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

2313 of 999+
Temporarily out of stock
ABB S202M 2CDS2720 MCB, 2P, 16A Curve B, 440V AC, 500V DC, 10 kA Breaking Capacity
  • RS Stock No. 100-091
  • Mfr. Part No. 2CDS272061R0165
1 Box of 1
HK$1,942.60
Temporarily out of stock
Better World
Siemens SENTRON 5SY6 MCB, 4P, 25A Curve C
  • RS Stock No. 216-4786
  • Mfr. Part No. 5SY6425-7
Each
HK$1,466.00
Temporarily out of stock
Eaton xEffect MCB, 3P, 3.5A Curve D
  • RS Stock No. 230-1034
  • Mfr. Part No. 177439 FAZ6-D3,5/3
Each
HK$1,262.42
In Stock
Lovato ModuLo P1MB MCB, 1P, 16A Curve B, 230V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 825-5558
  • Mfr. Part No. P1MB1PB16
Each
HK$139.40
In Stock
Siemens 710A Tag Fuse, NH3, 690V, 151mm
  • RS Stock No. 287-3452
  • Mfr. Part No. 3NE1437-2
Each
HK$2,760.80
Temporarily out of stock
ABB SU200 M MCB, 2P, 3A, Type Z, 440V AC, 96V DC, 15 kA Breaking Capacity
  • RS Stock No. 200-620
  • Mfr. Part No. 2CDS272337R0318
Each
HK$2,481.65
In Stock
Eaton FAZ MCB, 2P, 6A
  • RS Stock No. 221-3493
  • Mfr. Part No. 278794 FAZ-K6/2
Each
HK$779.20
Temporarily out of stock
Eaton xEffect MCB, 2P, 3A Curve C, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 847-3333
  • Mfr. Part No. 278750 FAZ-C3/2
Each
HK$690.70
Temporarily out of stock
Lovato ModuLo P1MB MCB, 4P, 2A Curve B, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 825-5902
  • Mfr. Part No. P1MB4PB02
Each
HK$1,173.36
In Stock
Better World
Siemens SENTRON 5SY7 MCB, 1+N, 3A Curve C, 230V AC, 72V DC, 5 kA Breaking Capacity
  • RS Stock No. 209-7549
  • Mfr. Part No. 5SY7503-7
Each
HK$709.20
In Stock
Better World
Siemens SENTRON 5SL6 MCB, 2P, 2A Curve C, 400V AC, 72V DC
  • RS Stock No. 213-1036
  • Mfr. Part No. 5SL6202-7
Each
HK$629.70
Temporarily out of stock
ABB S301 MCB, 1P, 20A Curve D, 415V AC, 125V DC, 100 kA Breaking Capacity
  • RS Stock No. 203-017
  • Mfr. Part No. 2CDS381001R0201
Each
HK$808.76
In Stock
ABB System Pro M Compact S200M MCB, 3P, 10A Curve B, 440V AC, 10 kA Breaking Capacity
  • RS Stock No. 535-6083
  • Mfr. Part No. 2CDS273001R0105 S203M-B10
Each
HK$748.00
In Stock
Eaton xEffect MCB, 2P, 20A Curve C, 240 → 415V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 847-3302
  • Mfr. Part No. 102171 FAZ-C20/2-NA
Each
HK$714.70
Temporarily out of stock
Better World
Siemens SENTRON 5SY4 MCB, 1+N, 1.6A Curve D, 230V AC, 72V DC, 5 kA Breaking Capacity
  • RS Stock No. 212-8838
  • Mfr. Part No. 5SY4515-8
Each
HK$626.90
Temporarily out of stock
ABB System Pro M Compact SU200 MR MCB, 4P, 40A Curve K, 400V AC, 15 kA Breaking Capacity
  • RS Stock No. 200-882
  • Mfr. Part No. 2CDS274347R0557
Each
HK$7,496.24
Temporarily out of stock
Siemens SENTRON Magnet for use with Circuit Breaker 3WL10 / 3VA27
  • RS Stock No. 265-518
  • Mfr. Part No. 3VW9011-0AK06
Each
HK$2,000.60
Temporarily out of stock
ABB S800U MCB, 1P, 70A Curve K, 240V AC, 30 kA Breaking Capacity
  • RS Stock No. 141-030
  • Mfr. Part No. 2CCS881017R0707
Each
HK$2,408.58
Temporarily out of stock
Hager NGT MCB, 3+N, 6A, 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 144-4802
  • Mfr. Part No. NGT806
Each
HK$2,579.59
In Stock
Lovato ModuLo P1MB MCB, 3P, 2A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 825-5823
  • Mfr. Part No. P1MB3PC02
Each
HK$734.10
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