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

2225 of 999+
Temporarily out of stock
Siemens SENTRON 5SP3735 MCB, 1P, 35A, Type E
  • RS Stock No. 231-8342
  • Mfr. Part No. 5SP3735-2KK02
Each
HK$982.40
Temporarily out of stock
Schneider Electric, ComPacT New generation MCCB 4P 40A, Breaking Capacity 440 V, Fixed Mount
  • RS Stock No. 205-134
  • Mfr. Part No. C10N47E040
Each
HK$48,054.31
Temporarily out of stock
Better World
Siemens, Sentron MCCB Molded Case Circuit Breaker 3P 100A, Breaking Capacity 3 kA
  • RS Stock No. 245-735
  • Mfr. Part No. 3VA6210-8HN31-0AA0
Each
HK$21,763.60
In Stock
Better World
Schneider Electric Compact Ins, Compact Inv, Compact Nsx, Easypact Cvs, Powerpact Multistandard Phase Barrier for use
  • RS Stock No. 221-1258
  • Mfr. Part No. LV432570
Each
HK$398.30
Temporarily out of stock
ABB System Pro M Compact S300P MCB, 3+N, 20A Curve C, 415V AC, 25 kA Breaking Capacity
  • RS Stock No. 200-961
  • Mfr. Part No. 2CDS383103R0204
Each
HK$4,348.26
In Stock
Eaton xEffect MCB, 3P, 30A Curve C, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 847-3346
  • Mfr. Part No. 102253 FAZ-C30/3-NA
Each
HK$1,115.60
In Stock
ABB Busbar for use with DDA200, F200, S200
  • RS Stock No. 232-0335
  • Mfr. Part No. 2CDL200001R5015 Ast 50/15
Each
HK$72.20
Temporarily out of stock
Schurter SMD Non Resettable Fuse 3.15A, 32 V ac, 63V dc
  • RS Stock No. 173-7780
  • Mfr. Part No. 3413.0221.22.
1 Reel of 1000
HK$3,028.70
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 1kA Ekip Touch LSIG, 3 channels
  • RS Stock No. 259-9942
  • Mfr. Part No. 1SDA070806R1
Each
HK$56,174.03
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 700A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 256-479
  • Mfr. Part No. 3VA5570-5EC46-2AA0
Each
HK$45,619.90
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 6.3kA Ekip Touch LSI, 4 / f channels
  • RS Stock No. 259-3973
  • Mfr. Part No. 1SDA072025R1
Each
HK$577,384.41
Temporarily out of stock
Eaton 32A Centred Tag Fuse, NH0, 500V ac
  • RS Stock No. 703-8661P
  • Mfr. Part No. 32NHG0B
Each (Supplied in a Bag)
HK$80.18
In Stock
Littelfuse 12A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 787-4299
  • Mfr. Part No. 0326012.MXP
Each (In a Pack of 5)
HK$14.04
Temporarily out of stock
Schneider Electric Chassis for use with Compact NS 630b → 1250, Masterpact NT 06 → 12
  • RS Stock No. 247-1864
  • Mfr. Part No. 33725
Each
HK$63,867.98
Temporarily out of stock
Eaton 63A Tag Fuse, 01XL, 1.5kV, 189mm
  • RS Stock No. 282-6544
  • Mfr. Part No. PV-63A-01XL-15
Each
HK$3,513.80
Temporarily out of stock
ABB EV1124 Busbar
  • RS Stock No. 202-314
  • Mfr. Part No. 1STQ001019A0000
Each
HK$4,183.47
Temporarily out of stock
Eaton xEffect MCB, 1P, 3.5A Curve D
  • RS Stock No. 230-1031
  • Mfr. Part No. 177487 FAZ6-D3,5/1
Each
HK$288.46
Temporarily out of stock
Legrand RCBO, 16A, Type F, 240V AC
  • RS Stock No. 255-2328
  • Mfr. Part No. 410855
Each
HK$5,695.64
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 100A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 268-501
  • Mfr. Part No. 3VA6110-5HM41-0AA0
Each
HK$12,639.70
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 6.3kA 1SDA07, 4 channels
  • RS Stock No. 259-3898
  • Mfr. Part No. 1SDA071927R1
Each
HK$481,970.48
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