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

82 of 999+
In Stock
Eaton 100A Rail Mount Fuse Holder for 22 x 58mm Fuse, 3P, 690V ac
  • RS Stock No. 703-8572
  • Mfr. Part No. CH223B
Each
HK$955.00
In Stock
Schneider Electric Acti9 SE10 MCB Mini Circuit Breaker, 1P, 20A Curve C, 415V AC, 10000 A Breaking Capacity
  • RS Stock No. 336-608
  • Mfr. Part No. SE10C120
Each
HK$247.25
Temporarily out of stock
Eaton 15A Cartridge Fuse, 1.5 x 0.41in
  • RS Stock No. 229-121
  • Mfr. Part No. FNQ-15
1 Pack of 10
HK$5,383.10
Temporarily out of stock
Schneider Electric Busbar Tap-Off Unit, 680mm, 630A, Canalis Series
  • RS Stock No. 354-466
  • Mfr. Part No. KH063SD9502
Each
HK$87,313.00
Temporarily out of stock
Schneider Electric RCBO, 16A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type C, Acti9 Range
  • RS Stock No. 654-791
  • Mfr. Part No. A9DC4616
Each
HK$3,998.40
Temporarily out of stock
Siemens 100A Cartridge Fuse, 22 X 58mm
  • RS Stock No. 665-093
  • Mfr. Part No. 3NC2200-5
1 Pack of 5
HK$1,714.60
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
Temporarily out of stock
Lovato 32A Rail Mount Fuse Holder for 10 x 38mm Fuse, 1P, 690V ac
  • RS Stock No. 216-8276
  • Mfr. Part No. FB01D1P
Each
HK$86.06
Temporarily out of stock
Schneider Electric, PowerPact MCCB 3P 15A, Breaking Capacity 65 kA, Clip-On
  • RS Stock No. 428-850
  • Mfr. Part No. BJF36015
Each
HK$11,562.82
In Stock
Better World
Schneider Electric RCBO, 10A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Acti 9 Range
  • RS Stock No. 790-9207
  • Mfr. Part No. A9D31810
Each
HK$1,388.30
Temporarily out of stock
Eaton 250A NH Fuse, NH1, 500V
  • RS Stock No. 703-8715P
  • Mfr. Part No. 250NHG1B
Each (Supplied in a Box)
HK$57.80
Temporarily out of stock
Siemens 20A Cartridge Fuse, 22.2 x 58mm
  • RS Stock No. 627-109
  • Mfr. Part No. 3NW8207-1
1 Pack of 10
HK$958.70
Temporarily out of stock
Schneider Electric TeSys Spreader for use with Circuit Breaker
  • RS Stock No. 207-222
  • Mfr. Part No. GV7AC03
Each
HK$738.60
Temporarily out of stock
Schneider Electric Acti9 3 Phase Distribution Board, 24 Way, 250 A
  • RS Stock No. 244-975
  • Mfr. Part No. SE72B250
Each
HK$11,363.71
Temporarily out of stock
Siemens SENTRON 5SY8 MCB, 1P, 1A Curve D, 400V AC, 60V DC, 70 kA Breaking Capacity
  • RS Stock No. 610-597
  • Mfr. Part No. 5SY8101-8
Each
HK$537.58
In Stock
Eaton 32A gG/gL Cartridge Fuse, 14.x 51mm
  • RS Stock No. 228-669
  • Mfr. Part No. C14G32
1 Pack of 10
HK$199.50
Temporarily out of stock
ABB S801C MCB, 1P, 25A Curve K, 400V AC, 25 kA Breaking Capacity
  • RS Stock No. 140-311
  • Mfr. Part No. 2CCS881001R0517
Each
HK$1,290.87
Temporarily out of stock
Schneider Electric ComPact Auxiliary Contact for use with NS630b to NS3200
  • RS Stock No. 275-6652
  • Mfr. Part No. 33012
Each
HK$532.82
Temporarily out of stock
Eaton 100A Tag Fuse, 33 x 60mm, 500V
  • RS Stock No. 228-897
  • Mfr. Part No. 100D125Q
1 Pack of 3
HK$587.20
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 500A, Fixed Mount
  • RS Stock No. 260-8202
  • Mfr. Part No. C63F3TM500D
Each
HK$34,097.28
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