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

59 of 999+
Temporarily out of stock
Schneider Electric 3, 3+N Phase Surge Arrester, 65kA, 1.5kV, DIN Rail Mount
  • RS Stock No. 654-689
  • Mfr. Part No. A9L15586
Each
SGD1,696.70(exc. GST)
In Stock
Better World
Siemens 5SV3 RCCB, 40A, 4 Pole, 300mA
  • RS Stock No. 200-6018
  • Mfr. Part No. 5SV3644-4
Each
SGD1,091.75(exc. GST)
Temporarily out of stock
Better World
Schneider Electric Multi 9 MCB Mini Circuit Breaker, 4P, 40A Curve D, 277V AC
  • RS Stock No. 256-6778
  • Mfr. Part No. M9F23440
Each
SGD340.60(exc. GST)
Temporarily out of stock
Better World
Schneider Electric Acti 9 iC60N MCB, 4P, 20A Curve C, 12 → 440V AC, 220 → 250V DC, 6 kA Breaking Capacity
  • RS Stock No. 806-7357
  • Mfr. Part No. A9F44420
Each
SGD221.09(exc. GST)
In Stock
Schurter Circuit Breaker Switch - TA45 2 Pole 120V ac Voltage Rating Panel Mount
  • RS Stock No. 868-9272
  • Mfr. Part No. 4430.2867
Each
SGD56.73(exc. GST)
In Stock
Better World
Schneider Electric RCBO, 6A Current Rating, 1P Poles, 30mA Trip Sensitivity, Type C, Multi 9 Range
  • RS Stock No. 214-2050
  • Mfr. Part No. M9D11606
Each
SGD348.88(exc. GST)
In Stock
Phoenix Contact Trabtech Thermal Circuit Breaker - CB TM1 Single Pole 50V dc Voltage Rating, 3A Current Rating
  • RS Stock No. 201-6242
  • Mfr. Part No. 2800838
Each
SGD67.03(exc. GST)
New product - Preorder today
Schneider Electric 1+N Phase Surge Arrester, 20kA, 1.3kV, DIN Rail Mount
  • RS Stock No. 654-811
  • Mfr. Part No. EZ9L33620KIT
Each
SGD168.41(exc. GST)
Temporarily out of stock
Schneider Electric Flexible Elbow Busbar Trunking, 250mm, 250A, Canalis Series
  • RS Stock No. 119-394
  • Mfr. Part No. KSA250DLF401
Each
SGD1,271.61(exc. GST)
Limited stock
Limitor Thermal Fuse +130°C 5 A, 250V ac
  • RS Stock No. 124-5061
  • Mfr. Part No. A4-5AF
Each (In a Pack of 5)
SGD1.564(exc. GST)
In Stock
Eaton 20A Rail Mount Fuse Holder for A1 Fuse, 1P, 690V ac
  • RS Stock No. 182-1821
  • Mfr. Part No. RS20HGY
Each
SGD54.15(exc. GST)
In Stock
Eaton 20A F Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 848-4267
  • Mfr. Part No. KTK-R-20
Each
SGD56.01(exc. GST)
In Stock
Better World
Siemens SENTRON 5SY5 MCB, 2P, 10A Curve C, 10 kA Breaking Capacity
  • RS Stock No. 203-2341
  • Mfr. Part No. 5SY5210-7
Each
SGD198.64(exc. GST)
In Stock
Better World
Schneider Electric 6A F Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 211-2284
  • Mfr. Part No. DF2CN06
Each (In a Pack of 10)
SGD10.813(exc. GST)
In Stock
RS PRO 6A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 911-3427
Each (In a Pack of 10)
SGD0.468(exc. GST)
Temporarily out of stock
Socomec 100A Rail Mount Fuse Holder for 22 x 58mm Fuse, 3P+N, 690V
  • RS Stock No. 224-2558
  • Mfr. Part No. 57035004
Each
SGD181.18(exc. GST)
Temporarily out of stock
Eaton xEffect FAZ MCB, 3+N, 6A Curve C, 440V AC, 60V DC, 7.5 kA Breaking Capacity
  • RS Stock No. 253-966
  • Mfr. Part No. 241140 FAZT-C6/3N
Each
SGD540.21(exc. GST)
In Stock
Wurth Elektronik Plastic Base Mount Fuse Holder Cover for 5 x 20mm Fuse
  • RS Stock No. 893-0592
  • Mfr. Part No. 696120004001
Each (In a Pack of 10)
SGD0.462(exc. GST)
In Stock
Schneider Electric Removable Lock for use with Compact NB400, Compact NB600, Compact NG160, Compact NR100, Compact
  • RS Stock No. 188-1209
  • Mfr. Part No. 29370
Each
SGD33.77(exc. GST)
Temporarily out of stock
Eaton 2A Grey Blade Car Fuse, 32V ac/dc
  • RS Stock No. 852-7317
  • Mfr. Part No. ATM-2
Each
SGD3.89(exc. GST)
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