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

49 of 999+
Temporarily out of stock
Littelfuse 10A Panel Mount 5 x 20mm Cartridge Fuse Block, 300V ac/dc
  • RS Stock No. 878-4043
  • Mfr. Part No. 05200003Z
Each (In a Pack of 50)
SGD2.124(exc. GST)
Temporarily out of stock
Better World
Schneider Electric Acti 9 iC60H MCB, 4P, 40A Curve B, 440V AC, 220 → 250V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3269
  • Mfr. Part No. A9F53440
Each
SGD428.10(exc. GST)
Temporarily out of stock
ABB S803S MCB, 3P, 80A, UC-B, 750V DC, 50 kA Breaking Capacity
  • RS Stock No. 140-768
  • Mfr. Part No. 2CCS863001R1805
Each
SGD796.49(exc. GST)
In Stock
ABB High Performance S800C MCB, 2P, 80A Curve B
  • RS Stock No. 231-9575
  • Mfr. Part No. 2CCG001217R0001
Each
SGD182.75(exc. GST)
In Stock
Better World
ABB System Pro M Compact S200 MCB, 3P, 32A Curve B, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 746-7605
  • Mfr. Part No. 2CDS253001R0325 S203-B32
Each
SGD96.00(exc. GST)
Temporarily out of stock
Better World
Schneider Electric - Easy Series, EasyPact CVS Circuit breaker 3P 25A, Breaking Capacity 36kA, Fixed Mount
  • RS Stock No. 260-9729
  • Mfr. Part No. LV510331
Each
SGD270.22(exc. GST)
In Stock
Eaton 250A British Standard Fuse, B3, 415V ac, 111mm
  • RS Stock No. 139-984
  • Mfr. Part No. ED250
Each
SGD97.98(exc. GST)
Temporarily out of stock
ABB 32A Tag Fuse, 79 x 21 x 53mm, 500V
  • RS Stock No. 251-3430
  • Mfr. Part No. 1SCA022627R0910
1 Box of 9
SGD71.32(exc. GST)
In Stock
Better World
ABB System Pro M Compact S200M MCB, 2P, 2A Curve C, 440V AC, 125V DC, 10 kA Breaking Capacity
  • RS Stock No. 132-009
  • Mfr. Part No. 2CDS272001R0024 S202M-C2
Each
SGD107.47(exc. GST)
In Stock
Littelfuse 30A Inline Fuse Holder for ATO Fuse, 32V dc
  • RS Stock No. 894-9613
  • Mfr. Part No. FHAC0002ZXJ
Each
SGD13.41(exc. GST)
In Stock
ABB RCBO, 63A Current Rating, 4P Poles, Type C
  • RS Stock No. 237-5106
  • Mfr. Part No. 2CSR254001R1634
Each
SGD539.73(exc. GST)
In Stock
Schneider Electric Earth Bar L. 450mm x W. 13mm x H. 12mm
  • RS Stock No. 276-8807
  • Mfr. Part No. LVS04200
Each
SGD124.47(exc. GST)
In Stock
RS PRO MCB, 1P, 16A Curve B, 240 → 415V AC, 10 kA Breaking Capacity
  • RS Stock No. 265-0167
Each
SGD14.43(exc. GST)
Temporarily out of stock
ABB S800U MCB, 2P, 25A, Type Z, 240V AC, 50 kA Breaking Capacity
  • RS Stock No. 140-904
  • Mfr. Part No. 2CCS862017R0255
Each
SGD380.59(exc. GST)
Temporarily out of stock
ABB S800U MCB, 2P, 30A, Type Z, 240V AC, 50 kA Breaking Capacity
  • RS Stock No. 140-898
  • Mfr. Part No. 2CCS862017R0305
Each
SGD380.59(exc. GST)
Temporarily out of stock
ABB System Pro M Compact S200 M UC MCB, 2P, 30A, Type Z, 400V AC, 440V DC, 10 kA Breaking Capacity
  • RS Stock No. 201-024
  • Mfr. Part No. 2CDS272061R0528
Each
SGD406.39(exc. GST)
In Stock
RS PRO 16A British Standard Fuse, A1, 550V ac, 44.5mm
  • RS Stock No. 521-2517
Each (In a Pack of 5)
SGD5.606(exc. GST)
In Stock
Schneider Electric, Wiser Energy PowerTag, 63A, Energy Sensor, 2VA, Wireless
  • RS Stock No. 276-9362
  • Mfr. Part No. R9M70
Each
SGD236.48(exc. GST)
Limited stock
Siemens SENTRON Nut Keeper Kit for use with 3VA5
  • RS Stock No. 269-7149
  • Mfr. Part No. 3VA9233-0QA00
Each (In a Pack of 3)
SGD85.553(exc. GST)
In Stock
Mersen 8A Ceramic Cartridge Fuse, 8 x 32mm
  • RS Stock No. 230-2976
  • Mfr. Part No. B213096
Each (In a Pack of 10)
SGD2.021(exc. GST)
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