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

86 of 999+
Schneider Electric, PowerPact MCCB 3P 600A, Breaking Capacity 18 kA, DIN Rail Mount
  • RS Stock No. 341-448
  • Mfr. Part No. NLJL36600U31X
Each
HK$93,504.87
Eaton 25A Bottle Fuse, 500V ac
  • RS Stock No. 228-721
  • Mfr. Part No. 25D27R FUSE-D2 25A F GR 500VAC E27
1 Pack of 5
HK$355.50
Eaton xEffect MCB, 2P, 6A Curve C, 230 → 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 769-4700
  • Mfr. Part No. 239059 FAZ6-C6/1N
Each
HK$579.60
Europa RCBO, 10A Current Rating, 1P Poles, 30mA Trip Sensitivity, Type AC, EUC7R Range
  • RS Stock No. 210-4737
  • Mfr. Part No. EUC7RC.10/1CA
Each
HK$632.26
Eaton 50A Cartridge Fuse, 50 x 442mm
  • RS Stock No. 254-753
  • Mfr. Part No. 24TDMEJ50
Each
HK$2,503.10
Siemens SENTRON Mounting Frame for use with 3VA1 100/160, 3VA9113-0RL20
  • RS Stock No. 210-9277
  • Mfr. Part No. 3VA9053-0SB10
Each
HK$185.10
Hager NEN MCB, 4P, 50A Curve B, 240 → 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 144-4704
  • Mfr. Part No. NEN450
Each
HK$4,406.44
Better World
Schneider Electric Flexible Elbow Busbar Trunking, 63A, Canalis KN Series
  • RS Stock No. 211-0419
  • Mfr. Part No. KNA63DL4
Each
HK$2,081.50
Eaton Panel Mount Fuse Clip for 6.35 x 55.7mm Fuse Clip Fuse
  • RS Stock No. 182-1488
  • Mfr. Part No. TI600
Each
HK$948.30
ABB System Pro M Compact S200M MCB, 1P, 500mA Curve D, 230/400V AC, 72V DC, 15 kA Breaking Capacity
  • RS Stock No. 200-971
  • Mfr. Part No. 2CDS271001R0981
Each
HK$931.40
Schneider Electric Busbar Tap-Off Unit, 278 → 632mm, 250A, Canalis Series
  • RS Stock No. 335-076
  • Mfr. Part No. KSB250SM428
Each
HK$19,456.80
Socomec 32A Cartridge Fuse, 10 x 38mm
  • RS Stock No. 122-5269
  • Mfr. Part No. 60120032
Each (In a Pack of 10)
HK$10.23
Bourns Surface Mount Fuse 7A, 48V dc
  • RS Stock No. 245-9232P
  • Mfr. Part No. SF-1206F700M-2
Each (Supplied on a Reel)
HK$5.34
Bourns Surface Mount Fuse 3A, 50 V dc, 63 V dc
  • RS Stock No. 245-9204P
  • Mfr. Part No. SF-0603SPA300R-2
Each (Supplied on a Reel)
HK$8.99
Siemens SENTRON Busbar
  • RS Stock No. 266-505
  • Mfr. Part No. 8US1313-4AM04
Each
HK$2,841.10
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
Littelfuse SMD Non Resettable Fuse 500mA, 125V ac
  • RS Stock No. 769-3725
  • Mfr. Part No. 0452.500NRL
Each (In a Pack of 10)
HK$9.79
Siemens 1A Cartridge Fuse, 10 X 38mm
  • RS Stock No. 665-113
  • Mfr. Part No. 3NW6000-1
1 Pack of 10
HK$360.50
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
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
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