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

46886 Products showing for Fuses & Circuit Breakers

2281 of 999+
In Stock
Lovato P1RD Residual Current Circuit Breaker, 63A, 4 Pole, 300mA, Type AC, 230 V ac, 400 V ac
  • RS Stock No. 277-5050
  • Mfr. Part No. P1RD4P63AC300
Each
HK$2,029.90
Temporarily out of stock
ABB System Pro M Compact S300P MCB, 1+N, 10A Curve C, 240V AC, 72V DC, 25 kA Breaking Capacity
  • RS Stock No. 203-668
  • Mfr. Part No. 2CDS381103R0104
Each
HK$1,351.10
Temporarily out of stock
Eaton xEffect - FBSmV RCCB, 40A, 2 Pole, 300mA, Type S, 240/415V ac
  • RS Stock No. 121-137
  • Mfr. Part No. 170142 FBSMV-40/2/03-S
Each
HK$1,406.80
Temporarily out of stock
BARRE PONTAGE DTE 12MOD.BLEUE
  • RS Stock No. 250-4757
  • Mfr. Part No. 2CDL310002R1012
1 Box of 10
HK$503.23
Temporarily out of stock
ABB S301 MCB, 1P, 20A Curve C, 415V AC, 125V DC, 100 kA Breaking Capacity
  • RS Stock No. 200-734
  • Mfr. Part No. 2CDS381001R0204
Each
HK$685.07
Temporarily out of stock
Hager Hager MMN Circuit Breaker, 3P, 2.5A, Type AC, 415V AC, 25 kA Breaking Capacity
  • RS Stock No. 599-788
  • Mfr. Part No. MMN303
Each
HK$4,083.00
In Stock
Littelfuse SMD Non Resettable Fuse 7A, 125V ac/dc
  • RS Stock No. 219-6153
  • Mfr. Part No. 0154007.DR
Each (In a Pack of 10)
HK$13.50
In Stock
Schneider Electric Multi 9 MCB, 1P, 4A Curve C, 10 kA Breaking Capacity
  • RS Stock No. 219-9174
  • Mfr. Part No. M9U21104
Each
HK$1,299.40
Temporarily out of stock
Better World
Schneider Electric Busbar Tap-Off Unit with Fuse Isolator, Canalis KS Series
  • RS Stock No. 211-0497
  • Mfr. Part No. KSB160SF5
Each
HK$6,372.70
Temporarily out of stock
Better World
Siemens SENTRON 5SY6 MCB, 3+N, 2A Curve C, 400V AC, 72V DC, 5 kA Breaking Capacity
  • RS Stock No. 209-6691
  • Mfr. Part No. 5SY6602-7
Each
HK$1,358.10
Temporarily out of stock
ABB S303 MCB, 3P, 10A Curve B, 415V AC, 125V DC, 100 kA Breaking Capacity
  • RS Stock No. 201-328
  • Mfr. Part No. 2CDS383001R0105
Each
HK$2,768.81
Temporarily out of stock
Schneider Electric Multifix Cover for use with Circuit Breaker
  • RS Stock No. 275-8813
  • Mfr. Part No. LVS03220
1 Box of 5
HK$754.94
Temporarily out of stock
ABB 500A Tag Fuse, 200 x 68 x 119mm, 500V
  • RS Stock No. 251-3495
  • Mfr. Part No. 1SCA022627R7410
1 Box of 3
HK$6,499.60
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3617
  • Mfr. Part No. 3VA2010-8JQ36-0AA0
Each
HK$19,279.20
Temporarily out of stock
Schneider Electric, PowerPact MCCB 1P 60A, Breaking Capacity 18 kA, Clip-On
  • RS Stock No. 347-159
  • Mfr. Part No. BDF16060
Each
HK$4,175.36
Temporarily out of stock
Eaton 50A Cartridge Fuse, 95 x 76mm
  • RS Stock No. 246-331
  • Mfr. Part No. 1713628 LPC50-ADAPTER
1 Pack of 10
HK$129.60
In Stock
Lovato ModuLo P1MB MCB, 3P, 63A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 825-5860
  • Mfr. Part No. P1MB3PC63
Each
HK$734.10
Temporarily out of stock
Socomec 1, 3 Phase Surge Arrester, 160kA, 1.8kV, DIN Rail Mount
  • RS Stock No. 252-3596
  • Mfr. Part No. 49821444
Each
HK$5,394.71
Temporarily out of stock
Better World
Schneider Electric Acti 9 IC60L MCB, 2P, 12.5A, 440V AC, 15 kA Breaking Capacity
  • RS Stock No. 212-0117
  • Mfr. Part No. A9F90282
Each
HK$1,414.58
Temporarily out of stock
Eaton xEffect FAZ MCB, 1P, 10A Curve B, 250V DC, 10 kA Breaking Capacity
  • RS Stock No. 244-267
  • Mfr. Part No. 176067 FAZ-B10/1-DC
Each
HK$976.57
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