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

2301 of 999+
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
Schneider Electric, PowerPact B Circuit breaker 4P 125A, Clip-On
  • RS Stock No. 119-196
  • Mfr. Part No. BDF46125
Each
HK$16,460.89
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
Temporarily out of stock
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 3P 125A, Breaking Capacity 18.5 kA, Plug In
  • RS Stock No. 229-537
  • Mfr. Part No. 113199 NZMB2-S125-SVE
Each
HK$7,710.28
In Stock
Eaton 35A Bolted Tag Fuse, 500 V dc, 690V ac, 63.5mm
  • RS Stock No. 181-8699
  • Mfr. Part No. 35ET
Each
HK$883.90
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 100A, Fixed Mount
  • RS Stock No. 260-7983
  • Mfr. Part No. C25R46E100
Each
HK$39,232.80
Temporarily out of stock
Eaton 500mA Cartridge Fuse, 327 x 41.3mm
  • RS Stock No. 229-222
  • Mfr. Part No. 15.5CAVH0.5E 15.5KV 0.5A 12" FUSE
1 Pack of 5
HK$13,030.70
In Stock
Eaton 4A British Standard Fuse, A1, 550V ac, 44.5mm
  • RS Stock No. 415-115
  • Mfr. Part No. NIT4
Each (In a Pack of 5)
HK$113.32
Temporarily out of stock
Lovato ModuLo P1MB MCB, 4P, 40A Curve D, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 825-6015
  • Mfr. Part No. P1MB4PD40
Each
HK$942.50
Temporarily out of stock
ABB System Pro M Compact SU200 MR Circuit Breaker, 2P, 60A Curve K, 400V AC, 15 kA Breaking Capacity
  • RS Stock No. 200-640
  • Mfr. Part No. 2CDS272347R0587
Each
HK$5,197.46
Temporarily out of stock
Better World
Siemens, Sentron MCCB Molded Case Circuit Breaker 4P 40A, Breaking Capacity 2.5 kA
  • RS Stock No. 245-324
  • Mfr. Part No. 3VA6140-7JT41-0AA0
Each
HK$20,459.60
Temporarily out of stock
Siemens, SENTRON MCCB 4P 1.25kA, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 270-4886
  • Mfr. Part No. 3VA2612-6HL42-0AA0
Each
HK$148,791.60
In Stock
Mersen 355A NH Fuse, NH2, 500V ac
  • RS Stock No. 375-9711
  • Mfr. Part No. Q201862
Each
HK$226.81
Temporarily out of stock
Phoenix Contact Surge Protector, 440V ac, Screw Mount Mount
  • RS Stock No. 265-7498
  • Mfr. Part No. 2803409
Each
HK$707.60
Temporarily out of stock
ABB RCBO, 6A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type C, System Pro M Compact Range
  • RS Stock No. 181-4370
  • Mfr. Part No. 2CSA255103R1064 DS-ARC1 C6 A30
Each
HK$2,687.98
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 25A 3VA2, 3 channels
  • RS Stock No. 157-273
  • Mfr. Part No. 3VA2125-5KQ36-0AA0
Each
HK$16,013.40
In Stock
SIBA 35A NH Fuse, NH000, 690V ac
  • RS Stock No. 431-6977
  • Mfr. Part No. 20-477-34/35A
Each
HK$592.58
Temporarily out of stock
ABB S800PV MCB, 2P, 32A, 800V DC, 5 kA Breaking Capacity
  • RS Stock No. 225-5954
  • Mfr. Part No. 2CCF019635R0001 S802PV-SD32
Each
HK$1,664.22
Temporarily out of stock
Better World
Schneider Electric Acti 9 iC60H MCB, 3P, 63A Curve C, 440V AC, 180V DC, 10 kA Breaking Capacity
  • RS Stock No. 776-3307
  • Mfr. Part No. A9F87363
Each
HK$4,000.47
Temporarily out of stock
ABB SMISSLINE TP MCB, 2P, 63A Curve B, 400V AC
  • RS Stock No. 246-2601
  • Mfr. Part No. 2CCS572001R0635
Each
HK$1,497.01
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