  • Mfr. Part No. 2800865
Each
HK$360.50
Eaton IZMX40B3-P08F-1 Electronic Circuit Breaker 800A , Fixed
  • RS Stock No. 132-635
  • Mfr. Part No. 183574 IZMX40B3-P08F-1
Each
HK$91,732.19
Mersen Surge Protector
  • RS Stock No. 179-3069
  • Mfr. Part No. 83230136 / STPT23-20K275V-4P-LF
Each
HK$1,801.41
ABB F200 RCCB, 63A, 4 Pole, 30mA, 400V ac
  • RS Stock No. 176-9637
  • Mfr. Part No. 2CSF204325R1630 F204 F-63/0,03
Each
HK$10,936.45
Better World
Siemens, SENTRON MCCB 4P 125A, Breaking Capacity 36 kA
  • RS Stock No. 209-6756
  • Mfr. Part No. 3VA1112-4EF46-0AA0
Each
HK$9,114.40
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 150A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 270-083
  • Mfr. Part No. 3VA6115-5JP31-2AA0
Each
HK$19,587.30
ABB Feeder Terminal for use with Miniature Circuit Breaker
  • RS Stock No. 231-9628
  • Mfr. Part No. 2CDL200003R5001 SZ-ESK3
1 Box of 1
HK$71.31
Hager NGN MCB, 2P, 20A Curve D, 230 → 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 144-4763
  • Mfr. Part No. NGN220
Each
HK$1,127.62
Phoenix Contact Surge Protector, DIN Rail Mount
  • RS Stock No. 207-2736
  • Mfr. Part No. 2906810
Each
HK$1,223.10
Hager CDC RCCB, 40A, 2 Pole, 30mA, Type AC, 127 → 230V ac
  • RS Stock No. 597-962
  • Mfr. Part No. CDC247F
Each
HK$1,914.10
Better World
ABB Emax2 Electronic Circuit Breaker 630A 1SDA07, 3 channels
  • RS Stock No. 259-9891
  • Mfr. Part No. 1SDA070724R1
Each
HK$43,391.77
Eaton 10A F Glass Cartridge Fuse, 6.3 x 25mm
  • RS Stock No. 849-5614
  • Mfr. Part No. AGX-10
Each
HK$9.20
Better World
Schneider Electric Multi 9 MCB, 4P, 20A Curve C, 10 kA Breaking Capacity
  • RS Stock No. 219-9139
  • Mfr. Part No. M9F22420
Each
HK$2,984.40
Better World
Schneider Electric Acti 9 Acti9 iDT40 XA MCB, 1P, 10A Curve C, 230V AC, 7.5 kA Breaking Capacity
  • RS Stock No. 200-6146
  • Mfr. Part No. A9PA4610
Each
HK$877.90
Schneider Electric Resi9 MCB, 3P, 20A Curve B, 400V AC, 6000 A Breaking Capacity
  • RS Stock No. 654-653
  • Mfr. Part No. R9F23320
Each
HK$776.20
Schneider Electric, ComPacT MCCB 3P 100A, Fixed Mount
  • RS Stock No. 260-7598
  • Mfr. Part No. C11F3TM100L
Each
HK$5,447.38
Schneider Electric RCBO, 32A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type C, Acti9 Range
  • RS Stock No. 654-776
  • Mfr. Part No. A9D73632
Each
HK$3,381.80
1
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