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

55 of 999+
In Stock
RS PRO 40A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 188-4632
Each
SGD29.92(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)
In Stock
Littelfuse 10A T Cartridge Fuse, 10 x 38mm
  • RS Stock No. 878-1583
  • Mfr. Part No. 0FLM010.T
Each
SGD19.82(exc. GST)
In Stock
Wickmann 200A Inline Fuse Holder, 32V dc
  • RS Stock No. 174-0633
  • Mfr. Part No. 04980921GXM5
1 Pack of 1
SGD11.22(exc. GST)
Temporarily out of stock
Better World
Schneider Electric, Compact MCCB 3P 100A, Breaking Capacity 200 kA, Fixed Mount
  • RS Stock No. 212-0266
  • Mfr. Part No. LV433245
Each
SGD1,295.67(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 1.6kA, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 345-342
  • Mfr. Part No. C16BN4FM
Each
SGD25,422.65(exc. GST)
Temporarily out of stock
Better World
ABB, Tmax XT MCCB 4P 125A, Fixed Mount
  • RS Stock No. 236-6668
  • Mfr. Part No. 1SDA068275R1 XT3S 250 TMG 125A FF
Each
SGD1,831.54(exc. GST)
In Stock
Schurter 20A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 703-2663
  • Mfr. Part No. 8020.0605.G
Each (In a Pack of 10)
SGD1.797(exc. GST)
In Stock
ABB System Pro M Compact S200M MCB, 3P, 63A Curve B, 440V AC, 10 kA Breaking Capacity
  • RS Stock No. 535-6162
  • Mfr. Part No. 2CDS273001R0635 S203M-B63
Each
SGD91.13(exc. GST)
In Stock
Mersen 6A Ceramic Cartridge Fuse, 8 x 32mm
  • RS Stock No. 230-2960
  • Mfr. Part No. A211025
Each (In a Pack of 10)
SGD2.691(exc. GST)
Temporarily out of stock
Eaton, Eaton Moeller NZM MCCB Molded Case Circuit Breaker 3P 63A, Breaking Capacity 18.5 kA, Fixed Mount
  • RS Stock No. 254-843
  • Mfr. Part No. 265728 NZMB1-S63
Each
SGD524.64(exc. GST)
Temporarily out of stock
Schneider Electric Acti9 1 Phase Distribution Board, 20 Way
  • RS Stock No. 339-637
  • Mfr. Part No. SEA9DE40
Each
SGD460.36(exc. GST)
Temporarily out of stock
Siemens 500A German Standard Fuse, NH2, 1kV
  • RS Stock No. 210-6973
  • Mfr. Part No. 3NE3334-0B
Each (In a Pack of 3)
SGD388.147(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB 3P 200A, Breaking Capacity 10 kA, Fixed Mount
  • RS Stock No. 147-209
  • Mfr. Part No. 3VA5220-6ED31-2AA0
Each
SGD1,759.80(exc. GST)
In Stock
Better World
Schneider Electric Surge Arrester, 40kA, 800V ac, DIN Rail Mount
  • RS Stock No. 219-8275
  • Mfr. Part No. A9L40271
Each
SGD332.24(exc. GST)
In Stock
Better World
Schneider Electric Compact Ins, Compact Inv, Compact Nsx, Easypact Cvs, Powerpact Multistandard Phase Barrier for use
  • RS Stock No. 221-1194
  • Mfr. Part No. LV429329
Each
SGD45.90(exc. GST)
Temporarily out of stock
ABB S301 MCB, 1P, 4A Curve K, 415V AC, 125V DC, 100 kA Breaking Capacity
  • RS Stock No. 203-021
  • Mfr. Part No. 2CDS381001R0337
Each
SGD97.93(exc. GST)
In Stock
ABB PS3 3 Phase Busbar, 400V ac, 17.5mm Pitch
  • RS Stock No. 489-7218
  • Mfr. Part No. 2CDL230001R1060 - PS3/60
Each
SGD189.05(exc. GST)
In Stock
Eaton 6A British Standard Fuse, A2, 550V ac, 73mm
  • RS Stock No. 413-327
  • Mfr. Part No. AAO6
Each (In a Pack of 5)
SGD9.112(exc. GST)
In Stock
WJ Furse Copper Earth Bar L. 750mm x W. 90mm x H. 90mm 12 Ways
  • RS Stock No. 124-2499
  • Mfr. Part No. 7TCA083670R0690 LK245-12
Each
SGD547.33(exc. GST)
1
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