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

2259 of 999+
Temporarily out of stock
Siemens, SENTRON MCCB 2P 80A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 147-577
  • Mfr. Part No. 3VA5180-6ED21-1AA0
Each
HK$4,217.20
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 63A, Fixed Mount
  • RS Stock No. 260-9467
  • Mfr. Part No. C10H3TM063
Each
HK$6,958.66
Temporarily out of stock
Better World
ABB, XT2L MCCB 4P 10A, Fixed Mount
  • RS Stock No. 236-6507
  • Mfr. Part No. 1SDA067965R1 XT2L 160 Ekip LSIG 10A FF
Each
HK$14,581.80
In Stock
Murrelektronik Limited MICO Circuit Breaker Bridge for use with Circuit Breakers
  • RS Stock No. 270-9600
  • Mfr. Part No. 9000-41034-0000002
Each
HK$77.80
In Stock
Better World
Schneider Electric Acti9 iDT40 RCCB, 40A, 3+N Pole, 300mA, Type A, 400V ac
  • RS Stock No. 238-3516
  • Mfr. Part No. A9Y65740
Each
HK$3,445.67
In Stock
ABB Change Over Switch Circuit Trip
  • RS Stock No. 186-3449
  • Mfr. Part No. 2CCA703040R0001
Each
HK$207.90
In Stock
Better World
Schneider Electric Multi 9 C60N MCB, 4P, 32A Curve B, 40 kA Breaking Capacity
  • RS Stock No. 214-2053
  • Mfr. Part No. M9F10432
Each
HK$2,009.13
In Stock
Eaton 2.5A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 169-9393
  • Mfr. Part No. S501-2.5-R
1 Bag of 1000
HK$1,767.20
Temporarily out of stock
Better World
Schneider Electric TeSys Thermal Circuit Breaker - GV4PEM 3 Pole 690V ac Voltage Rating, 12.5A Current Rating
  • RS Stock No. 175-1575
  • Mfr. Part No. GV4PEM12N6
Each
HK$5,918.00
Temporarily out of stock
Eaton RCCB, 10A, 2 Pole, 10mA, Type AC, 230V ac
  • RS Stock No. 227-0688
  • Mfr. Part No. 264265 PFGM-16/2/001
Each
HK$2,100.52
Temporarily out of stock
Eaton B3.0/4-PKZ4 3 Phase Busbar, 690V
  • RS Stock No. 272-2294
  • Mfr. Part No. 220222 B3.0/4-PKZ4
Each
HK$462.66
In Stock
ABB High Performance S800N MCB, 2P, 100A Curve C, 400V AC, 36 kA Breaking Capacity
  • RS Stock No. 435-572
  • Mfr. Part No. 2CCG001230R0001
Each
HK$1,207.60
In Stock
Eaton xEffect MCB, 2P, 2A Curve C, 125V DC, 10 kA Breaking Capacity
  • RS Stock No. 922-7197
  • Mfr. Part No. 279134 FAZ-C2/2-DC
Each
HK$1,295.40
Temporarily out of stock
Eaton 16A NH Fuse, NH000, 690V ac
  • RS Stock No. 181-8722
  • Mfr. Part No. 16NHM000B-690
Each
HK$90.95
In Stock
Lovato ModuLo P1MB MCB, 1P, 4A Curve B, 230V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 825-5542
  • Mfr. Part No. P1MB1PB04
Each
HK$241.22
Temporarily out of stock
Phoenix Contact 1 Phase Surge Protector, 2kV, DIN Rail Mount
  • RS Stock No. 890-3702
  • Mfr. Part No. 2905415
Each
HK$5,030.80
In Stock
Better World
Siemens SENTRON 5SL6 MCB, 3+N, 32A Curve C
  • RS Stock No. 216-4326
  • Mfr. Part No. 5SL6432-7
Each
HK$1,450.60
Temporarily out of stock
Eaton MCB, 2P, 8A Curve B, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 244-000
  • Mfr. Part No. 101290 PLI-B8/2
Each
HK$659.42
Temporarily out of stock
Schneider Electric IKQ RCD, 100A, 4 Pole, 300mA, 400V ac
  • RS Stock No. 339-380
  • Mfr. Part No. SED100304S
Each
HK$4,831.33
In Stock
Sensata Airpax Airpax Thermal Circuit Breaker - IUGN1 Single Pole Panel Mount, 30A Current Rating
  • RS Stock No. 275-0277
  • Mfr. Part No. IUGN1-1-72-30.0
1 Box of 5
HK$2,796.10
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