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

76 of 999+
ABB S802N MCB, 2P, 25A Curve C, 690V AC, 36 kA Breaking Capacity
  • RS Stock No. 140-595
  • Mfr. Part No. 2CCS892001R0254
Each
HK$3,127.32
Schneider Electric Resi9 R9F23 Circuit Breaker, 1P, 16A Curve B, 230V AC, 6000 A Breaking Capacity
  • RS Stock No. 655-494
  • Mfr. Part No. R9F23116
Each
HK$98.09
NEMIQ Earthing Strap Copper
  • RS Stock No. 283-7540
  • Mfr. Part No. JF 6-150 M6
Each
HK$162.50
ABB S800S MCB, 4P, 20A Curve K, 240V AC, 50 kA Breaking Capacity
  • RS Stock No. 140-257
  • Mfr. Part No. 2CCS864001R0487
Each
HK$8,784.16
Siemens SENTRON Undervoltage Release
  • RS Stock No. 277-0738
  • Mfr. Part No. 3WA9111-0AE07
Each
HK$3,589.90
Eaton Eaton Moeller 3 Phase Busbar, 690V, 55mm Pitch
  • RS Stock No. 272-2293
  • Mfr. Part No. 220221 B3.0/3-PKZ4
Each
HK$375.60
ABB S804N MCB, 4P, 32A Curve D, 690V AC, 36 kA Breaking Capacity
  • RS Stock No. 141-113
  • Mfr. Part No. 2CCS894001R0321
Each
HK$6,353.60
Better World
Schneider Electric Busbar Trunking Fixing Bracket, Canalis KS Series
  • RS Stock No. 219-8927
  • Mfr. Part No. KSA80EZ5
Each (In a Pack of 10)
HK$453.952
Schneider Electric, ComPacT New Generation MCCB 3P 100A, Fixed Mount
  • RS Stock No. 260-7775
  • Mfr. Part No. C16H34V100
Each
HK$24,250.46
RS PRO 20A Yellow Blade Car Fuse, 32V dc
  • RS Stock No. 563-560
Each (In a Pack of 10)
HK$4.69
Schneider Electric, PowerPact MCCB 1P 110A, Breaking Capacity 65 kA, Clip-On
  • RS Stock No. 428-844
  • Mfr. Part No. BJF16110
Each
HK$8,812.97
Hager Hager NEN Circuit Breaker, 3P, 32A Curve B, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 599-905
  • Mfr. Part No. NEN332
Each
HK$1,785.50
Socomec 3 Phase Industrial Surge Protector, 40kA
  • RS Stock No. 224-2519
  • Mfr. Part No. 49821432
Each
HK$5,944.94
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 600A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 249-462
  • Mfr. Part No. 3VA6560-7HN36-0AA0
Each
HK$38,002.70
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 70 kA
  • RS Stock No. 210-1617
  • Mfr. Part No. 3VA1110-6EF32-0AA0
Each
HK$3,886.60
Better World
ABB, Tmax XT MCCB 4P 63A, Fixed Mount
  • RS Stock No. 236-6540
  • Mfr. Part No. 1SDA068012R1 XT2V 160 Ekip I 63A FF
Each
HK$11,351.90
Better World
Schneider Electric Acti 9 1 Phase Busbar, 415V ac, 18mm Pitch
  • RS Stock No. 806-7228
  • Mfr. Part No. A9XPH112
Each
HK$165.10
ABB S800S MCB, 4P, 50A Curve K, 240V AC, 50 kA Breaking Capacity
  • RS Stock No. 140-788
  • Mfr. Part No. 2CCS864001R0577
Each
HK$9,521.27
ABB S800S MCB, 2P, 13A Curve B, 240V AC, 50 kA Breaking Capacity
  • RS Stock No. 140-680
  • Mfr. Part No. 2CCS862001R0135
Each
HK$3,627.42
HENSEL ENYBOARD Distribution Board, 41 A
  • RS Stock No. 117-788
  • Mfr. Part No. RK 0612 T
Each
HK$525.80
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