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

2317 of 999+
Temporarily out of stock
Schneider Electric, Compact MCCB 4P 1.25kA, Fixed Mount
  • RS Stock No. 247-1793
  • Mfr. Part No. 33404
Each
HK$51,723.34
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 100A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 269-894
  • Mfr. Part No. 3VA6110-6JQ31-2AA0
Each
HK$20,424.30
Temporarily out of stock
Eaton RCBO, 25A Current Rating, 3+N Poles, 100mA Trip Sensitivity, Type C, xPole Range
  • RS Stock No. 231-697
  • Mfr. Part No. 120680 mRB4-25/3N/C/01-A
Each
HK$4,129.51
In Stock
RS PRO 50A Bolted Tag Fuse, 350 V dc, 690V ac, 63.5mm
  • RS Stock No. 221-3662
Each (In a Pack of 5)
HK$81.52
In Stock
Eaton Moeller xPole 3 Phase Busbar, 500V
  • RS Stock No. 252-825
  • Mfr. Part No. 215645 EVG-3PHAS/9MODUL
Each
HK$80.45
Temporarily out of stock
Better World
Schneider Electric Linergy Mounting Plate for use with AK5 Series
  • RS Stock No. 211-2277
  • Mfr. Part No. AK5PC32LPH
Each (In a Pack of 6)
HK$235.883
Temporarily out of stock
Eaton 125A Fuse Holder for 22.2 x 58mm Fuse, 3P, 690V
  • RS Stock No. 229-020
  • Mfr. Part No. CH223DNU 3P+N 22x58 Fuse Holder
Each
HK$1,714.60
Temporarily out of stock
Siemens 230V ac Circuit Trip
  • RS Stock No. 223-7656
  • Mfr. Part No. 5TT4462-0
Each
HK$802.30
Temporarily out of stock
Better World
Siemens RCBO, 16A Current Rating, 2P Poles, 30mA Trip Sensitivity, Sentron Range
  • RS Stock No. 225-8771
  • Mfr. Part No. 5SU1356-7GV16
Each (In a Pack of 36)
HK$1,272.178
Temporarily out of stock
Schurter 16A Panel Mount Fuse Holder for 6.3 x 32mm Fuse, 2P, 600V ac
  • RS Stock No. 144-1797
  • Mfr. Part No. 0031.9159
Each (In a Box of 25)
HK$119.12
Temporarily out of stock
Siemens, SENTRON MCCB 3P 10A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 147-753
  • Mfr. Part No. 3VA5191-1MH31-0AA0
Each
HK$4,477.80
Temporarily out of stock
Eaton RCBO, 40A Current Rating, 2P Poles, 100mA Trip Sensitivity, Type A, Type C, FRBm6 Range
  • RS Stock No. 123-676
  • Mfr. Part No. 170836 FRBM6-C40/2/01-LIA
Each
HK$1,703.15
In Stock
Better World
Schneider Electric RCBO, 32A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type C, Acti9 Range
  • RS Stock No. 238-3338
  • Mfr. Part No. A9DV3632
Each
HK$3,151.11
Temporarily out of stock
Better World
Siemens 5sV3 RCCB, 40A, 2 Pole, 30mA, Type A, 230V ac
  • RS Stock No. 211-9631
  • Mfr. Part No. 5SV3314-6KK01
Each
HK$3,667.10
Temporarily out of stock
ABB SU200 M MCB, 4P, 30A Curve C, 480V AC, 15 kA Breaking Capacity
  • RS Stock No. 201-120
  • Mfr. Part No. 2CDS274337R0304
Each
HK$3,953.21
In Stock
Schneider Electric RCBO, 25A Current Rating, 4P Poles, 30mA Trip Sensitivity, Type C, Acti9 Range
  • RS Stock No. 130-866
  • Mfr. Part No. A9D77425
Each
HK$13,230.23
In Stock
Schneider Electric, ComPacT MCCB 4P 160A, Fixed Mount
  • RS Stock No. 288-7182
  • Mfr. Part No. C166TM160
Each
HK$7,035.09
Temporarily out of stock
Siemens Alpha Mounting Rail for use with Standard Mounting Rail
  • RS Stock No. 209-7097
  • Mfr. Part No. 8GK9910-1KK40
Each (In a Pack of 10)
HK$87.52
Temporarily out of stock
Circuit Breaker,32 A,3 + N
  • RS Stock No. 611-286
  • Mfr. Part No. PLSM-C32/3N-MW
Each
HK$1,046.87
In Stock
Better World
Schneider Electric MCCB, Clip-On
  • RS Stock No. 178-7866
  • Mfr. Part No. LV426844
Each
HK$903.60
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