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

47025 Products showing for Fuses & Circuit Breakers

2326 of 999+
Littelfuse 500mA F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-4347
  • Mfr. Part No. 0217.500MXP
Each (In a Pack of 10)
HK$2.66
Better World
Siemens SENTRON MCB, 1P, 10A Curve B, 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 189-3187
  • Mfr. Part No. 5SL6110-6
Each
HK$60.20
Schurter Thermal Circuit Breaker - T11 Single Pole 240V ac Voltage Rating, 10A Current Rating
  • RS Stock No. 284-5877
  • Mfr. Part No. 4400.0003
Each
HK$84.50
Eaton 2A Bolted Tag Fuse, A2, 250 V dc, 660V ac, 71.5mm
  • RS Stock No. 182-1782
  • Mfr. Part No. 2H07-660
Each
HK$760.20
Eaton xEffect - FRCmM RCCB, 16A, 4 Pole, 100mA, 240/415V ac
  • RS Stock No. 123-567
  • Mfr. Part No. 170299 FRCMM-16/4/01-G/A
Each
HK$3,168.43
Better World
ABB System Pro M Compact S200 MCB, 4P, 4A Curve D, 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 746-7902
  • Mfr. Part No. 2CDS254001R0041 S204-D4
Each
HK$1,940.15
Schurter Thermal Circuit Breaker - T12 Single Pole 240V ac Voltage Rating, 4A Current Rating
  • RS Stock No. 284-6088
  • Mfr. Part No. 4410.0076
Each
HK$193.70
Socomec 25A F Cartridge Fuse, 10 x 38mm
  • RS Stock No. 223-2796
  • Mfr. Part No. 60130025
Each (In a Pack of 10)
HK$11.35
RS PRO 5A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 668-5975
Each (In a Pack of 10)
HK$2.895
ABB RCBO, 10A Current Rating, 2P Poles, 300mA Trip Sensitivity, System Pro M Compact Range
  • RS Stock No. 201-6939
  • Mfr. Part No. 2CSR255080R3104 DS201 C10 AC300
Each
HK$1,082.98
Eaton xEffect FAZ MCB, 1P, 13A Curve B, 250V DC, 10 kA Breaking Capacity
  • RS Stock No. 244-686
  • Mfr. Part No. 176068 FAZ-B13/1-DC
Each
HK$1,004.48
ABB Emax2 Electronic Circuit Breaker 1.25kA 1SDA07, 4 channels
  • RS Stock No. 259-4565
  • Mfr. Part No. 1SDA072812R1
Each
HK$45,746.60
Better World
Siemens SENTRON 5SY4 MCB, 3P, 80A Curve C, 400V AC, 72V DC, 5 kA Breaking Capacity
  • RS Stock No. 212-8952
  • Mfr. Part No. 5SY4380-7
Each
HK$2,503.20
Siemens SENTRON Busbar, 690V
  • RS Stock No. 265-560
  • Mfr. Part No. 8US1921-2BB01
1 Pack of 15
HK$705.30
ABB, Tmax XT MCCB 4P 1.6kA, Fixed Mount
  • RS Stock No. 236-6881
  • Mfr. Part No. 1SDA101117R1 XT7S1600 EkipDip LS/I 4pFF
Each
HK$53,177.62
Eaton xEffect MCB, 3P, 32A Curve D, 240 → 415V AC, 96V DC, 10 kA Breaking Capacity
  • RS Stock No. 922-7147
  • Mfr. Part No. 279001 FAZ-D32/3N
Each
HK$1,407.20
Better World
Siemens, SENTRON MCCB 3P 63A, Breaking Capacity 85 kA
  • RS Stock No. 209-6904
  • Mfr. Part No. 3VA2063-6KP32-0AA0
Each
HK$11,983.80
Mersen 3.15A Quick Acting Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 630-811
  • Mfr. Part No. G095571Q
1 Box of 10
HK$96.67
Bourns SMD Non Resettable Fuse 750mA, 125V ac
  • RS Stock No. 191-4551
  • Mfr. Part No. SF-2410HI075T-2
Each (On a Tape of 10)
HK$5.84
Mersen 8A Slow-Blow Ceramic Cartridge Fuse, 14 x 51mm
  • RS Stock No. 247-2843
  • Mfr. Part No. N222215
1 Box of 10
HK$786.77
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