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

2243 of 999+
ABB System Pro M Compact S300P MCB, 3+N, 8A, Type Z, 415V AC, 25 kA Breaking Capacity
  • RS Stock No. 203-799
  • Mfr. Part No. 2CDS383103R0408
Each
HK$5,604.22
Lovato RCBO, 32A Current Rating, 1P + N Poles, 30mA Trip Sensitivity, Type A, P1RE1NC Range
  • RS Stock No. 276-5685
  • Mfr. Part No. P1RE1NC32A030
Each
HK$1,455.85
Mersen 35A Tag Fuse, 78 x 52 x 21mm, 500V ac
  • RS Stock No. 244-8523
  • Mfr. Part No. C211947C
1 Box of 3
HK$123.92
Siemens SENTRON Connection Kit
  • RS Stock No. 277-0844
  • Mfr. Part No. 3WA9111-0AX31
Each
HK$2,104.80
Better World
Schneider Electric Acti 9 iC60H MCB, 1P, 25A Curve B, 230V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 776-2095
  • Mfr. Part No. A9F06125
Each
HK$171.01
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-4031
  • Mfr. Part No. 3VA2110-8JP32-0AA0
Each
HK$18,096.90
Mersen 8A Glass Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 136-0535
  • Mfr. Part No. HP10M8
Each (In a Box of 10)
HK$92.551
Better World
Schneider Electric Multi 9 C60BP MCB, 3P, 8A Curve D, 10 kA Breaking Capacity
  • RS Stock No. 214-2089
  • Mfr. Part No. M9F43308
Each
HK$2,229.40
Eaton PKE Electronic Circuit Breaker 250A , 3 channels
  • RS Stock No. 121-599
  • Mfr. Part No. 155416 NZML3-VE250-AVE
Each
HK$36,251.39
RS PRO 2.5A T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 668-6073
Each (In a Pack of 10)
HK$4.22
Eaton, Eaton Moeller series NZM MCCB Molded Case Circuit Breaker 3P 100A, Breaking Capacity 5 kA, Plug In
  • RS Stock No. 240-175
  • Mfr. Part No. 147390 NZMN2-VE100-BT
Each
HK$9,802.94
Lovato MCB, 3P, 3A Curve C, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 188-1654
  • Mfr. Part No. P1MBUH3PC03
Each
HK$1,498.20
Siemens 230V ac Circuit Trip
  • RS Stock No. 223-7619
  • Mfr. Part No. 5TT4405-0
Each
HK$455.30
Better World
ABB, Tmax XT MCCB 3P 52A, Fixed Mount
  • RS Stock No. 236-6491
  • Mfr. Part No. 1SDA067945R1 XT2L 160 Ekip M 52A FF
Each
HK$10,661.00
Better World
Siemens, SENTRON MCCB 3P 25A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 874-4398
  • Mfr. Part No. 3VA2125-5HL36-0AA0
Each
HK$5,329.60
Eaton xEffect FAZ MCB, 2P, 1.5A Curve C, 415V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 240-574
  • Mfr. Part No. 102199 FAZ-C1,5/2-RT
Each
HK$1,478.81
Better World
Schneider Electric Nsx400...630, Nsx400...630 Dc, Powerpact Multistandard Padlock Device for use with Compact Nsx
  • RS Stock No. 221-1273
  • Mfr. Part No. LV432631
Each
HK$423.70
Lovato ModuLo P2MB MCB, 3P, 100A Curve C, 230V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 825-6163
  • Mfr. Part No. P2MB3PC100
Each
HK$1,217.20
Mersen 6A Slow-Blow Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 247-2927
  • Mfr. Part No. W085257
1 Box of 10
HK$1,931.30
Eaton 63A NH Fuse, NH00, 500V
  • RS Stock No. 181-8785
  • Mfr. Part No. 63NHG00B
Each
HK$60.66
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