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

47266 Products showing for Fuses & Circuit Breakers

30 of 999+
Temporarily out of stock
Legrand Bell Transformer for use with Bell
  • RS Stock No. 266-1381
  • Mfr. Part No. 413091
Each
HK$1,785.77
Limited stock
Limitor Thermal Fuse +115°C 3 A, 250V ac
  • RS Stock No. 124-5058
  • Mfr. Part No. A2-3AF
Each (In a Pack of 5)
HK$6.44
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 630A Ekip G Touch LSIG, 4 channels
  • RS Stock No. 259-3413
  • Mfr. Part No. 1SDA071347R1
Each
HK$82,579.25
In Stock
Schneider Electric Acti9 Remote Control System for use with iC60 Circuit Breakers
  • RS Stock No. 276-1538
  • Mfr. Part No. A9C70124
Each
HK$4,971.00
In Stock
Lovato ModuLo P1MB MCB, 4P, 32A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 825-5977
  • Mfr. Part No. P1MB4PC32
Each
HK$942.50
In Stock
Better World
Siemens SENTRON 5SL6 MCB, 1+N, 16A Curve C, 230V AC, 72V DC
  • RS Stock No. 213-1055
  • Mfr. Part No. 5SL6516-7
Each
HK$418.40
Temporarily out of stock
ABB Tmax XT Shunt Opening Release for use with XT1, XT4
  • RS Stock No. 237-6050
  • Mfr. Part No. 1SDA066327R1 SOR-C XT1..XT4 F/P 480-525
Each
HK$982.60
In Stock
ABB RCBO, 32A Current Rating, 4P Poles, Type B
  • RS Stock No. 237-5103
  • Mfr. Part No. 2CSR254001R1325
Each
HK$2,946.60
In Stock
ETI 10A DII Diazed Fuse, E27 Thread Size, gG - gL, 500V ac
  • RS Stock No. 413-658
  • Mfr. Part No. 2312404
Each (In a Pack of 5)
HK$7.40
Temporarily out of stock
Siemens SENTRON 3VA9 Wire Connector for use with 3VA1 250
  • RS Stock No. 218-1829
  • Mfr. Part No. 3VA9253-0JC22
Each
HK$752.40
In Stock
Schneider Electric Thermal Circuit Breaker - GB2 Single Pole 277V ac Voltage Rating DIN Rail Mount, 2A Current Rating
  • RS Stock No. 312-3645
  • Mfr. Part No. GB2CB07
Each
HK$229.60
Temporarily out of stock
Better World
Siemens, SENTRON Circuit breaker 3P 400A, DIN Rail Mount
  • RS Stock No. 224-7909
  • Mfr. Part No. 3VA1440-6MH32-0AA0
Each
HK$14,506.70
Temporarily out of stock
ABB Conversion Kit for use with SACE Tmax XT
  • RS Stock No. 192-0870
  • Mfr. Part No. 1SDA066278R1
Each
HK$558.84
In Stock
Siemens 25A Bottle Fuse Holder, 500V ac
  • RS Stock No. 202-7149
  • Mfr. Part No. 5SH112
Each (In a Pack of 50)
HK$9.362
Temporarily out of stock
Siemens SENTRON 5SP MCB, 3P, 100A Curve C
  • RS Stock No. 232-2280
  • Mfr. Part No. 5SP4391-7
Each
HK$2,696.30
Temporarily out of stock
HENSEL ENYMOD Distribution Board
  • RS Stock No. 117-096
  • Mfr. Part No. Mi 1448
Each
HK$4,681.80
In Stock
Europa RCBO, 16A Current Rating, 2P Poles, 30mA Trip Sensitivity, Type A, EUBLMC Range
  • RS Stock No. 210-4729
  • Mfr. Part No. EUBLMC16B30A
Each
HK$637.20
Last RS stock
RS PRO SMD Non Resettable Fuse 30A, 125V
  • RS Stock No. 182-4060
Each (In a Pack of 5)
HK$12.16
Temporarily out of stock
Better World
Siemens RCBO, 10A Current Rating, 2P Poles, Type AC, Sentron Range
  • RS Stock No. 196-3611
  • Mfr. Part No. 5SU13531KL10
Each
HK$1,708.30
In Stock
Littelfuse 10A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-4533
  • Mfr. Part No. 0218010.MXP
Each (In a Pack of 10)
HK$9.35
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