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

148 of 999+
Temporarily out of stock
Schneider Electric, PowerPact B Circuit breaker 3P 80A, Breaking Capacity 18 KA, Clip-On
  • RS Stock No. 119-355
  • Mfr. Part No. BDL36080LU
Each
HK$8,627.60
Temporarily out of stock
Phoenix Contact Surge Arrester, DIN Rail Mount
  • RS Stock No. 133-896
  • Mfr. Part No. 2909629
Each (In a Pack of 6)
HK$2,597.217
Temporarily out of stock
Phoenix Contact 1 Phase Surge Arrester, DIN Rail Mount
  • RS Stock No. 135-968
  • Mfr. Part No. 2906100
Each (In a Pack of 10)
HK$288.69
Temporarily out of stock
Phoenix Contact Thermal Circuit Breaker - TCP1A Single Pole 65 V dc, 250V ac Voltage Rating On Base Element, 1A
  • RS Stock No. 170-3783
  • Mfr. Part No. 0712194
Each (In a Box of 20)
HK$123.525
Temporarily out of stock
Schneider Electric Acti9 Busbar, 415V ac, 19mm Pitch
  • RS Stock No. 653-965
  • Mfr. Part No. A9XPH306
Each
HK$371.57
Temporarily out of stock
Eaton 4.5A Resettable Fuse, 6V
  • RS Stock No. 225-8262
  • Mfr. Part No. PTSLR12066V450
Each (In a Pack of 10)
HK$3.84
Currently unavailable
Altech Thermal Circuit Breaker - V-EA 2 Pole 277V Voltage Rating DIN Rail Mount, 10A Current Rating
  • RS Stock No. 899-1856
  • Mfr. Part No. 2G10UM
Each
HK$295.90
Temporarily out of stock
SENTRON Wire Connector for use with 3VA55, 3VA65/66 Series
  • RS Stock No. 263-617
  • Mfr. Part No. 3VA9673-0JJ44
1 Kit
HK$3,117.60
Temporarily out of stock
ABB MCCB Molded Case Circuit Breaker 3P 400A, Fixed Mount
  • RS Stock No. 250-4237
  • Mfr. Part No. 1SDA054537R1
Each
HK$39,236.09
Temporarily out of stock
Sensata Airpax Airpax Thermal Circuit Breaker - M39019 Single Pole Panel Mount, 15A Current Rating
  • RS Stock No. 275-0415
  • Mfr. Part No. M39019/01-255S
Each
HK$7,797.30
Temporarily out of stock
Better World
ABB, Tmax XT MCCB 4P 100A, Fixed Mount
  • RS Stock No. 236-6691
  • Mfr. Part No. 1SDA068321R1 XT4S 160 TMA 100A FF
Each
HK$7,200.30
Temporarily out of stock
Eaton xEffect MCB, 4P, 32A Curve C, 240 → 415V AC, 96V DC, 10 kA Breaking Capacity
  • RS Stock No. 922-7156
  • Mfr. Part No. 279064 FAZ-C32/4
Each
HK$1,646.92
Temporarily out of stock
Eaton xEffect MCB, 4P, 3A Curve B
  • RS Stock No. 230-0907
  • Mfr. Part No. 177425 FAZ6-B3/4
Each
HK$941.57
Temporarily out of stock
Siemens 8WH9130 Terminal for use with Mounting Plates
  • RS Stock No. 230-2199
  • Mfr. Part No. 8WH9130-0NA00
Each (In a Pack of 10)
HK$90.77
Temporarily out of stock
Better World
Schneider Electric Acti 9 C120N MCB, 3P, 125A Curve D, 440V AC, 375V DC, 10 kA, 20 kA Breaking Capacity
  • RS Stock No. 776-3095
  • Mfr. Part No. A9N18389
Each
HK$8,648.28
Temporarily out of stock
ABB S803S RCCB, 63A, 3 Pole, 690V
  • RS Stock No. 140-866
  • Mfr. Part No. 2CCS803901R0599
Each
HK$15,804.18
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
Schneider Electric Acti9 A9F76 MCB, 4P, 32A, 440V AC, 250V DC, 6000 A Breaking Capacity
  • RS Stock No. 276-8724
  • Mfr. Part No. A9F76432
Each
HK$2,158.21
Temporarily out of stock
Schneider Electric Multi9 M9F1 MCB, 2P, 16A Curve D, 440V AC, 125V DC, 6 kA Breaking Capacity
  • RS Stock No. 212-129
  • Mfr. Part No. M9F12216
Each
HK$853.48
Temporarily out of stock
Schneider Electric MasterPacT Locking Kit for use with MasterPact NW
  • RS Stock No. 341-050
  • Mfr. Part No. 64928
Each
HK$3,549.33
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