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

85 of 999+
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 630A, Fixed Mount
  • RS Stock No. 260-8220
  • Mfr. Part No. C63L4
Each
HK$57,002.14
Temporarily out of stock
400A Tag Fuse, 225 x 225mm, 690V
  • RS Stock No. 262-036
  • Mfr. Part No. EBH223TTM1
Each
HK$3,687.70
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1kA 1SDA07, 4 channels
  • RS Stock No. 259-4640
  • Mfr. Part No. 1SDA072913R1
Each
HK$76,461.60
Temporarily out of stock
Better World
Schneider Electric Acti 9 A9F9 MCB, 1P, 32A, Type Z, 230V AC, 72V DC, 20 kA, 15 kA Breaking Capacity
  • RS Stock No. 211-2488
  • Mfr. Part No. A9F92132
Each
HK$464.96
Temporarily out of stock
ABB RCBO, 6A Current Rating, 2P Poles, 100mA Trip Sensitivity, System Pro M Compact Range
  • RS Stock No. 201-6904
  • Mfr. Part No. 2CSR255080R2064
Each
HK$1,414.69
Temporarily out of stock
Eaton 16A Cartridge Fuse, 51 x 292mm
  • RS Stock No. 260-756
  • Mfr. Part No. 7.2TDLSJ16
1 Pack of 3
HK$6,118.80
Temporarily out of stock
Siemens SENTRON 5SY7 MCB, 3P, 8A Curve D, 400V AC, 60V DC, 30 kA Breaking Capacity
  • RS Stock No. 610-530
  • Mfr. Part No. 5SY7308-8
Each
HK$1,895.69
Temporarily out of stock
Schneider Electric, ComPacT NSX Circuit breaker 4P 25A, Breaking Capacity 85 KA, Fixed Mount
  • RS Stock No. 119-468
  • Mfr. Part No. C11F44V025B
Each
HK$25,747.43
In Stock
ETA Thermal Circuit Breaker - 1180 Single Pole 250V Voltage Rating DIN Rail Mount, 0.5A Current Rating
  • RS Stock No. 458-8661
  • Mfr. Part No. 1180-01-0.5A
Each
HK$134.60
Temporarily out of stock
30A NH Fuse, 1.75 x 0.75 x 1.88in, 600V ac
  • RS Stock No. 262-587
  • Mfr. Part No. TCF30RN
Each
HK$748.70
In Stock
Schurter PC Board Non Resettable Fuse, Radial 1.6A, 250V ac
  • RS Stock No. 173-9798
  • Mfr. Part No. 0034.6617
Each (In a Bag of 100)
HK$2.215
Temporarily out of stock
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 3P 400A, Breaking Capacity 5 kA, Withdrawable
  • RS Stock No. 231-345
  • Mfr. Part No. 113525 NZMN3-S400-AVE
Each
HK$23,586.58
Temporarily out of stock
400A Tag Fuse, 190 x 225mm, 690V
  • RS Stock No. 262-033
  • Mfr. Part No. EBH213TTM1
Each
HK$3,553.80
Temporarily out of stock
Better World
Siemens, Sentron MCCB Molded Case Circuit Breaker 4P 40A, Breaking Capacity 2.5 kA
  • RS Stock No. 245-760
  • Mfr. Part No. 3VA6140-6KT41-0AA0
Each
HK$23,396.80
Temporarily out of stock
Better World
Schneider Electric, ComPact MCCB, Fixed Mount
  • RS Stock No. 221-0942
  • Mfr. Part No. LV429393
Each
HK$1,296.97
Temporarily out of stock
HENSEL ENYMOD Distribution Board
  • RS Stock No. 117-581
  • Mfr. Part No. Mi EP 03
Each
HK$731.30
Temporarily out of stock
Eaton 25A Cartridge Fuse, 50 x 442mm
  • RS Stock No. 255-491
  • Mfr. Part No. 24TDMEJ25
Each
HK$1,823.30
In Stock
Better World
Schneider Electric TeSys Thermal Circuit Breaker - GV4PB 3 Pole 690V ac Voltage Rating, 115A Current Rating
  • RS Stock No. 209-5323
  • Mfr. Part No. GV4PB115N
Each
HK$5,172.00
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 800A 1SDA07, 4 channels
  • RS Stock No. 259-3562
  • Mfr. Part No. 1SDA071540R1
Each
HK$110,281.65
Temporarily out of stock
Siemens SENTRON Option Plug
  • RS Stock No. 277-0903
  • Mfr. Part No. 3WA9111-0EB08
Each
HK$1,649.20
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