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

2314 of 999+
In Stock
Better World
ABB System Pro M Compact S200 MCB, 3+N, 50A Curve D
  • RS Stock No. 237-3296
  • Mfr. Part No. 2CDS253103R0501
Each
HK$2,797.20
Temporarily out of stock
ABB SU200 M MCB, 2P, 3A Curve C, 440V AC, 96V DC, 15 kA Breaking Capacity
  • RS Stock No. 200-614
  • Mfr. Part No. 2CDS272337R0034
Each
HK$1,994.87
Temporarily out of stock
Siemens SENTRON 5SP3216 MCB, 2P, 16A, Type E
  • RS Stock No. 231-8305
  • Mfr. Part No. 5SP3216-3
Each
HK$2,149.80
Being discontinued
RS PRO PC Board Non Resettable Fuse, Axial 500mA, 250V ac
  • RS Stock No. 764-9536
Each (In a Pack of 10)
HK$4.77
Temporarily out of stock
Eaton xEffect MCB, 2P, 500mA Curve C, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 847-3210
  • Mfr. Part No. 102157 FAZ-C0,5/2-NA
Each
HK$1,090.18
Temporarily out of stock
ABB System Pro M Compact S300P MCB, 4P, 1.6A Curve C, 415V AC, 100 kA Breaking Capacity
  • RS Stock No. 202-862
  • Mfr. Part No. 2CDS384001R0974
Each
HK$4,500.50
Temporarily out of stock
Lovato MCB, 1P, 4A Curve C, 400V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 188-1633
  • Mfr. Part No. P1MBUH1PC04
Each
HK$494.41
In Stock
Eaton xEffect MCB, 3P, 10A Curve D, 230 → 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 769-4740
  • Mfr. Part No. 168080 FAZ6-D10/3
Each
HK$833.50
In Stock
Lovato ModuLo P1MB MCB, 2P, 40A Curve B, 230V AC, 80V DC, 10 kA Breaking Capacity
  • RS Stock No. 825-5696
  • Mfr. Part No. P1MB2PB40
Each
HK$408.90
Temporarily out of stock
ABB S302 MCB, 2P, 3A Curve K, 415V AC, 125V DC, 100 kA Breaking Capacity
  • RS Stock No. 200-914
  • Mfr. Part No. 2CDS382001R0317
Each
HK$2,464.33
Temporarily out of stock
ABB System Pro M Compact SU200 MR Circuit Breaker, 1P, 15A Curve K, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 202-897
  • Mfr. Part No. 2CDS271347R0457
Each
HK$1,119.23
Temporarily out of stock
ABB S800U MCB, 3P, 50A, Type Z, 240V AC, 50 kA Breaking Capacity
  • RS Stock No. 141-196
  • Mfr. Part No. 2CCS863017R0505
Each
HK$7,260.84
Temporarily out of stock
Better World
Siemens SENTRON 5SL4 MCB, 1P, 13A Curve B, 10 kA Breaking Capacity
  • RS Stock No. 202-7184
  • Mfr. Part No. 5SL4103-6
Each
HK$201.40
Temporarily out of stock
ABB SMISSLINE TP MCB, 1P, 6A Curve K, 250V AC
  • RS Stock No. 246-2487
  • Mfr. Part No. 2CCS571001R0377
Each
HK$416.54
In Stock
Better World
ABB System Pro M Compact S200 MCB, 1P, 40A Curve K, 230V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 746-7961
  • Mfr. Part No. 2CDS251001R0557 S201-K40
Each
HK$265.10
Temporarily out of stock
ABB System Pro M Compact S300P MCB, 1+N, 40A Curve K, 240V AC, 72V DC, 25 kA Breaking Capacity
  • RS Stock No. 203-685
  • Mfr. Part No. 2CDS381103R0557
Each
HK$2,235.98
In Stock
Better World
ABB System Pro M Compact S200 MCB, 1P, 13A Curve K, 230V AC, 6 kA Breaking Capacity
  • RS Stock No. 746-7958
  • Mfr. Part No. 2CDS251001R0447 S201-K13
Each
HK$314.00
In Stock
Hager NFT MCB, 3+N, 20A, 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 144-4751
  • Mfr. Part No. NFT820
Each
HK$1,538.66
In Stock
Eaton xEffect MCB, 3P, 16A Curve C, 240 → 415V AC, 96V DC, 10 kA Breaking Capacity
  • RS Stock No. 922-7128
  • Mfr. Part No. 278975 FAZ-C16/3N
Each
HK$1,334.00
Temporarily out of stock
Lovato ModuLo P1MB MCB, 4P, 16A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 825-5961
  • Mfr. Part No. P1MB4PC16
Each
HK$942.50
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