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

215 of 999+
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. 181-4381
  • Mfr. Part No. DS-ARC1 M C6 A30
Each
HK$2,692.07
Temporarily out of stock
Schneider Electric Acti9 Acti9 Auxiliaires MCB, 24V AC
  • RS Stock No. 358-297
  • Mfr. Part No. A9A27108
Each
HK$1,725.19
Temporarily out of stock
ABB System Pro M Compact S201M MCB, 1+N, 500mA Curve C, 230V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 203-845
  • Mfr. Part No. 2CDS271103R0984
Each
HK$1,323.98
Temporarily out of stock
Better World
Siemens SENTRON 5SY4 MCB, 4P, 1.6A Curve D, 400V AC, 72V DC, 5 kA Breaking Capacity
  • RS Stock No. 212-8831
  • Mfr. Part No. 5SY4415-8
Each
HK$1,698.30
Temporarily out of stock
ABB System Pro M Compact SU200 MR Circuit Breaker, 3P, 2A Curve K, 400V AC, 15 kA Breaking Capacity
  • RS Stock No. 200-680
  • Mfr. Part No. 2CDS273347R0277
Each
HK$4,554.54
Temporarily out of stock
ABB SU200 M MCB, 4P, 35A Curve K, 480V AC, 15 kA Breaking Capacity
  • RS Stock No. 200-246
  • Mfr. Part No. 2CDS274337R0547
Each
HK$4,757.59
Temporarily out of stock
Better World
Siemens SENTRON 3VA1 MCB, 4P, 25A
  • RS Stock No. 224-7833
  • Mfr. Part No. 3VA1125-4GF42-0AA0
Each
HK$4,412.70
Temporarily out of stock
Better World
Siemens SENTRON 5SL4 MCB, 3+N, 300mA Curve D, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 209-6546
  • Mfr. Part No. 5SL4614-8
Each
HK$1,746.80
Temporarily out of stock
Better World
Siemens SENTRON 3VA1 MCB, 2P, 63A
  • RS Stock No. 224-7872
  • Mfr. Part No. 3VA1163-3ED26-0AA0
Each
HK$2,756.80
In Stock
ABB System Pro M Compact S200 MCB, 1P, 1.6A Curve C, 253V AC, 72V DC, 6 kA Breaking Capacity
  • RS Stock No. 488-6331
  • Mfr. Part No. 2CDS251001R0974 - S201C1.6
Each
HK$192.40
In Stock
Siemens SENTRON 5SJ4 MCB, 1P, 2A Curve C, 14 kA Breaking Capacity
  • RS Stock No. 202-7105
  • Mfr. Part No. 5SJ4102-7HG41
Each
HK$488.10
In Stock
ABB System Pro M Compact S200 MCB, 1P, 20A Curve B, 253V AC, 72V DC, 6 kA Breaking Capacity
  • RS Stock No. 488-6971
  • Mfr. Part No. 2CDS251001R0205 - S201B20
Each
HK$186.20
Temporarily out of stock
Siemens SENTRON 5SJ MCB, 1P, 15A
  • RS Stock No. 232-2234
  • Mfr. Part No. 5SJ4118-7HG41
Each
HK$478.70
In Stock
Better World
ABB System Pro M Compact S200M MCB, 2P, 50A Curve C, 440V AC, 125V DC, 10 kA Breaking Capacity
  • RS Stock No. 132-021
  • Mfr. Part No. 2CDS272001R0504 S202M-C50
Each
HK$499.40
Temporarily out of stock
ABB System Pro M Compact S300P MCB, 4P, 750mA Curve K, 415V AC, 100 kA Breaking Capacity
  • RS Stock No. 203-746
  • Mfr. Part No. 2CDS384001R0187
Each
HK$5,280.71
Temporarily out of stock
ABB System Pro M Compact S200 MCB, 3P, 13A Curve B, 400V AC, 110V DC, 10 kA Breaking Capacity
  • RS Stock No. 200-928
  • Mfr. Part No. 2CDS253001R0135
Each
HK$1,899.06
Temporarily out of stock
Better World
Siemens SENTRON 5SY MCB, 2P, 10A, Type A
  • RS Stock No. 232-2292
  • Mfr. Part No. 5SY4210-5
Each
HK$919.10
In Stock
Eaton xEffect MCB, 1P, 10A Curve C, 230 → 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 769-4536
  • Mfr. Part No. 239035 FAZ6-C10/1
Each
HK$160.70
In Stock
ABB System Pro M Compact S200 MCB, 1P, 10A Curve B, 253V AC, 72V DC, 6 kA Breaking Capacity
  • RS Stock No. 488-7110
  • Mfr. Part No. 2CDS251001R0105 - S201B10
Each
HK$165.00
In Stock
ETA Thermal Circuit Breaker - 1610 Single Pole 32V dc Voltage Rating, 15A Current Rating
  • RS Stock No. 409-895
  • Mfr. Part No. 1610-21-15A
Each
HK$80.00
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