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

67 of 999+
Better World
Siemens SENTRON 5SL4 MCB, 2P, 10A Curve C, 400V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 209-5966
  • Mfr. Part No. 5SL4210-7
Each
HK$688.30
Wickmann 60A Bolt Down Car Fuse, 32V dc
  • RS Stock No. 174-0212
  • Mfr. Part No. 0298060.ZXB
Each (In a Box of 500)
HK$49.088
ABB High Performance S800C MCB, 3P, 100A Curve C, 690V AC, 50 kA Breaking Capacity
  • RS Stock No. 231-9580
  • Mfr. Part No. 2CCG001233R0001
Each
HK$1,671.10
Schneider Electric, Compact MCCB 3P 800A, Fixed Mount
  • RS Stock No. 247-1787
  • Mfr. Part No. 33380
Each
HK$32,908.50
Eaton 6.3A Panel Mount Fuse Holder for 5 x 20mm Fuse, 250V ac
  • RS Stock No. 310-9841
  • Mfr. Part No. HTC-30M
Each (In a Pack of 5)
HK$48.96
Better World
Schneider Electric iC60 RCD, 25A, 2 Pole, 30mA, Type AC, 230 → 240V ac
  • RS Stock No. 734-9071
  • Mfr. Part No. A9Q11225
Each
HK$2,090.50
TE Connectivity Thermal Circuit Breaker - W57 Single Pole 250V ac Voltage Rating, 5A Current Rating
  • RS Stock No. 782-7821
  • Mfr. Part No. W57-XB1A7A10-5
Each
HK$32.80
Lovato ModuLo P2MB MCB, 4P, 125A Curve C, 230V AC, 60V DC, 10 kA Breaking Capacity
  • RS Stock No. 825-6188
  • Mfr. Part No. P2MB4PC125
Each
HK$2,493.20
Phoenix Contact Electronic Circuit Breaker 4A 24V PTCB, DIN Rail Mount
  • RS Stock No. 201-3968
  • Mfr. Part No. 2909906
Each
HK$345.50
Better World
Siemens RCBO, 25A Current Rating, 2P Poles, 30mA Trip Sensitivity, SENTRON Range
  • RS Stock No. 211-9604
  • Mfr. Part No. 5SU1354-3KK25
Each
HK$2,142.80
Siemens SENTRON Nut Keeper Kit for use with 3VA1
  • RS Stock No. 269-7192
  • Mfr. Part No. 3VA9404-0QG00
Each (In a Pack of 4)
HK$187.825
RS PRO MCB, 2P, 16A Curve C, 240 → 415V AC, 6 kA Breaking Capacity
  • RS Stock No. 265-0173
Each
HK$166.10
Better World
Siemens 5SV3 RCCB, 40A, 4 Pole, 30mA, Type A, 400V
  • RS Stock No. 124-7721
  • Mfr. Part No. 5SV3344-6
Each
HK$1,531.40
RS PRO 5A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-3108
Each (In a Pack of 10)
HK$3.51
Siemens SENTRON Wire Connector With Control Wire Voltage Tap Off, For Use With 3VA1 400/630, 3VA2 400/630
  • RS Stock No. 226-2830
  • Mfr. Part No. 3VA9384-0JG13
Each
HK$1,250.00
Siemens SENTRON Mounting Plate for use with 3VA1 250
  • RS Stock No. 210-9320
  • Mfr. Part No. 3VA9211-0WK30
Each
HK$154.20
RS PRO 16A M Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 182-4018P
Each (Supplied in a Box)
HK$31.84
Phoenix Contact Electronic Circuit Breaker 1 → 6A 48V PTCB E1, 1 channels , DIN Rail
  • RS Stock No. 493-513
  • Mfr. Part No. 1471917
Each
HK$562.50
Siemens Fuse Puller Fuse Puller, Sizes 000 → 3in
  • RS Stock No. 282-4685
  • Mfr. Part No. 3NX1015
Each
HK$317.10
Better World
Siemens 5sV3 RCCB, 25A, 4 Pole, 30mA, Type A, 400V ac
  • RS Stock No. 211-9641
  • Mfr. Part No. 5SV3342-6KK03
Each
HK$2,432.00
1
67
2364
Results per page

Related links