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

46833 Products showing for Fuses & Circuit Breakers

2222 of 999+
ABB F200 RCCB, 40A, 2 Pole, 30mA, Type A, 230V ac
  • RS Stock No. 231-9899
  • Mfr. Part No. 2CSF202101R1400 F202 A-40/0.03
1 Box of 1
HK$1,630.50
Eaton xEffect FAZ MCB, 4P, 15A Curve D, 240V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 239-791
  • Mfr. Part No. 190836 FAZ-D15/4-NA
Each
HK$2,613.50
ABB S402M MCB, 2P, 16A Curve B, 12V AC, 10 kA Breaking Capacity
  • RS Stock No. 140-308
  • Mfr. Part No. 2CCS572001R0165
Each
HK$1,282.79
Eaton 400A NH Fuse, NH3, 690V ac
  • RS Stock No. 181-8644
  • Mfr. Part No. 400NHG3B-690
Each
HK$267.28
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 250A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 260-480
  • Mfr. Part No. 3VA6225-7JT41-2AA0
Each
HK$28,206.70
RS PRO 4A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 610-9995
Each (In a Pack of 10)
HK$3.27
Better World
ABB, Tmax XT MCCB 4P 25A, Fixed Mount
  • RS Stock No. 236-6503
  • Mfr. Part No. 1SDA067960R1 XT2L 160 Ekip LSI 25A FF
Each
HK$12,948.20
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 4P 125A, Breaking Capacity 4 kA, Plug In
  • RS Stock No. 229-544
  • Mfr. Part No. 113231 NZMC2-4-A125-SVE
Each
HK$11,551.47
Schneider Electric ComPacT New Generation Trip Unit for use with ComPacT NSX100 Circuit Breakers
  • RS Stock No. 260-9383
  • Mfr. Part No. C104TM016
Each
HK$3,295.95
FUSE 250V IEC FA LBC TR5 SL 4A
  • RS Stock No. 565-386
  • Mfr. Part No. 37014000430
Each
HK$1,332.68
Schneider Electric MasterPact Door for use with MasterPact MTZ1 Circuit Breaker
  • RS Stock No. 288-1515
  • Mfr. Part No. LV833857SP
Each
HK$1,434.30
Eaton xEffect FAZ MCB, 1P, 32A Curve D, 240V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 240-470
  • Mfr. Part No. 102114 FAZ-D32/1-NA
Each
HK$627.80
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 150A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 270-009
  • Mfr. Part No. 3VA6115-7JT31-0AA0
Each
HK$20,089.50
ABB System Pro M Compact S300P MCB, 3+N, 8A, Type Z, 415V AC, 25 kA Breaking Capacity
  • RS Stock No. 203-799
  • Mfr. Part No. 2CDS383103R0408
Each
HK$5,604.22
Lovato RCBO, 32A Current Rating, 1P + N Poles, 30mA Trip Sensitivity, Type A, P1RE1NC Range
  • RS Stock No. 276-5685
  • Mfr. Part No. P1RE1NC32A030
Each
HK$1,455.85
Mersen 35A Tag Fuse, 78 x 52 x 21mm, 500V ac
  • RS Stock No. 244-8523
  • Mfr. Part No. C211947C
1 Box of 3
HK$123.92
Siemens SENTRON Connection Kit
  • RS Stock No. 277-0844
  • Mfr. Part No. 3WA9111-0AX31
Each
HK$2,104.80
Better World
Schneider Electric Acti 9 iC60H MCB, 1P, 25A Curve B, 230V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 776-2095
  • Mfr. Part No. A9F06125
Each
HK$171.01
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-4031
  • Mfr. Part No. 3VA2110-8JP32-0AA0
Each
HK$18,096.90
Mersen 8A Glass Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 136-0535
  • Mfr. Part No. HP10M8
Each (In a Box of 10)
HK$92.551
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