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

2282 of 999+
Temporarily out of stock
ABB SU200 M MCB, 4P, 3A Curve C, 480V AC, 15 kA Breaking Capacity
  • RS Stock No. 200-839
  • Mfr. Part No. 2CDS274337R0034
Each
HK$4,009.16
Temporarily out of stock
Eaton Three Phase Surge Protector, 40kA, 2.2kV, DIN Rail Mount
  • RS Stock No. 120-849
  • Mfr. Part No. 167611 SPCT2-460/4
Each
HK$8,087.58
Temporarily out of stock
Better World
ABB, XT3S MCCB 3P 125A, Fixed Mount
  • RS Stock No. 236-6662
  • Mfr. Part No. 1SDA068268R1 XT3S 250 TMG 125A FF
Each
HK$6,970.80
Temporarily out of stock
Better World
Schneider Electric, Compact MCCB 4P 100A, Breaking Capacity 36 kA, DIN Rail Mount
  • RS Stock No. 178-7980
  • Mfr. Part No. LV426777
Each
HK$8,935.72
In Stock
Better World
Siemens SENTRON 5SY4 MCB, 1+N, 13A Curve C, 230V AC, 72V DC, 5 kA Breaking Capacity
  • RS Stock No. 209-6664
  • Mfr. Part No. 5SY4513-7
Each
HK$676.40
In Stock
Better World
Siemens SENTRON 5SL6 MCB, 2P, 10A Curve C, 400V AC, 72V DC
  • RS Stock No. 213-1038
  • Mfr. Part No. 5SL6210-7
Each
HK$517.50
In Stock
Hager NFT MCB, 1+N, 16A, 240 → 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 144-4742
  • Mfr. Part No. NFT716
Each
HK$739.62
In Stock
Better World
ABB S200C MCB, 2P, 4A Curve C, 415V AC, 6 kA Breaking Capacity
  • RS Stock No. 212-1617
  • Mfr. Part No. 2CDS252280R0044
Each
HK$436.10
Temporarily out of stock
ABB System Pro M Compact S200 MCB, 1P, 500mA Curve C, 253V AC, 72V DC, 20 kA Breaking Capacity
  • RS Stock No. 488-6353
  • Mfr. Part No. 2CDS251001R0984 - S201C0.5
Each
HK$264.90
In Stock
Better World
ABB System Pro M Compact S200 MCB, 1P, 63A Curve B, 230V AC, 6 kA Breaking Capacity
  • RS Stock No. 746-7554
  • Mfr. Part No. 2CDS251001R0635 S201-B63
Each
HK$151.70
Temporarily out of stock
Better World
Siemens SENTRON 5SY6 MCB, 4P, 3A Curve C, 400V AC, 72V DC, 6 kA Breaking Capacity
  • RS Stock No. 209-6023
  • Mfr. Part No. 5SY6403-7
Each
HK$1,466.00
Temporarily out of stock
Eaton xEffect MCB, 4P, 50A Curve D, 230 → 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 769-4823
  • Mfr. Part No. 168095 FAZ6-D50/4
Each
HK$1,869.95
In Stock
Eaton 2A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 537-1341
  • Mfr. Part No. S506-2-R
Each (In a Pack of 10)
HK$4.14
Temporarily out of stock
Schurter 8A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 173-8074
  • Mfr. Part No. 8020.5077.G
1 Box of 1000
HK$3,389.80
In Stock
Lovato ModuLo P1MB MCB, 1P, 4A Curve C, 230V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 825-5586
  • Mfr. Part No. P1MB1PC04
Each
HK$149.50
Temporarily out of stock
ABB SMISSLINE TP MCB, 2P, 50A Curve K, 415V AC
  • RS Stock No. 246-2597
  • Mfr. Part No. 2CCS572001R0577
Each
HK$1,471.42
Temporarily out of stock
ABB High Performance S800N MCB, 4P, 63A Curve C, 690V AC, 375V DC, 36 kA Breaking Capacity
  • RS Stock No. 183-3682
  • Mfr. Part No. 2CCS894001R0634
Each
HK$2,944.50
Temporarily out of stock
Better World
ABB System Pro M Compact S200 MCB, 3P, 15A Curve K
  • RS Stock No. 237-3245
  • Mfr. Part No. 2CDS253001R0457
Each
HK$1,170.60
Temporarily out of stock
Better World
Siemens SENTRON 5SL4 MCB, 2P, 300mA Curve C, 400V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 209-5967
  • Mfr. Part No. 5SL4214-7
Each
HK$779.70
Temporarily out of stock
Better World
Siemens SENTRON 5SL4 MCB, 3P, 63A Curve B, 400V AC, 72V DC
  • RS Stock No. 209-7464
  • Mfr. Part No. 5SL4363-6
Each
HK$1,300.50
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