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

99 of 999+
Better World
Schneider Electric GFP RCCB, 100A, 4 Pole, 260mA, Type A, 415V ac
  • RS Stock No. 214-2103
  • Mfr. Part No. M9R84491
Each
HK$10,249.00
ABB FH200 RCCB, 25A, 4 Pole, 300mA, Type AC
  • RS Stock No. 183-3638
  • Mfr. Part No. 2CSF204023R3250
Each
HK$1,471.25
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 4P 100A, Breaking Capacity 3 kA, Fixed Mount
  • RS Stock No. 251-846
  • Mfr. Part No. 193301 NZMN2-4-VX100-T
Each
HK$15,638.00
Schneider Electric, ComPacT MCCB 4P 800A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 432-855
  • Mfr. Part No. C080L450FM
Each
HK$113,771.18
Mersen 10A F GMG Cartridge Fuse, 10 x 38mm
  • RS Stock No. 914-4358
  • Mfr. Part No. ATM10
Each
HK$88.30
ABB S301 MCB, 1P, 1A Curve C, 415V AC, 125V DC, 100 kA Breaking Capacity
  • RS Stock No. 200-259
  • Mfr. Part No. 2CDS381001R0014
Each
HK$913.42
ABB F200 RCCB, 125A, 4 Pole, 500mA, Type B, 400V ac
  • RS Stock No. 176-9630
  • Mfr. Part No. F204B-125/0.5
Each
HK$52,365.25
Better World
ABB System Pro M Compact S200 MCB, 1P, 3A Curve K, 230V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 746-7946
  • Mfr. Part No. 2CDS251001R0317 S201-K3
Each
HK$263.40
ABB Emax2 Electronic Circuit Breaker 1.6kA Ekip Dip LSI, 4 channels
  • RS Stock No. 259-3534
  • Mfr. Part No. 1SDA071512R1
Each
HK$68,283.49
Eaton 25A Cartridge Fuse, 13 x 29mm
  • RS Stock No. 261-923
  • Mfr. Part No. SMD25
1 Pack of 20
HK$2,544.30
Eaton Fuse Holder Microswitch
  • RS Stock No. 182-1420
  • Mfr. Part No. MAI
Each
HK$1,797.40
Siemens 30A Rail Mount Fuse Holder for 10 x 38mm Fuse, 1P, 1kV
  • RS Stock No. 203-2114
  • Mfr. Part No. 3NW7013-4
Each (In a Pack of 12)
HK$142.308
ABB F200 RCCB, 80A, 4 Pole, 30mA, Type B, 400V ac
  • RS Stock No. 176-9625
  • Mfr. Part No. F204B-80/0.03
Each
HK$25,126.05
Schneider Electric R9F RCCB, 60A, 1 Pole, 500mA, Type A, 250V ac
  • RS Stock No. 276-8944
  • Mfr. Part No. R9FS660
Each
HK$2,441.58
ABB Emax 2, Tmax XT Signalling Module for use with Circuit Breaker
  • RS Stock No. 231-9321
  • Mfr. Part No. 1SDA074167R1 EKIP 2K-1 E1.2..E6.2-Tmax
Each
HK$1,460.00
Schneider Electric Mureva Enclosure
  • RS Stock No. 119-320
  • Mfr. Part No. 13163M
Each
HK$3,942.55
Limitor Thermal Fuse +80°C 2.5 A, 250V ac
  • RS Stock No. 204-7427
  • Mfr. Part No. Q82 A 80 05 100
Each
HK$37.50
RS PRO MCB, 2P, 10A Curve B, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 265-0159
Each
HK$188.70
Phoenix Contact 3 Phase Surge Protector, 2kV, DIN Rail Mount
  • RS Stock No. 890-3714
  • Mfr. Part No. 2905421
Each
HK$10,179.00
ABB System Pro M Compact S200M MCB, 1+N, 3A Curve C, 230V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 203-835
  • Mfr. Part No. 2CDS271103R0034
Each
HK$1,323.98
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