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

2283 of 999+
Temporarily out of stock
Eaton xEffect MCB, 1P, 50A Curve B, 240V AC, 48V DC, 10 kA Breaking Capacity
  • RS Stock No. 922-6983
  • Mfr. Part No. 278540 FAZ-B50/1
Each
HK$285.80
Temporarily out of stock
Eaton 63A Cartridge Fuse, 51 x 292mm
  • RS Stock No. 244-261
  • Mfr. Part No. 17.5AILSJ63
1 Pack of 3
HK$31,088.30
In Stock
Eaton xPole MCB, 1+N, 16A Curve C, 230V AC, 6 kA Breaking Capacity
  • RS Stock No. 230-1094
  • Mfr. Part No. 264695 PLG6-C16/1N
Each
HK$135.50
Temporarily out of stock
Eaton, Eaton Moeller Series NZM MCCB Molded Case Circuit Breaker 3P 320A, Breaking Capacity 5 kA, Fixed Mount
  • RS Stock No. 231-229
  • Mfr. Part No. 109694 NZMN3-4-A320
Each
HK$23,633.08
Temporarily out of stock
60A Cartridge Fuse, 23 x 57mm
  • RS Stock No. 262-260
  • Mfr. Part No. 60KR85 60A 415V AC HOUSE SERVICE
1 Pack of 20
HK$2,332.70
Temporarily out of stock
Better World
Siemens Sentron 5SY7 MCB, 3P, 300mA Curve C, 400V AC, 15 kA Breaking Capacity
  • RS Stock No. 622-0367
  • Mfr. Part No. 5SY7314-7
Each
HK$1,219.20
Temporarily out of stock
Siemens SENTRON 5SP3363 MCB, 3P, 63A, Type E
  • RS Stock No. 231-8318
  • Mfr. Part No. 5SP3363-3
Each
HK$3,679.50
In Stock
Lovato ModuLo P1MB MCB, 2P, 16A Curve B, 230V AC, 80V DC, 10 kA Breaking Capacity
  • RS Stock No. 825-5671
  • Mfr. Part No. P1MB2PB16
Each
HK$368.00
In Stock
Better World
ABB System Pro M Compact S200 MCB, 4P, 10A, Type Z
  • RS Stock No. 237-3325
  • Mfr. Part No. 2CDS254001R0428 S204 Z 10A - 10 KA
Each
HK$1,774.00
Temporarily out of stock
Better World
ABB System Pro M Compact S200 MCB, 4P, 500mA Curve D
  • RS Stock No. 237-3333
  • Mfr. Part No. 2CDS254001R0981 S204 D 0.5A - 10 KA
Each
HK$1,940.15
Temporarily out of stock
Better World
Siemens SENTRON 5SY6 MCB, 3P, 300mA Curve C, 400V AC, 72V DC, 5 kA Breaking Capacity
  • RS Stock No. 209-6683
  • Mfr. Part No. 5SY6314-7
Each
HK$892.50
Temporarily out of stock
Better World
Siemens SENTRON 5SL4 MCB, 3+N, 500mA Curve D, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 209-6502
  • Mfr. Part No. 5SL4405-8
Each
HK$1,919.20
Temporarily out of stock
ABB High Performance S800N MCB, 2P, 63A Curve B, 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 435-522
  • Mfr. Part No. 2CCS892001R0635
Each
HK$1,463.22
In Stock
Lovato ModuLo P1MB MCB, 2P, 20A Curve D, 230V AC, 80V DC, 10 kA Breaking Capacity
  • RS Stock No. 825-5762
  • Mfr. Part No. P1MB2PD20
Each
HK$368.00
In Stock
Better World
ABB System Pro M Compact S200 MCB, 3+N, 6A Curve B
  • RS Stock No. 237-3258
  • Mfr. Part No. 2CDS253103R0065+N S203 B 6A NAD
Each
HK$1,687.85
In Stock
Better World
Siemens SENTRON 5SL4 MCB, 1P, 20A Curve C, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 209-6618
  • Mfr. Part No. 5SL4120-7
Each
HK$211.20
Temporarily out of stock
Better World
ABB System Pro M Compact S200 MCB, 4P, 8A, Type Z
  • RS Stock No. 237-3324
  • Mfr. Part No. 2CDS254001R0408 S204 Z 8A - 10 KA
Each
HK$2,090.76
Temporarily out of stock
ABB SMISSLINE TP MCB, 3P, 1A Curve K, 415V AC
  • RS Stock No. 246-2641
  • Mfr. Part No. 2CCS573001R0217
Each
HK$1,477.56
Temporarily out of stock
Better World
ABB S200C MCB, 4P, 2A Curve C, 415V AC, 6 kA Breaking Capacity
  • RS Stock No. 212-1655
  • Mfr. Part No. 2CDS254280R0024
Each
HK$1,343.93
Temporarily out of stock
Better World
Siemens SENTRON 5SL4 MCB, 3P, 63A Curve D, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 209-6497
  • Mfr. Part No. 5SL4363-8
Each
HK$2,649.50
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