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

45 of 999+
In Stock
Schurter 4A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 269-3858
  • Mfr. Part No. 7010.3470
Each
SGD1.38(exc. GST)
In Stock
Better World
Schneider Electric Acti 9 C60H-DC MCB, 2P, 5A Curve C, 500V DC, 20 kA Breaking Capacity
  • RS Stock No. 776-3206
  • Mfr. Part No. A9N61525
Each
SGD104.81(exc. GST)
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 3P, 6A Curve D, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3556
  • Mfr. Part No. A9F55306
Each
SGD226.58(exc. GST)
In Stock
Better World
Schneider Electric Acti 9 iC60N MCB, 1P, 10A Curve C, 240V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 776-3446
  • Mfr. Part No. A9F77110
Each
SGD76.91(exc. GST)
In Stock
Mersen 80A NH Fuse, NH000, 690V ac
  • RS Stock No. 270-3118
  • Mfr. Part No. T228453
Each
SGD26.04(exc. GST)
In Stock
Better World
Schneider Electric Multi 9 MCB Mini Circuit Breaker, 2P, 40A Curve C, 440V AC
  • RS Stock No. 256-6781
  • Mfr. Part No. M9F42240
Each
SGD370.38(exc. GST)
In Stock
Littelfuse 3.15A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-2975
  • Mfr. Part No. 02133.15MXP
Each (In a Pack of 10)
SGD1.173(exc. GST)
In Stock
Better World
Schneider Electric 1+N Phase Surge Protector, 2kA, 1.5kV, DIN Rail Mount
  • RS Stock No. 776-3880
  • Mfr. Part No. A9L16298
Each
SGD499.27(exc. GST)
In Stock
WJ Furse Copper Earth Bar L. 400mm x W. 90mm x H. 90mm 6 Ways
  • RS Stock No. 124-2496
  • Mfr. Part No. 7TCA083670R0739 LK245-6
Each
SGD312.78(exc. GST)
In Stock
Better World
Schneider Electric Multi 9 C60SP MCB, 1P, 1A Curve C, 415V AC, 60V DC, 20 kA Breaking Capacity
  • RS Stock No. 211-2354
  • Mfr. Part No. M9F22101
Each
SGD26.96(exc. GST)
In Stock
Eaton 32A Bolted Tag Fuse, A4, 500V ac, 94mm
  • RS Stock No. 181-8505
  • Mfr. Part No. CEO32
Each (In a Box of 10)
SGD18.278(exc. GST)
Temporarily out of stock
Better World
ABB System Pro M Compact S200 MCB, 3P, 32A Curve C, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 746-7772
  • Mfr. Part No. 2CDS253001R0324 S203-C32
Each
SGD74.65(exc. GST)
In Stock
Littelfuse 210A Base Mount Fuse Holder for ATO Fuse
  • RS Stock No. 894-9622
  • Mfr. Part No. PDM61001ZXM
Each
SGD43.54(exc. GST)
In Stock
Eaton 10A Slow-Blow Cartridge Fuse, 10 x 38mm
  • RS Stock No. 228-663
  • Mfr. Part No. C10M10 CYLINDRICAL FUSE 10 x 38 10A AM 500V AC
1 Pack of 10
SGD17.97(exc. GST)
In Stock
Better World
Schneider Electric 32A Cartridge Fuse, 10 x 38mm
  • RS Stock No. 219-9058
  • Mfr. Part No. DF2CN32
Each (In a Pack of 10)
SGD13.708(exc. GST)
Temporarily out of stock
Schneider Electric ComPacT Shunt Opening Release for use with MasterPact NT/NW, NS3200 Fixed
  • RS Stock No. 207-319
  • Mfr. Part No. 33664
Each
SGD516.32(exc. GST)
Temporarily out of stock
Hager RCCB, 40A, 4 Pole, 30mA
  • RS Stock No. 144-4889
  • Mfr. Part No. CDC840F
Each
SGD440.83(exc. GST)
Temporarily out of stock
ABB SMISSLINE TP MCB, 2P, 10A, Type Z, 440V AC
  • RS Stock No. 246-2614
  • Mfr. Part No. 2CCS572001R1108
Each
SGD307.12(exc. GST)
In Stock
Sensata Airpax Airpax Thermal Circuit Breaker - 209 3 Pole 240V ac Voltage Rating Panel Mount, 30A Current Rating
  • RS Stock No. 275-0058
  • Mfr. Part No. 209-3-1-61-4-9-30-V
1 Box of 5
SGD1,901.84(exc. GST)
Temporarily out of stock
ABB RCBO, 20A Current Rating, 2P Poles, 30mA Trip Sensitivity, System Pro M Compact Range
  • RS Stock No. 201-6960
  • Mfr. Part No. 2CSR255080R1404 DS201 C40 AC30
Each
SGD256.53(exc. GST)
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