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

47290 Products showing for Fuses & Circuit Breakers

14 of 999+
ABB System Pro M Compact S200M MCB, 3P, 32A Curve D, 400V AC, 125V DC, 10 kA Breaking Capacity
  • RS Stock No. 746-8185
  • Mfr. Part No. 2CDS273001R0321 S203M-D32
Each
HK$834.50(exc. GST)
Better World
Schneider Electric Acti9 iID RCCB, 40A, 4 Pole, 30mA, 400V
  • RS Stock No. 218-3909
  • Mfr. Part No. A9Z51440
Each
HK$7,372.70(exc. GST)
Littelfuse 15A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 738-2829
  • Mfr. Part No. 0326015.MXP
Each (In a Pack of 10)
HK$11.53(exc. GST)
Legrand 5A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 266-3068
  • Mfr. Part No. 0 102 50
1 Box of 10
HK$144.90(exc. GST)
Mersen 10A Glass Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 136-0629
  • Mfr. Part No. HP10M10
Each
HK$117.30(exc. GST)
Littelfuse 1.1A Resettable Fuse, 6V dc
  • RS Stock No. 517-7262P
  • Mfr. Part No. MICROSMD110F-2
Each (Supplied on a Reel)
HK$2.465(exc. GST)
Eaton MCB Blanking Module for use with SPN, TPN, Type A Distribution Boards, Type B Distribution Boards
  • RS Stock No. 124-3030
  • Mfr. Part No. EMBP EMBP
Each
HK$21.60(exc. GST)
Better World
Schneider Electric Acti 9 iC60H MCB, 4P, 63A Curve C, 440V AC, 220 → 250V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3458
  • Mfr. Part No. A9F54463
Each
HK$1,886.70(exc. GST)
Better World
Schneider Electric Acti 9 1 Phase Busbar, 415V ac, 18mm Pitch
  • RS Stock No. 806-7228
  • Mfr. Part No. A9XPH112
Each
HK$165.10(exc. GST)
Better World
Schneider Electric Acti 9 Acti9 iDT40K MCB, 3P, 32A Curve C, 400V AC
  • RS Stock No. 239-9977
  • Mfr. Part No. A9P71732
Each
HK$1,136.60(exc. GST)
Better World
Siemens, SENTRON Circuit breaker 4P 160A, DIN Rail Mount
  • RS Stock No. 224-7905
  • Mfr. Part No. 3VA1216-5GF42-0AA0
Each
HK$11,352.60(exc. GST)
Better World
Schneider Electric Acti 9 1 Phase Busbar, 415V ac, 18mm Pitch
  • RS Stock No. 776-2711
  • Mfr. Part No. A9XPH106
Each
HK$89.10(exc. GST)
Eaton 200A Cartridge Fuse, 22 x 42mm
  • RS Stock No. 182-1445
  • Mfr. Part No. JJS-200
Each
HK$1,509.80(exc. GST)
Schneider Electric Acti 9 Cover for use with ARA, IC60, iDPN Vigi, iLD, iSW, ISW-NA, RCA, Reflex iC60
  • RS Stock No. 791-2773
  • Mfr. Part No. A9A26981
Each (In a Pack of 20)
HK$12.93(exc. GST)
ABB S800PV MCB, 2P, 6A Curve B, 800V DC, 5 kA Breaking Capacity
  • RS Stock No. 225-5963
  • Mfr. Part No. 2CCF019643R0001 S802PV-SP6 - 5 kA
Each
HK$1,614.50(exc. GST)
RS PRO Single Phase Industrial Surge Protector, 40kA, 0.9kV, DIN Rail Mount
  • RS Stock No. 101-798
Each
HK$706.70(exc. GST)
Schurter 10A T Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 209-9418
  • Mfr. Part No. 8020.2050
Each
HK$73.60(exc. GST)
Schneider Electric Acti9 A9F MCB Mini Circuit Breaker, 2P, 16A Curve C, 500V AC, 10 kA Breaking Capacity
  • RS Stock No. 653-861
  • Mfr. Part No. A9F74216
Each
HK$910.80(exc. GST)
Legrand 250A Cartridge Fuse, 65 x 134.5mm
  • RS Stock No. 266-3193
  • Mfr. Part No. 0 174 65
1 Box of 3
HK$2,219.54(exc. GST)
Mersen 25A Rail Mount Fuse Holder for 8 x 31mm Fuse, 3P+N, 400V ac
  • RS Stock No. 189-5330
  • Mfr. Part No. H1062676 / CMC83N
Each
HK$214.10(exc. GST)
Results per page
1
14
2365

Related links