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

113 of 999+
Temporarily out of stock
Eaton Fuse Holder Neozed Gauge Piece
  • RS Stock No. 231-486
  • Mfr. Part No. 10GN02
1 Pack of 50
HK$614.50
Temporarily out of stock
Siemens SENTRON Mounting Plate for use with 3VA1 250
  • RS Stock No. 210-3523
  • Mfr. Part No. 3VA9211-0WK40
Each
HK$205.80
Temporarily out of stock
Eaton 6A Cartridge Fuse, 1.5 x 0.41in
  • RS Stock No. 229-128
  • Mfr. Part No. FNQ-6
1 Pack of 10
HK$5,383.10
Temporarily out of stock
Siemens SENTRON Cover for use with 3VA1 400/630 and 3VA2 400/630
  • RS Stock No. 210-9385
  • Mfr. Part No. 3VA9401-0WG30
Each
HK$643.20
Temporarily out of stock
SENTRON Wire Connector for use with 3VA53/54, 3VA63/64 Series
  • RS Stock No. 263-524
  • Mfr. Part No. 3VA9373-0JJ24
1 Kit
HK$1,496.90
In Stock
Wickmann Fuse Block
  • RS Stock No. 174-0631
  • Mfr. Part No. 65800001009
Each (In a Pack of 10)
HK$16.78
Temporarily out of stock
Eaton 12A Slow-Blow Cartridge Fuse, 22.2 x 58mm
  • RS Stock No. 228-923
  • Mfr. Part No. C22M12
1 Pack of 10
HK$425.30
Temporarily out of stock
ABB System Pro M Compact S200 M UC MCB, 4P, 13A Curve K, 400V AC, 440V DC, 10 kA Breaking Capacity
  • RS Stock No. 200-829
  • Mfr. Part No. 2CDS274061R0447
Each
HK$5,212.49
Temporarily out of stock
Better World
Siemens SIRIUS Electronic Circuit Breaker 160mA 3RV2, 3 channels , DIN Rail Mount
  • RS Stock No. 160-101
  • Mfr. Part No. 3RV2411-0AA15
Each
HK$737.50
In Stock
Eaton RCBO, 10A Current Rating, 2P Poles, 100mA Trip Sensitivity, Type A, Type D, FRBdM Range
  • RS Stock No. 121-036
  • Mfr. Part No. 168289 FRBDM-D10/1N/01-G/A
Each
HK$1,569.94
Temporarily out of stock
Sensata Airpax Airpax Thermal Circuit Breaker - M39019 Single Pole Panel Mount, 10A Current Rating
  • RS Stock No. 275-0413
  • Mfr. Part No. M39019/01-249S
Each
HK$5,623.00
In Stock
ABB High Performance S800S MCB, 2P, 80A Curve C, 400V AC, 250V DC, 50 kA Breaking Capacity
  • RS Stock No. 435-510
  • Mfr. Part No. 2CCG001229R0001
Each
HK$2,109.90
Temporarily out of stock
Siemens SENTRON Wire Connector for use with 3VA15/25 1000
  • RS Stock No. 269-7233
  • Mfr. Part No. 3VA9604-0JC43
Each (In a Pack of 4)
HK$782.75
Temporarily out of stock
Siemens SENTRON Connection Unit for use with 3VA15/25 1000
  • RS Stock No. 269-7225
  • Mfr. Part No. 3VA9603-0QB00
Each (In a Pack of 3)
HK$351.933
In Stock
Eaton 160A Solid Link for NH Fuses
  • RS Stock No. 255-347
  • Mfr. Part No. 263114 Z-NH-00/TR
1 Pack of 3
HK$366.90
Temporarily out of stock
Siemens SENTRON Cover Frame for use with 3VA52, 3VA61/62
  • RS Stock No. 161-960
  • Mfr. Part No. 3VA9144-0SB10
Each
HK$356.20
Temporarily out of stock
Schneider Electric Acti9 iC60H MCB, 4P, 2A Curve C, 415V AC, 250V DC, 70 kA Breaking Capacity
  • RS Stock No. 654-796
  • Mfr. Part No. A9F53402
Each
HK$2,540.70
In Stock
Better World
Siemens SENTRON 5SY4 MCB, 1P, 13A Curve B, 10 kA Breaking Capacity
  • RS Stock No. 202-7201
  • Mfr. Part No. 5SY4113-6
Each
HK$61.80
Temporarily out of stock
Phoenix Contact SOL-SC Wall Box, 20 A
  • RS Stock No. 239-5117
  • Mfr. Part No. 2404295
Each
HK$2,866.50
Temporarily out of stock
Better World
Siemens, Sentron MCCB Molded Case Circuit Breaker 4P 40A, Breaking Capacity 2.5 kA
  • RS Stock No. 245-511
  • Mfr. Part No. 3VA6140-7HL41-2AA0
Each
HK$13,369.50
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