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

47266 Products showing for Fuses & Circuit Breakers

28 of 999+
Temporarily out of stock
Better World
ABB S200C MCB, 2P, 20A Curve C, 240V AC, 6 kA Breaking Capacity
  • RS Stock No. 212-1613
  • Mfr. Part No. 2CDS251281R0204
Each
HK$436.30
Temporarily out of stock
Mersen 25A FF Cartridge Fuse, 14 x 51mm
  • RS Stock No. 136-0588
  • Mfr. Part No. G1017204 / FR14GR69V25
Each
HK$169.70
In Stock
RS PRO 10A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 414-061
Each (In a Pack of 10)
HK$11.82
In Stock
Eaton 32A Rail Mount Fuse Holder for F1 Fuse, 1P, 550V ac
  • RS Stock No. 418-495
  • Mfr. Part No. 32NNSF
Each
HK$115.60
In Stock
Eaton 6A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 703-8374
  • Mfr. Part No. C10G6
Each (In a Pack of 10)
HK$19.53
In Stock
Legrand MCB, 1P, 16A
  • RS Stock No. 293-1417
  • Mfr. Part No. 0 058 11
Each
HK$121.30
Being discontinued
Mersen 20A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 270-3146
  • Mfr. Part No. Y233448
Each (In a Box of 10)
HK$5.63
Temporarily out of stock
RCBO, 32A Current Rating, 1+N Poles, 100mA Trip Sensitivity, Type C, xEffect Range
  • RS Stock No. 252-766
  • Mfr. Part No. 193525 FRBmM-C32/1N/01-F
Each
HK$1,953.15
In Stock
ETA Thermal Circuit Breaker - 3600 Single Pole 250V Voltage Rating Panel Mount, 6A Current Rating
  • RS Stock No. 729-2843
  • Mfr. Part No. 3600-P10-Si-6A
Each
HK$812.20
In Stock
Eaton 20A British Standard Fuse, A1, 550V ac, 42.5mm
  • RS Stock No. 139-883
  • Mfr. Part No. NITD20M25
Each (In a Pack of 5)
HK$27.84
Temporarily out of stock
ABB Cover for use with Three-Pole XT3
  • RS Stock No. 192-0929
  • Mfr. Part No. 1SDA066668R1
Each
HK$424.35
Temporarily out of stock
ABB SMISSLINE Busbar for Smissline TP
  • RS Stock No. 246-2333
  • Mfr. Part No. 2CCF800245R0001
Each
HK$154.77
Temporarily out of stock
Littelfuse 50A Blade Fuse Car Fuse, 32V ac/dc
  • RS Stock No. 878-3249
  • Mfr. Part No. 0MID050.X
Each
HK$51.60
Temporarily out of stock
Better World
Siemens, Sentron MCCB Molded Case Circuit Breaker 4P 40A, Breaking Capacity 2.5 kA
  • RS Stock No. 245-513
  • Mfr. Part No. 3VA6140-7HM41-0AA0
Each
HK$10,761.30
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 1.25kA Ekip G Hi-Touch LSIG, 3 channels
  • RS Stock No. 259-3107
  • Mfr. Part No. 1SDA070960R1
Each
HK$94,923.82
Temporarily out of stock
Better World
Siemens SENTRON 5SV3xxx RCCB, 80A, 4 Pole, 500mA, Type A, 400V ac
  • RS Stock No. 241-4455
  • Mfr. Part No. 5SV3747-6
Each
HK$4,912.30
Temporarily out of stock
ABB S802S RCCB, 100A, 2 Pole, 690V
  • RS Stock No. 140-831
  • Mfr. Part No. 2CCS802901R0639
Each
HK$13,696.94
Limited stock
Limitor Thermal Fuse +80°C 2.5 A, 250V ac
  • RS Stock No. 176-9148
  • Mfr. Part No. P82 80 05100
Each
HK$50.60
In Stock
Siemens 100A NH Fuse, NH000, 500V ac
  • RS Stock No. 396-102
  • Mfr. Part No. 3NA3830
Each (In a Pack of 3)
HK$247.233
Temporarily out of stock
ABB Cover for use with Four-Pole XT1
  • RS Stock No. 192-0931
  • Mfr. Part No. 1SDA066656R1
Each
HK$382.07
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