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

66 of 999+
In Stock
ABB ZLS Universal Adapter for SMISSLINE TP System
  • RS Stock No. 231-9537
  • Mfr. Part No. 2CCA180556R0001 ZLS973
Each
HK$114.30
In Stock
Wickmann Fuse Holder Battery Clamp
  • RS Stock No. 342-0205
  • Mfr. Part No. 255.1000.0001
Each
HK$195.70
In Stock
Schurter 10A PCB Mount Fuse Holder for 5 x 20mm Fuse, 250V ac
  • RS Stock No. 384-106
  • Mfr. Part No. 3101.0055
Each (In a Pack of 5)
HK$27.50
In Stock
Eaton 10A Panel Mount Fuse Holder for 6.3 x 32mm Fuse, 250V ac
  • RS Stock No. 233-0581
  • Mfr. Part No. BK1-HTJ-605I
Each (In a Pack of 10)
HK$30.64
Temporarily out of stock
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 3P 630A, Breaking Capacity 6 kA, Plug In
  • RS Stock No. 248-993
  • Mfr. Part No. 191513 NZMS3-VX630-SVE
Each
HK$34,106.90
In Stock
Better World
Siemens SENTRON 5SL4 MCB, 1+N, 1A Curve B, 230V AC, 72V DC
  • RS Stock No. 209-7478
  • Mfr. Part No. 5SL4501-6
Each
HK$535.60
In Stock
ETI 4A DII Diazed Fuse, E27 Thread Size, gG - gL, 500V ac
  • RS Stock No. 413-636
  • Mfr. Part No. 2312402
Each (In a Pack of 5)
HK$12.60
In Stock
Schurter 16A Panel Mount Fuse Holder for 6.3 x 32, 5 x 20mm Fuse, 1P, 500V ac
  • RS Stock No. 866-3595
  • Mfr. Part No. 0031.2320
Each
HK$87.00
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 16A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 210-1684
  • Mfr. Part No. 3VA1196-4EE46-0AA0
Each
HK$4,550.50
Temporarily out of stock
Siemens SENTRON Busbar, 60mm Pitch
  • RS Stock No. 196-3721
  • Mfr. Part No. 8US19482AA00
Each
HK$6,728.50
In Stock
Better World
Schneider Electric Acti 9 iC60N MCB, 2P, 4A Curve C, 400V AC, 125V DC, 6 kA Breaking Capacity
  • RS Stock No. 734-9220
  • Mfr. Part No. A9F74204
Each
HK$1,133.40
In Stock
Omron Busbar
  • RS Stock No. 329-7320
  • Mfr. Part No. G78-16-P2RF-E
Each
HK$73.10
In Stock
ABB F200 RCCB, 63A, 4 Pole, 300mA, Type AC
  • RS Stock No. 537-7462
  • Mfr. Part No. 2CSF204001R3630 F204 AC-63/0,3
Each
HK$931.80
In Stock
Better World
Siemens Sentron 5SY6 MCB, 2P, 6A Curve C, 400V AC, 72V DC, 6 kA Breaking Capacity
  • RS Stock No. 196-3628
  • Mfr. Part No. 5SY6206-7
Each
HK$500.70
In Stock
Littelfuse 10A PCB Mount Fuse Holder for 5 x 20mm Fuse, 250V ac
  • RS Stock No. 787-4300
  • Mfr. Part No. 65600001009
Each (In a Pack of 5)
HK$11.12
In Stock
brennenstuhl 1 Phase Surge Protector, 16A, 230 V, Plug-On Mount
  • RS Stock No. 270-2252
  • Mfr. Part No. 1506951
Each
HK$168.50
Limited stock
Better World
Siemens SENTRON 5SY6 MCB, 1P, 6A Curve B, 440V AC, 6 kA Breaking Capacity
  • RS Stock No. 489-6530
  • Mfr. Part No. 5SY6106-6
Each
HK$133.30
In Stock
Rittal SZ Busbar
  • RS Stock No. 230-4854
  • Mfr. Part No. 2364000
Each
HK$1,205.20
In Stock
RS PRO 20A Inline Fuse Holder for ATO/ATC 19x18.6mm Fuse, 32V dc
  • RS Stock No. 237-5263
Each
HK$27.80
Temporarily out of stock
Siemens 4A Cartridge Fuse, 10 x 38mm
  • RS Stock No. 232-2044
  • Mfr. Part No. 3NW6004-4
Each (In a Pack of 20)
HK$170.235
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