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

92 of 999+
Eaton 450A Tag Fuse, 660V ac, 133/184mm
  • RS Stock No. 261-695
  • Mfr. Part No. TTM450
Each
HK$2,585.50
400A Tag Fuse, 54 x 150mm, 400V
  • RS Stock No. 262-748
  • Mfr. Part No. 400NHG03BI-400
1 Pack of 3
HK$649.00
Eaton 250A NH Fuse, NH1, 500V
  • RS Stock No. 703-8715P
  • Mfr. Part No. 250NHG1B
Each (Supplied in a Box)
HK$57.80
RS PRO 800mA T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 414-415
Each (In a Pack of 10)
HK$10.85
Eaton Mounting Plate
  • RS Stock No. 231-547
  • Mfr. Part No. 119381 NZM2-XAP7
Each
HK$1,283.50
200A Fuse Holder for 215 x 69 x 136mm Fuse, 1P, 690V ac
  • RS Stock No. 261-962
  • Mfr. Part No. RS200H
Each
HK$3,028.50
Schneider Electric MasterPacT Locking Kit for use with MasterPact NW
  • RS Stock No. 341-050
  • Mfr. Part No. 64928
Each
HK$3,549.33
Siemens SENTRON Connection Kit
  • RS Stock No. 277-0827
  • Mfr. Part No. 3WA9111-0AV28
Each
HK$4,574.00
Siemens SENTRON 5SJ4120 MCB, 1P, 20A Curve D, 400V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 299-895
  • Mfr. Part No. 5SJ4120-8HG42
Each
HK$492.20
Sensata Airpax Airpax Thermal Circuit Breaker - LEGF6 Single Pole Panel Mount, 10A Current Rating
  • RS Stock No. 275-0349
  • Mfr. Part No. LEGF6-1-62-10.0-A-01-V
1 Box of 5
HK$1,904.20
Siemens SENTRON Long Rear Connection for use with 3VA1 100/160
  • RS Stock No. 269-7067
  • Mfr. Part No. 3VA9113-0QF00
Each (In a Pack of 3)
HK$130.467
Siemens SENTRON Cable for use with 3VA
  • RS Stock No. 210-9423
  • Mfr. Part No. 3VA9987-0TF10
Each
HK$210.60
Siemens SENTRON Insulation accessory for use with 3VA13/14, 3VA23/24
  • RS Stock No. 158-041
  • Mfr. Part No. 3VA9481-0WK40
Each
HK$276.50
Bourns Single, Three Phase Surge Protector, 40kA, 2.5kV, DIN Rail Mount
  • RS Stock No. 287-9641
  • Mfr. Part No. 1250A-3S-600
Each
HK$2,490.40
Siemens SENTRON 3VA9 Wire Connector for use with 3VA2 100/160/250
  • RS Stock No. 218-1824
  • Mfr. Part No. 3VA9223-0JJ22
Each
HK$673.50
Siemens SENTRON Protective Cap for use with 3VA9603
  • RS Stock No. 269-7232
  • Mfr. Part No. 3VA9603-0WH05
Each (In a Pack of 3)
HK$125.20
Siemens 5SM26 RCCB, 63A, 3 Pole, 300mA, Type A, 400V
  • RS Stock No. 328-421
  • Mfr. Part No. 5SM2636-8
Each
HK$2,539.09
Better World
Schneider Electric Earthing Strap
  • RS Stock No. 219-8669
  • Mfr. Part No. NSYRBL216296M
Each (In a Pack of 10)
HK$553.129
Siemens SENTRON Wire Connector for use with 3VA5/6 400/600
  • RS Stock No. 269-7198
  • Mfr. Part No. 3VA9473-0JL23
Each (In a Pack of 3)
HK$2,285.50
Better World
Schneider Electric GFP RCCB, 100A, 4 Pole, 260mA, Type A, 415V ac
  • RS Stock No. 214-2103
  • Mfr. Part No. M9R84491
Each
HK$10,249.00
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