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

47266 Products showing for Fuses & Circuit Breakers

17 of 999+
Better World
Schneider Electric Busbar Tap-Off Unit with Circuit Breaker, Canalis KS Series
  • RS Stock No. 211-0513
  • Mfr. Part No. KSB63SM48
Each
HK$1,331.20
RS PRO BS 1362, F, T Fuse Kit
  • RS Stock No. 893-8546
Each
HK$487.20
RS PRO 15A Blue Blade Car Fuse, 32V dc
  • RS Stock No. 563-750
Each (In a Pack of 10)
HK$4.17
RS PRO Single Phase Industrial Surge Protector, 40kA, 0.9kV, DIN Rail Mount
  • RS Stock No. 101-798
Each
HK$706.70
ABB SMISSLINE TP MCB, 1P, 20A, Type Z, 220V AC
  • RS Stock No. 246-2513
  • Mfr. Part No. 2CCS571001R1208
Each
HK$804.20
Better World
Siemens SENTRON 5SL6 MCB, 3P, 32A Curve C, 6 kA Breaking Capacity
  • RS Stock No. 202-7129
  • Mfr. Part No. 5SL6332-7
Each
HK$561.70
RS PRO 8A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-598
Each (In a Pack of 10)
HK$3.56
Littelfuse 250mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 725-8026
  • Mfr. Part No. 0213.250MXP
Each (In a Bag of 10)
HK$8.46
WAGO Electronic Circuit Breaker 10A 48V 787, 8 channels , DIN Rail
  • RS Stock No. 279-4112
  • Mfr. Part No. 787-1668/000-250
Each
HK$3,182.00
Eaton 4A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 412-914
  • Mfr. Part No. TDC10-4A
Each (In a Pack of 10)
HK$3.11
Wickmann Inline Fuse Holder
  • RS Stock No. 174-0275
  • Mfr. Part No. 01550120ZXU
Each (In a Box of 100)
HK$4.621
Eaton 2A Slow-Blow Ceramic Cartridge Fuse, 50 x 21.5mm
  • RS Stock No. 229-072
  • Mfr. Part No. 2D27 FUSE-D2 2A T GL/GG 500VAC E27
1 Pack of 5
HK$81.50
Schneider Electric, ComPacT MCCB 3P 400A, Fixed Mount
  • RS Stock No. 260-8090
  • Mfr. Part No. C40F32D400
Each
HK$32,856.90
Schneider Electric Thermal Circuit Breaker - GB2 2 Pole 277V ac Voltage Rating DIN Rail Mount, 3A Current Rating
  • RS Stock No. 312-3796
  • Mfr. Part No. GB2DB08
Each
HK$495.30
ABB FH200 RCCB, 40A, 2 Pole, 30mA, Type AC, 230V
  • RS Stock No. 186-3456
  • Mfr. Part No. 2CSF202002R1400
Each
HK$725.20
ABB System Pro M Compact S200 M UC MCB, 1P, 10A Curve K, 230V AC, 220V DC, 10 kA Breaking Capacity
  • RS Stock No. 203-821
  • Mfr. Part No. 2CDS271061R0427
Each
HK$966.04
Schurter 16A PCB Mount Fuse Holder for 5 x 20mm Fuse, 500V ac
  • RS Stock No. 173-7978
  • Mfr. Part No. 0031.2510
Each (In a Box of 25)
HK$123.988
Eaton 100A Ceramic Cartridge Fuse, 22 x 58mm
  • RS Stock No. 703-8475
  • Mfr. Part No. C22G100
Each (In a Pack of 10)
HK$30.91
Better World
Schneider Electric Acti 9 Cover for use with Linergy FH Horizontal Comb Busbar
  • RS Stock No. 776-2831
  • Mfr. Part No. A9XPT920
Each
HK$87.30
Better World
Schneider Electric 10A Cartridge Fuse, 10 x 38mm
  • RS Stock No. 181-2611
  • Mfr. Part No. DF2CA10
Each (In a Box of 10)
HK$50.71
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