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

153 of 999+
Siemens, SENTRON MCCB 4P 150A, Breaking Capacity 7 kA, Fixed Mount
  • RS Stock No. 147-965
  • Mfr. Part No. 3VA5215-5GD41-2AA0
Each
HK$17,511.10
Better World
Schneider Electric Acti 9 iC60H MCB, 3P, 63A Curve B, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3243
  • Mfr. Part No. A9F53363
Each
HK$1,031.10
RS PRO 2A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 610-9771
Each (In a Pack of 10)
HK$3.79
Schurter 6.3A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 269-3876
  • Mfr. Part No. 8020.5076
Each
HK$5.80
ETA Thermal Circuit Breaker - 2210 Single Pole 277, 480V Voltage Rating DIN Rail Mount, 1.5A Current Rating
  • RS Stock No. 282-8759
  • Mfr. Part No. 2210-T210-K0M1-H121-1.5A
Each
HK$426.10
Schurter Surface Mount Fuse 1A, 250V ac
  • RS Stock No. 270-7926
  • Mfr. Part No. 0001.2704.11
Each
HK$4.10
Eaton xEffect MCB, 1+N, 3A Curve C
  • RS Stock No. 230-0972
  • Mfr. Part No. 239057 FAZ6-C3/1N
Each
HK$360.80
Better World
Siemens Sentron 5SV6 MCB, 2P, 10A, 230V AC, 6 kA Breaking Capacity
  • RS Stock No. 209-7509
  • Mfr. Part No. 5SV6016-6GV10
Each (In a Pack of 12)
HK$1,553.933
Better World
ABB S200C MCB, 2P, 16A Curve C, 415V AC, 6 kA Breaking Capacity
  • RS Stock No. 212-1625
  • Mfr. Part No. 2CDS252280R0164
Each
HK$373.80
Schneider Electric EasyPact Electronic Circuit Breaker 32A, Fixed
  • RS Stock No. 122-536
  • Mfr. Part No. LV510722
Each
HK$3,759.00
Littelfuse 1.5A Resettable Fuse, 6V dc
  • RS Stock No. 624-3130
  • Mfr. Part No. NANOSMDC150F-2
Each (In a Pack of 10)
HK$2.69
Mersen 25A Rail Mount Fuse Holder for 8 x 31mm Fuse, 3P, 400V ac
  • RS Stock No. 189-5329
  • Mfr. Part No. M1062680 / CMC83
Each
HK$188.92
ABB RCBO, 6A Current Rating, 2P Poles, 30mA Trip Sensitivity
  • RS Stock No. 231-9921
  • Mfr. Part No. 2CSR255080R1064 DS201 C6 AC30
1 Box of 1
HK$1,443.00
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 4P 100A, Breaking Capacity 3 kA, Fixed Mount
  • RS Stock No. 251-849
  • Mfr. Part No. 193359 NZMN2-4-AX100
Each
HK$9,716.60
Siemens SENTRON Long Rear Connection for use with 3VA5/6 400/600
  • RS Stock No. 269-7208
  • Mfr. Part No. 3VA9474-0QE00
Each (In a Pack of 4)
HK$470.825
Better World
Schneider Electric Multi 9 C60BP MCB, 3P, 3A Curve C, 440V AC, 15 kA Breaking Capacity
  • RS Stock No. 211-2425
  • Mfr. Part No. M9F42303
Each
HK$2,377.20
Eaton xEffect FAZ MCB, 1P, 25A Curve D, 240V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 247-122
  • Mfr. Part No. 102112 FAZ-D25/1-NA
Each
HK$622.22
Schneider Electric Resi9 Two Phase Distribution Board, 90 A
  • RS Stock No. 276-8952
  • Mfr. Part No. R9H13403
Each
HK$771.54
Phoenix Contact Thermal Circuit Breaker - TMC M1 Single Pole 65 V dc, 250V ac Voltage Rating DIN Rail Mount, 3A
  • RS Stock No. 801-7034
  • Mfr. Part No. 0914471
Each
HK$653.80
Eaton 6A DII Diazed Fuse, gG, 500V ac
  • RS Stock No. 181-8534
  • Mfr. Part No. 6D27
1 Box of 25
HK$3,663.40
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