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

73 of 999+
Deltron Earthing Strap
  • RS Stock No. 181-1267
  • Mfr. Part No. 4ELM6
Each
HK$40.10
Phoenix Contact Busbar
  • RS Stock No. 290-1258
  • Mfr. Part No. 0402174
Each
HK$197.60
ABB F200 RCCB, 100A, 4 Pole, 300mA, Type A, 230V ac
  • RS Stock No. 225-6136
  • Mfr. Part No. 2CSF204101R3900 F204 A-100/0,3
Each
HK$2,535.40
Schneider Electric EasyPact Electronic Circuit Breaker 400A, Fixed
  • RS Stock No. 122-446
  • Mfr. Part No. LV540336
Each
HK$7,199.99
RS PRO Residential RCCBs, 25A, 4 Pole, 30mA, Type A, 400V
  • RS Stock No. 284-2372
Each
HK$539.74
Omron Busbar
  • RS Stock No. 111-3543
  • Mfr. Part No. PYDN-15.5-080R
Each
HK$22.90
Eaton MEMShield MCB, 1P, 40A Curve B, 230V AC, 48V DC, 10 kA Breaking Capacity
  • RS Stock No. 124-3027
  • Mfr. Part No. EMBH140 EMBH140
Each
HK$229.70
Eaton 315mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 537-8651
  • Mfr. Part No. S506-315-R
Each (In a Pack of 10)
HK$2.08
Legrand DX3 RCD, 20A, 1+N Pole, 30mA, Type C
  • RS Stock No. 731-9893
  • Mfr. Part No. 4 108 02
Each
HK$3,515.32
Europa EUC1P EUB MCB, 1P, 10A Curve B, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 849-6468
  • Mfr. Part No. EUC1P10B
Each
HK$64.50
Better World
Siemens Sentron 5SV6 MCB, 2P, 6A, 230V AC, 6 kA Breaking Capacity
  • RS Stock No. 209-7508
  • Mfr. Part No. 5SV6016-6GV06
Each (In a Pack of 12)
HK$1,553.933
RS PRO 10A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 611-0024
Each (In a Pack of 10)
HK$3.37
Limitor Thermal Fuse +80°C 2.5 A, 250V ac
  • RS Stock No. 204-7427
  • Mfr. Part No. Q82 A 80 05 100
Each
HK$37.50
ABB AC Switch Disconnectors Accessories Phase Barrier for use with Low-Voltage Switch Technology
  • RS Stock No. 259-9697
  • Mfr. Part No. 1SCA100768R1001
Each
HK$792.07
Better World
Siemens, SENTRON MCCB 4P 125A, Breaking Capacity 36 kA
  • RS Stock No. 209-6756
  • Mfr. Part No. 3VA1112-4EF46-0AA0
Each
HK$9,114.40
Schneider Electric Vigi IC60 RCCB, 63A, 3 Pole, 30mA, Type A-SI, 400V ac
  • RS Stock No. 276-1542
  • Mfr. Part No. A9V31363
Each
HK$8,241.05
Wickmann SMD Non Resettable Fuse 10A, 63V
  • RS Stock No. 174-0752
  • Mfr. Part No. 0458010.DR
Each (In a Pack of 5)
HK$15.26
Eaton 10A F Glass Cartridge Fuse, 6.3 x 25mm
  • RS Stock No. 849-5614
  • Mfr. Part No. AGX-10
Each
HK$9.20
Eaton 24A Inline Fuse Holder, 32V dc
  • RS Stock No. 852-7279
  • Mfr. Part No. HHG
Each
HK$94.90
Siemens SENTRON Communication Module for use with 3VA2 400/630/1000
  • RS Stock No. 210-9384
  • Mfr. Part No. 3VA9387-0TB50
Each
HK$788.80
1
73
2364
Results per page

Related links