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

142 of 999+
Temporarily out of stock
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 4P 160A, Breaking Capacity 3 kA, Fixed Mount
  • RS Stock No. 251-433
  • Mfr. Part No. 193302 NZMN2-4-VX160-T
Each
HK$19,761.50
In Stock
Better World
Schneider Electric Surge Protector, 20kA, DIN Rail Mount
  • RS Stock No. 776-3890
  • Mfr. Part No. A9L16294
Each
HK$10,152.25
Temporarily out of stock
Schneider Electric Multi9 Padlock Device for use with Circuit Breaker
  • RS Stock No. 212-132
  • Mfr. Part No. MGN26381
Each
HK$470.98
Temporarily out of stock
ABB System Pro M Compact S200 M UC MCB, 1P, 15A, Type Z, 230V AC, 220V DC, 10 kA Breaking Capacity
  • RS Stock No. 200-034
  • Mfr. Part No. 2CDS271061R0458
Each
HK$1,308.19
In Stock
Schurter SMD Non Resettable Fuse 3A, 125V ac/dc
  • RS Stock No. 173-7876
  • Mfr. Part No. 3410.0037.01
Each (In a Bag of 100)
HK$21.813
Temporarily out of stock
Eaton 10A Cartridge Fuse, 50 x 442mm
  • RS Stock No. 255-490
  • Mfr. Part No. 24TDMEJ10
Each
HK$1,555.40
In Stock
ETA Thermal Circuit Breaker - 1616 Single Pole 32V Voltage Rating, 5A Current Rating
  • RS Stock No. 729-2726
  • Mfr. Part No. 1616-21-5A
Each
HK$241.86
In Stock
Wickmann Inline Fuse Holder
  • RS Stock No. 174-0755
  • Mfr. Part No. 01500079Z
Each (In a Pack of 5)
HK$21.76
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 2P 25A, Breaking Capacity 25 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-545
  • Mfr. Part No. 3VA5125-6ED21-1AA0
Each
HK$2,362.90
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 80A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 209-5041
  • Mfr. Part No. 3VA1180-3EF46-0AA0
Each
HK$4,894.20
In Stock
Schneider Electric Resi9 R9F23 Circuit Breaker, 1P, 16A Curve B, 230V AC, 6000 A Breaking Capacity
  • RS Stock No. 655-494
  • Mfr. Part No. R9F23116
Each
HK$98.09
Temporarily out of stock
SENTRON for use with 3VA57/3VA58/3VA59 3VA67/3VA68/3VA69 Series
  • RS Stock No. 263-847
  • Mfr. Part No. 3VA9877-0CB10
Each
HK$1,923.80
Temporarily out of stock
Better World
Siemens Sentron 5SY4 MCB, 4P, 50A Curve C, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 124-3208
  • Mfr. Part No. 5SY4450-7
Each
HK$2,623.60
Temporarily out of stock
Better World
Siemens SENTRON 5SY5 MCB, 2P, 63A Curve C, 400V AC, 440V DC, 10 kA Breaking Capacity
  • RS Stock No. 209-6013
  • Mfr. Part No. 5SY5263-7
Each
HK$2,422.90
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 20A, Breaking Capacity 55 kA
  • RS Stock No. 210-1639
  • Mfr. Part No. 3VA1120-5EF36-0AA0
Each
HK$4,047.70
In Stock
Selco Thermal Fuse +216°C 10 A, 250V ac
  • RS Stock No. 111-7811
  • Mfr. Part No. SWTC-421-3535
Each (In a Pack of 10)
HK$14.27
Temporarily out of stock
Better World
Schneider Electric Acti 9 iC60H MCB, 4P, 3A Curve C, 440V AC, 250V DC, 10 kA Breaking Capacity
  • RS Stock No. 776-2398
  • Mfr. Part No. A9F07403
Each
HK$1,545.30
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 63A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 347-089
  • Mfr. Part No. C10N6TM063
Each
HK$10,564.48
Limited stock
Limitor Thermal Fuse +102°C 5 A, 250V ac
  • RS Stock No. 124-5057
  • Mfr. Part No. A1-5AF
Each (In a Pack of 5)
HK$8.26
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.6kA Ekip Hi-Touch LSI, 4 channels
  • RS Stock No. 259-4694
  • Mfr. Part No. 1SDA072969R1
Each
HK$108,320.75
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