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

2353 of 999+
Hinode Electric Co Ltd 80A Bolted Tag Fuse, 61mm
  • RS Stock No. 103-4249
  • Mfr. Part No. 660GH-080
Each (In a Pack of 5)
HK$215.178
RS PRO 6.3A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 177-8061
1 Box of 1000
HK$14,498.24
Better World
ABB, Tmax XT MCCB 3P 25A, Fixed Mount
  • RS Stock No. 236-6521
  • Mfr. Part No. 1SDA067982R1 XT2V 160 Ekip LSI 25A FF
Each
HK$14,334.30
Europa EUC2P EUC MCB, 2P, 50A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 849-6569
  • Mfr. Part No. EUC2P50C
Each
HK$151.00
Better World
Siemens SENTRON Electronic Circuit Breaker 25A 3VA2, 3 channels
  • RS Stock No. 157-252
  • Mfr. Part No. 3VA2125-5HK32-0AA0
Each
HK$5,617.50
Better World
Schneider Electric Acti 9 Acti9 iDT40N XA MCB, 3P, 6A Curve C, 400V AC
  • RS Stock No. 238-3429
  • Mfr. Part No. A9PA4306
Each
HK$3,510.51
Eaton xEffect - FRCmM RCCB, 80A, 4 Pole, 30mA, Type A, 110V
  • RS Stock No. 127-431
  • Mfr. Part No. 180618 FRCMM-80/4/003-A-110
Each
HK$4,123.90
ABB MCCB Molded Case Circuit Breaker 3P+N 400A, Fixed Mount
  • RS Stock No. 250-4171
  • Mfr. Part No. 1SDA054443R1
Each
HK$39,324.48
Schneider Electric, ComPacT MCCB 3P 100A, Fixed Mount
  • RS Stock No. 260-9517
  • Mfr. Part No. C10R32D100
Each
HK$11,200.51
Eaton Eaton xEnergy Safety Busbar Support for use with CI43…, Modular Busbar System, Prepared Enclosures
  • RS Stock No. 243-870
  • Mfr. Part No. 044005 SE-RS-I43
Each
HK$637.10
Schneider Electric, PowerPact MCCB 2P 100A, Breaking Capacity 18 kA, Clip-On
  • RS Stock No. 345-256
  • Mfr. Part No. BDF26100
Each
HK$6,015.32
Eaton Eaton xEffect Conversion Kit for use with K3X240
  • RS Stock No. 243-933
  • Mfr. Part No. 029769 D-K3X240
Each
HK$865.90
Better World
Schneider Electric Acti 9 4 Phase Busbar, 415V ac, 18mm Pitch
  • RS Stock No. 776-2786
  • Mfr. Part No. A9XPH557
Each
HK$2,757.18
Siemens SENTRON 3VA9 Wire Connector for use with 3VA1 250
  • RS Stock No. 218-1830
  • Mfr. Part No. 3VA9253-0QB00
Each
HK$435.10
Eaton Busbar Support, xEnergy Series
  • RS Stock No. 245-882
  • Mfr. Part No. 133098 XBBB11
Each
HK$244.61
Better World
Siemens SENTRON Electronic Circuit Breaker 250A 3VA2, 4 channels
  • RS Stock No. 157-324
  • Mfr. Part No. 3VA2225-7JQ42-0AA0
Each
HK$30,656.70
Better World
Schneider Electric Acti 9 C60H-DC MCB, 2P, 50A Curve C, 500V DC, 20 kA Breaking Capacity
  • RS Stock No. 776-3228
  • Mfr. Part No. A9N61538
Each
HK$1,963.65
Schurter SMD Non Resettable Fuse 20A, 32 V ac, 63V dc
  • RS Stock No. 703-2786P
  • Mfr. Part No. 3413.0331.22
Each (Supplied on a Reel)
HK$5.08
Eaton AFDD, 32A Current Rating, 2P Poles, 30mA Trip Sensitivity, Type B, Eaton Moeller Range
  • RS Stock No. 246-608
  • Mfr. Part No. 187231 AFDD-32/2/B/003-A
Each
HK$1,925.24
Eaton Eaton Moeller Enclosure for use with PKZM0
  • RS Stock No. 272-2329
  • Mfr. Part No. 263526 CI-PKZ0-GVM
Each
HK$223.74
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