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

2232 of 999+
In Stock
Eaton 63A British Standard Fuse, A3, 550V ac, 73.5mm
  • RS Stock No. 413-383
  • Mfr. Part No. BAO63
Each
HK$100.00
In Stock
Better World
Schneider Electric Acti 9 iC60N MCB, 4P, 6A Curve C, 440V AC, 250V DC, 6 kA Breaking Capacity
  • RS Stock No. 776-3521
  • Mfr. Part No. A9F77406
Each
HK$1,941.04
Temporarily out of stock
ABB Tmax XT Trip Unit for use with Tmax XT
  • RS Stock No. 236-7301
  • Mfr. Part No. 1SDA067475R1 TMA 100-1000 XT4 4p
Each
HK$5,156.70
In Stock
Better World
Schneider Electric Acti 9 Acti9 iDT40N MCB, 1P, 4A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 191-6105
  • Mfr. Part No. A9P24604
Each
HK$844.90
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 4kA Ekip Dip LSI, 4 channels
  • RS Stock No. 259-3817
  • Mfr. Part No. 1SDA071832R1
Each
HK$241,148.57
Temporarily out of stock
Eaton xEffect MCB, 4P, 4A Curve D
  • RS Stock No. 230-1051
  • Mfr. Part No. 177607 FAZ6-D4/4
Each
HK$1,572.28
Temporarily out of stock
Eaton RCBO, 10A Current Rating, 2P Poles, 30mA Trip Sensitivity, Type A, Type C, FRBDM Range
  • RS Stock No. 120-978
  • Mfr. Part No. 168202 FRBDM-C10/2/003-G/A
Each
HK$1,684.12
Temporarily out of stock
Eaton IZMX/INX Electronic Circuit Breaker 1.25kA , DIN Rail
  • RS Stock No. 132-768
  • Mfr. Part No. 183920 IZMX40B4-V12W-1
Each
HK$83,914.90
Currently unavailable
ABB 2CCS MCB, 3P, 125A, 50 KA Breaking Capacity
  • RS Stock No. 140-261
  • Mfr. Part No. 2CCS863001R1845
Each
HK$9,692.92
In Stock
Schurter 5A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 870-1647
  • Mfr. Part No. 7010.3480
Each (In a Pack of 10)
HK$22.55
Temporarily out of stock
Better World
Schneider Electric Multi 9 MCB Mini Circuit Breaker, 3P, 2A Curve D, 277V AC
  • RS Stock No. 256-6820
  • Mfr. Part No. M9F53302
Each
HK$3,163.70
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 12.5A, Fixed Mount
  • RS Stock No. 260-9458
  • Mfr. Part No. C10H3MA013
Each
HK$6,744.40
Temporarily out of stock
ABB System Pro M Compact SU200 MR Circuit Breaker, 3P, 32A Curve K, 400V AC, 15 kA Breaking Capacity
  • RS Stock No. 200-846
  • Mfr. Part No. 2CDS273347R0537
Each
HK$4,682.90
In Stock
RS PRO 16A F Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 209-9298
Each (In a Pack of 10)
HK$8.15
In Stock
Siemens RCBO, 63A Current Rating, 4P Poles, 300mA Trip Sensitivity, SENTRON Range
  • RS Stock No. 211-9586
  • Mfr. Part No. 5SM2646-6
Each
HK$1,230.50
In Stock
Europa EUC1P EUC MCB, 1P, 2A Curve C, 230V AC, 10 kA Breaking Capacity
  • RS Stock No. 849-6496
  • Mfr. Part No. EUC1P2C
Each
HK$67.30
Temporarily out of stock
Eaton Distribution Parts 1 Phase Busbar, 415V
  • RS Stock No. 255-908
  • Mfr. Part No. 264917 Z-SV-10/N-1TE/13
1 Pack of 10
HK$285.80
Temporarily out of stock
Eaton Fuse Holder Cover
  • RS Stock No. 246-250
  • Mfr. Part No. 1319417 QSARCOVER400-800-C3/3
Each
HK$1,395.11
In Stock
ETA Thermal Circuit Breaker - 1110 Single Pole 250V Voltage Rating Panel Mount, 1A Current Rating
  • RS Stock No. 416-950
  • Mfr. Part No. 1110-F112-P1M1-1A
Each
HK$211.30
In Stock
ABB 6 Way Split Load Steel Consumer Unit, IP41
  • RS Stock No. 246-1869
  • Mfr. Part No. 1SKB106142C2001
Each
HK$863.90
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