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

63 of 999+
In Stock
RS PRO 15A Blue Blade Car Fuse, 32V dc
  • RS Stock No. 563-570
Each (In a Pack of 10)
HK$6.71
In Stock
ABB System Pro M Compact S200L MCB, 2P, 16A Curve C, 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 183-3622
  • Mfr. Part No. 2CDS242701R0164
Each
HK$357.10
In Stock
Eaton 40A Orange Blade Car Fuse, 32V dc No
  • RS Stock No. 852-7358
  • Mfr. Part No. ATC-40
Each
HK$11.90
In Stock
Better World
Siemens Sentron 5SY6 MCB, 2P, 6A Curve C, 400V AC, 72V DC, 6 kA Breaking Capacity
  • RS Stock No. 196-3628
  • Mfr. Part No. 5SY6206-7
Each
HK$500.70
In Stock
Littelfuse 10A PCB Mount Fuse Holder for 5 x 20mm Fuse, 250V ac
  • RS Stock No. 787-4300
  • Mfr. Part No. 65600001009
Each (In a Pack of 5)
HK$11.12
In Stock
Mersen 32A Rail Mount Fuse Holder for 10 x 38mm Fuse, 1P+N, 690V ac
  • RS Stock No. 182-0347
  • Mfr. Part No. H215655
Each
HK$152.10
In Stock
Wickmann 6.3A PCB Mount Fuse Holder, 250V ac
  • RS Stock No. 110-7900
  • Mfr. Part No. 56000001009
Each (In a Pack of 10)
HK$4.15
In Stock
Bourns 0.05A Resettable Fuse, 220V
  • RS Stock No. 167-4670
  • Mfr. Part No. CMF-RL50A-0
Each (In a Box of 300)
HK$2.957
In Stock
brennenstuhl 1 Phase Surge Protector, 16A, 230 V, Plug-On Mount
  • RS Stock No. 270-2252
  • Mfr. Part No. 1506951
Each
HK$168.50
In Stock
Siemens SENTRON Nut Keeper Kit for use with 3VA5
  • RS Stock No. 269-7149
  • Mfr. Part No. 3VA9233-0QA00
Each (In a Pack of 3)
HK$202.467
In Stock
Siemens 3VA9111 Cover for use with 3VA1 100/160
  • RS Stock No. 203-3949
  • Mfr. Part No. 3VA9111-0WD30
Each
HK$114.30
Last RS stock
Eaton xEffect MCB, 2P, 6A Curve C, 230 → 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 769-4719
  • Mfr. Part No. 239100 FAZ6-C6/2
Each
HK$489.40
In Stock
Eaton 125A Neutral Link, 22mm x 58mm
  • RS Stock No. 703-8526
  • Mfr. Part No. C22NL
Each (In a Pack of 10)
HK$47.85
In Stock
Better World
Schneider Electric, Acti 9, 63A, Energy Sensor, 1VA, Wireless
  • RS Stock No. 134-8660
  • Mfr. Part No. A9MEM1522
Each
HK$1,277.90
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 50A, Breaking Capacity 25 kA
  • RS Stock No. 209-6826
  • Mfr. Part No. 3VA1150-3ED42-0AA0
Each
HK$3,653.80
In Stock
Eaton xEffect MCB, 1+N, 4A Curve C, 240V AC, 48V DC, 10 kA Breaking Capacity
  • RS Stock No. 922-7080
  • Mfr. Part No. 278666 FAZ-C4/1N
Each
HK$570.90
In Stock
Better World
Siemens Sentron 5SY4 MCB, 1P, 6A Curve D, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 772-1259
  • Mfr. Part No. 5SY4106-8
Each
HK$547.40
In Stock
RS PRO 25A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 247-3999
Each (In a Pack of 10)
HK$8.15
Temporarily out of stock
Eaton MCB, 1P, 6A Curve B, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 243-501
  • Mfr. Part No. 101247 PLI-B6/1
Each
HK$174.85
In Stock
Eaton xEffect MCB, 1+N, 6A Curve B
  • RS Stock No. 230-0921
  • Mfr. Part No. 239044 FAZ6-B6/1N
Each
HK$194.40
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