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

112 of 999+
Mersen 20A F GMG Cartridge Fuse, 10 x 38mm
  • RS Stock No. 914-4360
  • Mfr. Part No. ATM20
Each
HK$68.50
Eaton 125A Tag Fuse, 415V ac, 94mm
  • RS Stock No. 228-793
  • Mfr. Part No. DEO125
1 Pack of 5
HK$3,515.50
Eaton 1A gG/gL Cartridge Fuse, 10 x 38mm
  • RS Stock No. 228-660
  • Mfr. Part No. C10G1 CYLINDRICAL FUSE 10 x 38 1A GG 500V AC
1 Pack of 10
HK$106.70
RS PRO SMD Non-Resettable Surface Mount Fuse 2.5A, 63V
  • RS Stock No. 252-2195
Each (On a Tape of 4000)
HK$1.101
20A Cartridge Fuse, 51 x 537mm
  • RS Stock No. 262-745
  • Mfr. Part No. 36TDQSJ20
Each
HK$2,977.00
Better World
Siemens SENTRON 5SY6 MCB, 3+N, 13A Curve C, 400V AC, 72V DC, 5 kA Breaking Capacity
  • RS Stock No. 213-1088
  • Mfr. Part No. 5SY6613-7
Each
HK$1,196.00
Better World
Siemens, Sentron MCCB Molded Case Circuit Breaker 3P 100A, Breaking Capacity 3 kA
  • RS Stock No. 245-481
  • Mfr. Part No. 3VA6210-5KL31-2AA0
Each
HK$31,094.40
ABB System Pro M Compact S200 MCB, 2P, 6A Curve D, 230V AC, 125V DC, 20 kA Breaking Capacity
  • RS Stock No. 191-9449
  • Mfr. Part No. 2CDS252001R0061 S202-D6
Each
HK$662.43
Siemens SENTRON Wire Connector for use with 3VA5 125
  • RS Stock No. 269-7102
  • Mfr. Part No. 3VA9134-0JG11
Each (In a Pack of 4)
HK$124.825
Better World
Schneider Electric iID RCCB, 100A, 4 Pole, 300mA, Type A-SI, 415V ac
  • RS Stock No. 248-3699
  • Mfr. Part No. A9R34491
Each
HK$4,063.60
Better World
Schneider Electric MCB
  • RS Stock No. 776-3644
  • Mfr. Part No. A9N61690
Each
HK$1,242.57
Schneider Electric IKQ RCD, 63A, 4 Pole, 300mA, 415V ac
  • RS Stock No. 339-650
  • Mfr. Part No. SED63304
Each
HK$2,471.58
Schneider Electric Multi 9 Multi9 MCB, 3P, 63A, 240V AC, 10 kA Breaking Capacity
  • RS Stock No. 119-431
  • Mfr. Part No. M9F52363
Each
HK$4,415.90
Schneider Electric Multi9 M9F MCB, 2P, 8A Curve D, 240V AC, 125V DC, 14 kA Breaking Capacity
  • RS Stock No. 288-1399
  • Mfr. Part No. M9F23208
Each
HK$1,767.90
Siemens SENTRON 5SY Circuit Breaker, 3P+N, 63A Curve D, 440V AC, 60V DC, 20 kA Breaking Capacity
  • RS Stock No. 664-338
  • Mfr. Part No. 5SY8663-8
Each
HK$5,696.51
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
Mersen 32A Neutral Link for A1 Fuses
  • RS Stock No. 178-1170
  • Mfr. Part No. F239136 / BNEUTRALA1
Each (In a Pack of 10)
HK$14.935
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 147-661
  • Mfr. Part No. 3VA5210-7GC41-0AA0
Each
HK$10,020.80
Better World
Schneider Electric Acti 9 iC60H MCB, 2P, 16A Curve B, 440V AC, 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 776-2112
  • Mfr. Part No. A9F06216
Each
HK$487.40
Bourns 1.75A Resettable Fuse, 6V
  • RS Stock No. 245-9194P
  • Mfr. Part No. MF-NSMF175-2
Each (Supplied on a Reel)
HK$4.87
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