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

30 of 999+
Littelfuse 0.9A Resettable Fuse, 72V
  • RS Stock No. 517-6679P
  • Mfr. Part No. RXEF090
Each (Supplied in a Bag)
HK$2.81
ABB Tmax XT Trip Unit for use with Tmax XT
  • RS Stock No. 236-7322
  • Mfr. Part No. 1SDA067501R1 Ekip LS/I In=160A XT4 3p
Each
HK$4,973.71
Legrand 8A Ceramic Cartridge Fuse, 8 x 32mm
  • RS Stock No. 266-3083
  • Mfr. Part No. 0 123 08
1 Box of 10
HK$227.19
Schneider Electric, ComPacT NSX MCCB 4P 100A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 254-6287
  • Mfr. Part No. C10F4
Each
HK$3,459.20
Littelfuse Fuse Puller Fuse Kit
  • RS Stock No. 820-7274
  • Mfr. Part No. 00940480Z
Each
HK$491.80
Eaton 2A Tag Fuse, 12 x 47mm, 240V
  • RS Stock No. 228-913
  • Mfr. Part No. SSD2
1 Pack of 20
HK$1,447.30
Schurter CSO Silver Plated Copper Alloy PCB Mount Fuse Clip for 10.3 x 38mm Cartridge Fuse
  • RS Stock No. 173-8114
  • Mfr. Part No. 0751.0506
1 Box of 1000
HK$6,721.80
ETA Thermal Circuit Breaker - 3600 Single Pole 250V Voltage Rating Panel Mount, 8A Current Rating
  • RS Stock No. 729-2852
  • Mfr. Part No. 3600-P10-Si-8A
Each
HK$817.60
Better World
Siemens 5SV3 RCCB, 40A, 4 Pole, 100mA, Type A
  • RS Stock No. 124-7736
  • Mfr. Part No. 5SV3444-6
Each
HK$1,287.90
Phoenix Contact CLIPLINE Electronic Circuit breaker 2A 24V PTCB E1, 1 channels
  • RS Stock No. 220-5802
  • Mfr. Part No. 1135749
Each
HK$358.60
Siemens SENTRON Cover Frame for use with 3VA51
  • RS Stock No. 162-024
  • Mfr. Part No. 3VA9033-0SB10
Each
HK$337.30
Siemens SENTRON 3VA9 Mounting Kit for use with 3VA2 100/160/250
  • RS Stock No. 218-1800
  • Mfr. Part No. 3VA9126-0SS10
Each
HK$189.80
Littelfuse 30A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 878-3567
  • Mfr. Part No. 0326030.HXP
Each (In a Pack of 50)
HK$9.338
Better World
Siemens RCCB, 63A, 4 Pole, 30mA, Type A, 400V
  • RS Stock No. 269-9763
  • Mfr. Part No. 5SV3346-6KK60
Each
HK$6,758.90
Eaton xE?ect - FRCmM-NA RCCB, 25A, 2 Pole, 30mA, Type A, 240/415V ac
  • RS Stock No. 120-287
  • Mfr. Part No. 167113 FRCMM-25/2/003-A-NA
Each
HK$1,834.20
Better World
Siemens 3VA92 RCD, 250A, 3 Pole, Type A
  • RS Stock No. 210-9326
  • Mfr. Part No. 3VA9213-0RL20
Each
HK$12,834.70
Better World
Siemens 5SV3 RCCB, 25A, 2 Pole, 30mA, Type A
  • RS Stock No. 124-7728
  • Mfr. Part No. 5SV3312-6KK12
Each
HK$643.30
Better World
Siemens 5SV3321 RCCB, 16A, 2 Pole, 30mA, Type B, 230V ac
  • RS Stock No. 231-8373
  • Mfr. Part No. 5SV3321-4
Each
HK$2,698.90
Better World
Siemens 5SV3 RCCB, 40A, 2 Pole, 300mA, Type A
  • RS Stock No. 124-7738
  • Mfr. Part No. 5SV3614-6
Each
HK$789.20
Better World
Siemens 3VA9 RCD, 160A, 3 Pole, Type A
  • RS Stock No. 210-3513
  • Mfr. Part No. 3VA9113-0RL20
Each
HK$11,672.80
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