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

2315 of 999+
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
In Stock
ABB System Pro M Compact S200M MCB, 1+N, 3A Curve D, 230V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 200-999
  • Mfr. Part No. 2CDS271103R0031
Each
HK$1,531.12
Temporarily out of stock
ABB SU200 M MCB, 2P, 10A, Type Z, 440V AC, 96V DC, 15 kA Breaking Capacity
  • RS Stock No. 201-040
  • Mfr. Part No. 2CDS272337R0428
Each
HK$2,296.11
Temporarily out of stock
Legrand MCB, 4P, 32A, 400V AC
  • RS Stock No. 255-2324
  • Mfr. Part No. 409797
Each
HK$5,872.07
Temporarily out of stock
ABB S301 MCB, 1+N, 4A Curve C, 415V AC, 125V DC, 100 kA Breaking Capacity
  • RS Stock No. 203-037
  • Mfr. Part No. 2CDS381103R0044
Each
HK$1,874.42
Temporarily out of stock
ABB S403M MCB, 4P, 10A Curve C, 440V AC, 12V DC, 25 kA Breaking Capacity
  • RS Stock No. 140-393
  • Mfr. Part No. 2CCS573103R8104
Each
HK$4,209.25
Temporarily out of stock
Better World
ABB S200C MCB, 4P, 6A Curve C, 415V AC, 6 kA Breaking Capacity
  • RS Stock No. 212-1659
  • Mfr. Part No. 2CDS254280R0064
Each
HK$1,213.29
Temporarily out of stock
Better World
Siemens SENTRON 5SY7 MCB, 2P, 63A Curve C, 400V AC, 72V DC, 5 kA Breaking Capacity
  • RS Stock No. 212-8904
  • Mfr. Part No. 5SY7263-7
Each
HK$1,682.20
Temporarily out of stock
ABB System Pro M Compact S300P MCB, 1+N, 4A Curve D, 240V AC, 72V DC, 100 kA Breaking Capacity
  • RS Stock No. 204-212
  • Mfr. Part No. 2CDS381103R0041
Each
HK$2,216.95
Temporarily out of stock
Better World
Siemens SENTRON 5SY7 MCB, 4P, 13A Curve C, 400V AC, 72V DC, 5 kA Breaking Capacity
  • RS Stock No. 213-1093
  • Mfr. Part No. 5SY7413-7
Each
HK$1,475.30
Temporarily out of stock
ABB S301 MCB, 1+N, 2A Curve K, 415V AC, 125V DC, 100 kA Breaking Capacity
  • RS Stock No. 203-047
  • Mfr. Part No. 2CDS381103R0277
Each
HK$2,235.98
Temporarily out of stock
ABB SU200 M MCB, 2P, 25A Curve C, 440V AC, 96V DC, 15 kA Breaking Capacity
  • RS Stock No. 203-863
  • Mfr. Part No. 2CDS272337R0254
Each
HK$1,994.87
Temporarily out of stock
ABB System Pro M Compact SU200 MR Circuit Breaker, 4P, 1.6A Curve K, 400V AC, 15 kA Breaking Capacity
  • RS Stock No. 201-270
  • Mfr. Part No. 2CDS274347R0257
Each
HK$6,513.55
Temporarily out of stock
Siemens ALPHA Busbar
  • RS Stock No. 629-037
  • Mfr. Part No. 8GK9736-0KK20
Each
HK$910.12
Temporarily out of stock
ABB S402M MCB, 2P, 25A Curve C, 440V AC, 12V DC, 15 kA Breaking Capacity
  • RS Stock No. 140-365
  • Mfr. Part No. 2CCS572001R0254
Each
HK$1,732.26
Temporarily out of stock
ABB SU200 M MCB, 3P, 3A, Type Z, 400V AC, 15 kA Breaking Capacity
  • RS Stock No. 201-217
  • Mfr. Part No. 2CDS273337R0318
Each
HK$3,489.65
Temporarily out of stock
ABB S303 MCB, 3P, 63A Curve D, 415V AC, 125V DC, 100 kA Breaking Capacity
  • RS Stock No. 203-777
  • Mfr. Part No. 2CDS383001R0631
Each
HK$4,557.59
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 800A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 250-138
  • Mfr. Part No. 3VA6580-6HL46-2AA0
Each
HK$67,467.30
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