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

49110 Products showing for Fuses & Circuit Breakers

104 of 999+
Temporarily out of stock
Phoenix Contact Surge Protector
  • RS Stock No. 269-8072
  • Mfr. Part No. 1182566
Each
SGD337.68(exc. GST)
In Stock
Better World
Schneider Electric, PowerLogic, 63A, Energy Sensor, 2VA, Wired
  • RS Stock No. 256-4049
  • Mfr. Part No. A9MEM1572
Each
SGD721.74(exc. GST)
In Stock
ETA Thermal Circuit Breaker - 1410-F Single Pole 240V Voltage Rating Panel Mount, 5A Current Rating
  • RS Stock No. 409-839
  • Mfr. Part No. 1410-F110-P1F1-W14QB4-5A
Each
SGD37.59(exc. GST)
In Stock
Better World
Schneider Electric Multi 9 MCB Mini Circuit Breaker, 3P, 15A Curve C, 277V AC
  • RS Stock No. 256-6807
  • Mfr. Part No. M9F52315
Each
SGD430.19(exc. GST)
In Stock
Hager 3 Phase Busbar
  • RS Stock No. 144-4832
  • Mfr. Part No. KB463A
Each
SGD64.38(exc. GST)
In Stock
Socomec 50A Rail Mount Fuse Holder for 14 x 51mm Fuse, 3P, 690V
  • RS Stock No. 233-3328
  • Mfr. Part No. 57025003
Each (In a Pack of 2)
SGD69.425(exc. GST)
Unavailable
Schneider Electric 690V ac Circuit Trip for use with Compact NSX 250 Circuit Breakers
  • RS Stock No. 219-9378
  • Mfr. Part No. LV431496
Each
SGD2,730.95(exc. GST)
In Stock
SIBA 2A F Glass Cartridge Fuse, 5 x 30mm
  • RS Stock No. 361-8187
  • Mfr. Part No. 171530.2
Each (In a Pack of 10)
SGD4.562(exc. GST)
In Stock
Mersen 400A NH Fuse, NH2, 500V ac
  • RS Stock No. 136-0611
  • Mfr. Part No. T200807 / NH2GG50V400-1
Each
SGD52.91(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB 4P 225A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 147-808
  • Mfr. Part No. 3VA5222-6EC41-0AA0
Each
SGD2,479.34(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB 4P 225A, Breaking Capacity 7 kA, Fixed Mount
  • RS Stock No. 147-804
  • Mfr. Part No. 3VA5222-5GD41-2AA0
Each
SGD2,910.35(exc. GST)
In Stock
RS PRO 6.3A Inline Fuse Holder for 5 x 20mm Fuse, 1P, 250V ac
  • RS Stock No. 277-3920
Each (In a Pack of 5)
SGD1.108(exc. GST)
In Stock
Littelfuse SMD Non Resettable Fuse 3A, 125V ac/dc
  • RS Stock No. 541-3417
  • Mfr. Part No. 0451003.MRL
Each (In a Pack of 10)
SGD1.947(exc. GST)
In Stock
Littelfuse Polyamide Panel Mount Fuse Cover for 6.3 x 32mm Fuse, IP40
  • RS Stock No. 769-0158
  • Mfr. Part No. 81600000005
Each (In a Pack of 5)
SGD1.532(exc. GST)
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 1P, 63A Curve C, 100 → 133V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3310
  • Mfr. Part No. A9F54163
Each
SGD61.93(exc. GST)
In Stock
Better World
RS PRO 15A F Ceramic Cartridge Fuse, 10 x 85mm
  • RS Stock No. 239-4976
Each (In a Pack of 10)
SGD25.453(exc. GST)
In Stock
Eaton 80A Centred Tag Fuse, NH000, 500V ac
  • RS Stock No. 703-8658
  • Mfr. Part No. 80NHG000B
Each
SGD13.23(exc. GST)
In Stock
Littelfuse 1.6A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 769-0010
  • Mfr. Part No. 021501.6MXP
Each (In a Pack of 25)
SGD1.529(exc. GST)
Temporarily out of stock
LV HRC fuse link 3NA COM with metering f
  • RS Stock No. 269-7029
  • Mfr. Part No. 3NA3236-4KK03
Each
SGD944.57(exc. GST)
In Stock
ABB RCBO, 6A Current Rating, 2P Poles, 30mA Trip Sensitivity
  • RS Stock No. 231-9921
  • Mfr. Part No. 2CSR255080R1064 DS201 C6 AC30
1 Box of 1
SGD259.77(exc. GST)
1
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