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

95 of 999+
In Stock
Better World
Schneider Electric Multi 9 C60SP MCB, 1P, 13A Curve C, 415V AC, 60V DC, 20 kA Breaking Capacity
  • RS Stock No. 211-2358
  • Mfr. Part No. M9F22113
Each
HK$137.90
In Stock
RS PRO 5A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 413-226
Each (In a Pack of 10)
HK$6.77
Temporarily out of stock
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 4P 400A, Breaking Capacity 9 kA, Withdrawable
  • RS Stock No. 231-411
  • Mfr. Part No. 113580 NZMH3-4-A400-AVE
Each
HK$36,728.46
Temporarily out of stock
ABB S301 MCB, 1P, 16A Curve B, 415V AC, 125V DC, 100 kA Breaking Capacity
  • RS Stock No. 200-732
  • Mfr. Part No. 2CDS381001R0165
Each
HK$1,046.63
Temporarily out of stock
Eaton xEffect FAZ MCB, 3P, 1.5A Curve B, 415V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 247-878
  • Mfr. Part No. 132713 FAZ-B1,5/3-NA
Each
HK$1,534.62
Temporarily out of stock
ABB PBSC 3, 3+N Phase Busbar
  • RS Stock No. 201-493
  • Mfr. Part No. 1STQ007425A0000
Each
HK$25,291.86
In Stock
Bourns 0.75A Resettable Fuse, 24V
  • RS Stock No. 647-8184P
  • Mfr. Part No. MF-MSMF075/24-2
Each (Supplied on a Reel)
HK$2.84
In Stock
Schurter 12A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 703-2666
  • Mfr. Part No. 8020.0603.G
Each (In a Pack of 10)
HK$9.38
In Stock
Schneider Electric Acti 9 Spacer for use with C120/C60 Miniature Circuit Breakers, Clario/Librio/ProDis Circuit
  • RS Stock No. 776-2819
  • Mfr. Part No. A9N27062
Each
HK$24.20
Temporarily out of stock
Schneider Electric Acti9 iID RCCB, 100A, 2 Pole, 240V
  • RS Stock No. 207-171
  • Mfr. Part No. A9R14291
Each
HK$1,989.27
Temporarily out of stock
Better World
Schneider Electric Acti 9 iC60H MCB, 3P, 40A Curve C, 440V AC, 180V DC, 10 kA Breaking Capacity
  • RS Stock No. 776-3294
  • Mfr. Part No. A9F87340
Each
HK$2,723.13
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 800A, Breaking Capacity 30 kA, Fixed Mount
  • RS Stock No. 432-856
  • Mfr. Part No. C080N32EFM
Each
HK$77,155.72
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.25kA Ekip Hi-Touch LSI, 4 channels
  • RS Stock No. 259-4560
  • Mfr. Part No. 1SDA072808R1
Each
HK$72,992.50
In Stock
SIBA SMD Non Resettable Fuse 100mA, 250V
  • RS Stock No. 736-2601P
  • Mfr. Part No. 160000.0,1
Each (Supplied on a Reel)
HK$70.32
Temporarily out of stock
Siemens SENTRON Option Plug
  • RS Stock No. 277-0904
  • Mfr. Part No. 3WA9111-0EB10
Each
HK$1,649.20
In Stock
Mersen 4A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 188-6962
  • Mfr. Part No. X213598
Each (In a Pack of 10)
HK$11.98
In Stock
TE Connectivity Thermal Circuit Breaker - W28 Single Pole 32 V dc, 250V ac Voltage Rating, 750mA Current Rating
  • RS Stock No. 782-6590
  • Mfr. Part No. W28-XQ1A-0.75
Each
HK$52.50
Temporarily out of stock
Siemens 25A Cartridge Fuse, 10 x 38mm
  • RS Stock No. 232-2024
  • Mfr. Part No. 3NW1250-0HG
Each (In a Pack of 10)
HK$236.03
Temporarily out of stock
Siemens SENTRON Adapter for use with 3VA12/20/21/22/52/61/62
  • RS Stock No. 157-998
  • Mfr. Part No. 8US1213-4AP03
Each
HK$1,485.30
Temporarily out of stock
Eaton Eaton Moeller NZM Door Coupling Handle for use with N(S)2, NZM2
  • RS Stock No. 243-479
  • Mfr. Part No. 100684 NZM2-XTVDV-NA
Each
HK$1,060.28
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