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

133 of 999+
Temporarily out of stock
Schneider Electric Acti9 A9N1 MCB, 1P, 100A Curve B, 230-400V AC, 144V DC, 4.5 kA Breaking Capacity
  • RS Stock No. 212-214
  • Mfr. Part No. A9N18403
Each
HK$1,013.33
In Stock
Socomec 32A Fuse Holder for 10 x 38mm Fuse, 1P, 1kV dc
  • RS Stock No. 252-3750
  • Mfr. Part No. 57PV0001
Each (In a Pack of 12)
HK$60.058
Temporarily out of stock
Schneider Electric, PowerPact MCCB 3P 600A, Breaking Capacity 18 kA, DIN Rail Mount
  • RS Stock No. 341-453
  • Mfr. Part No. NLLL36600U31X
Each
HK$130,712.97
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 630A, Fixed Mount
  • RS Stock No. 260-8219
  • Mfr. Part No. C63L3
Each
HK$43,290.43
Temporarily out of stock
ABB F200 RCCB, 40A, 2 Pole, 30mA, Type AC, 230V ac
  • RS Stock No. 537-7361
  • Mfr. Part No. 2CSF202001R1400 F202 AC-40/0,03
Each
HK$859.40
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 160A 3VA2, 4 channels
  • RS Stock No. 157-341
  • Mfr. Part No. 3VA2216-6KQ42-0AA0
Each
HK$30,057.30
Temporarily out of stock
Schneider Electric RCBO, 10A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type C, Acti9 Range
  • RS Stock No. 654-750
  • Mfr. Part No. A9TDFD610
Each
HK$4,789.68
In Stock
Phoenix Contact Thermomagnetic Device Circuit Breaker Thermal Circuit Breaker - CB 2 Pole 80V dc Voltage Rating, 6A
  • RS Stock No. 212-8793
  • Mfr. Part No. 2800874
Each
HK$722.80
Temporarily out of stock
HENSEL Distribution Board, 6 Way, 125 A
  • RS Stock No. 183-2866
  • Mfr. Part No. FPVN0600GB
Each
HK$9,168.09
Temporarily out of stock
RS PRO SMD Non Resettable Fuse 2.5A, 125V
  • RS Stock No. 182-4112P
Each (Supplied in a Box)
HK$2.315
In Stock
Mersen 400mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 270-3078
  • Mfr. Part No. M090539
Each (In a Box of 10)
HK$4.28
Limited stock
POIGNEE OHBS12/1
  • RS Stock No. 289-1579
  • Mfr. Part No. 1SCA109094R1001
Each
HK$60.10
Temporarily out of stock
Phoenix Contact Surge Protector, Screw Mount Mount
  • RS Stock No. 130-116
  • Mfr. Part No. 2800625
Each
HK$685.78
Temporarily out of stock
Schneider Electric Acti9 1 Phase Distribution Board, 20 Way
  • RS Stock No. 339-637
  • Mfr. Part No. SEA9DE40
Each
HK$2,437.60
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 40A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 210-1707
  • Mfr. Part No. 3VA2040-6KP46-0AA0
Each
HK$14,585.50
In Stock
RS PRO PC Board Non Resettable Fuse, Radial 315mA, 250V
  • RS Stock No. 767-5175
Each (In a Pack of 10)
HK$1.88
In Stock
Better World
Schneider Electric 32A Cartridge Fuse, 10 x 38mm
  • RS Stock No. 219-9050
  • Mfr. Part No. DF2CA32
Each (In a Pack of 10)
HK$120.53
Temporarily out of stock
Hager BD RCD, 40A, 3 Pole, 30mA, Type A-HI, 500V
  • RS Stock No. 599-879
  • Mfr. Part No. BD340
Each
HK$5,105.60
In Stock
Phoenix Contact CAPAROC
  • RS Stock No. 265-8972
  • Mfr. Part No. 1110986
Each
HK$2,793.40
Temporarily out of stock
SENTRON Terminal for use with 3VA61/62 Series
  • RS Stock No. 263-991
  • Mfr. Part No. 3VA9243-0JA12
1 Kit
HK$382.80
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