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

67 of 999+
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 160A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 210-1690
  • Mfr. Part No. 3VA1216-4EF32-0AA0
Each
SGD1,026.70(exc. GST)
In Stock
Schneider Electric Motor Mechanism for use with ComPacT NSX New Generation
  • RS Stock No. 130-908
  • Mfr. Part No. LV432643
Each
SGD2,763.11(exc. GST)
In Stock
Electro PJP Earth Rod W. 12mm x 420mm H. 420mm
  • RS Stock No. 263-9091
  • Mfr. Part No. 2223Drill
Each
SGD71.26(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 400A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 260-8097
  • Mfr. Part No. C40F4
Each
SGD3,984.49(exc. GST)
Temporarily out of stock
Eaton A-PKZ0 Shunt Opening Release for use with Circuit Breaker
  • RS Stock No. 272-0701
  • Mfr. Part No. 172269 A-PKZ0(24V60HZ)
Each
SGD73.43(exc. GST)
In Stock
Littelfuse 11A F Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 738-3197
  • Mfr. Part No. 0FLU011.T
Each
SGD62.62(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT New Generation MCCB 4P 20A, Breaking Capacity 25 kA, Screw Mount
  • RS Stock No. 207-187
  • Mfr. Part No. BDL46020LU
Each
SGD1,050.39(exc. GST)
Last RS stock
Schurter 10A Panel Mount Fuse Holder for 6.3 x 32mm Fuse, 1P, 600V ac
  • RS Stock No. 123-2018
  • Mfr. Part No. 0031.1624
Each
SGD10.39(exc. GST)
In Stock
Phoenix Contact Mounting Base for use with CB Series
  • RS Stock No. 768-1139
  • Mfr. Part No. 2800929
Each
SGD33.19(exc. GST)
In Stock
Schneider Electric, ComPacT NSX MCCB 4P 100A, Breaking Capacity 36 kA, Fixed Mount
  • RS Stock No. 254-6287
  • Mfr. Part No. C10F4
Each
SGD543.38(exc. GST)
In Stock
Better World
ABB Compact Home SH200 MCB, 3P, 16A Curve C, 440V AC, 6 kA Breaking Capacity
  • RS Stock No. 539-8352
  • Mfr. Part No. 2CDS213001R0164 SH203-C16
Each
SGD46.95(exc. GST)
In Stock
Schurter 10A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 167-6153
  • Mfr. Part No. 0034.3127
Each (In a Pack of 10)
SGD0.661(exc. GST)
In Stock
RS PRO Industrial Surge Protector, 40kA, 2.8kV, DIN Rail Mount
  • RS Stock No. 101-772
Each
SGD66.25(exc. GST)
Temporarily out of stock
Siemens SENTRON Busbar
  • RS Stock No. 266-741
  • Mfr. Part No. 8US1998-7CB54
1 Pack of 10
SGD49.03(exc. GST)
Temporarily out of stock
ABB System Pro M Compact S200 MCB, 4P, 4A Curve B, 400V AC, 110V DC, 10 kA Breaking Capacity
  • RS Stock No. 203-730
  • Mfr. Part No. 2CDS254001R0045
Each
SGD324.40(exc. GST)
Temporarily out of stock
ABB System Pro M Compact S200 MCB, 4P, 2A, Type Z, 400V AC, 110V DC, 10 kA Breaking Capacity
  • RS Stock No. 200-936
  • Mfr. Part No. 2CDS254001R0278
Each
SGD368.29(exc. GST)
Temporarily out of stock
ABB System Pro M Compact S200 MCB, 3P, 4A, Type Z, 400V AC, 110V DC, 10 kA Breaking Capacity
  • RS Stock No. 204-264
  • Mfr. Part No. 2CDS253001R0338
Each
SGD254.92(exc. GST)
In Stock
Eaton 160A Rail Mount Fuse Holder for NH00 Fuse, 3P, 690V ac
  • RS Stock No. 181-8500
  • Mfr. Part No. TD00-IP20
Each
SGD30.13(exc. GST)
In Stock
Eaton 10A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 703-8500
  • Mfr. Part No. C10M10
Each (In a Pack of 10)
SGD2.181(exc. GST)
In Stock
Eaton xEffect MCB, 3P, 20A Curve C, 230 → 415V AC, 6 kA Breaking Capacity
  • RS Stock No. 769-4605
  • Mfr. Part No. 239149 FAZ6-C20/3
Each
SGD147.07(exc. GST)
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