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

116 of 999+
Temporarily out of stock
Schneider Electric R9PR RCCB, 40A, 3 Pole, 30mA, Type A, 400V ac
  • RS Stock No. 276-8973
  • Mfr. Part No. R9PRA440
Each
SGD393.11(exc. GST)
Temporarily out of stock
Eaton 400A Rail Mount Fuse Holder for NH2 Fuse, 1P, 690V ac
  • RS Stock No. 182-1787
  • Mfr. Part No. SD2-D-PV
Each
SGD109.99(exc. GST)
Temporarily out of stock
Schurter Thermal Circuit Breaker - TA45 2 Pole 60 V dc, 240V ac Voltage Rating Panel Mount, 16A Current Rating
  • RS Stock No. 868-9171
  • Mfr. Part No. 4430.2145
Each (In a Pack of 20)
SGD39.269(exc. GST)
In Stock
Better World
Schneider Electric, ComPacT NSX MCCB 3P 250A, Fixed Mount
  • RS Stock No. 254-6353
  • Mfr. Part No. C25F32D250
Each
SGD3,131.94(exc. GST)
In Stock
Better World
Schneider Electric Acti 9 2 Phase Busbar, 415V ac, 18mm Pitch
  • RS Stock No. 776-2724
  • Mfr. Part No. A9XPH224
Each
SGD58.69(exc. GST)
In Stock
Hager NFT MCB, 1+N, 10A, 240 → 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 144-4741
  • Mfr. Part No. NFT710
Each
SGD119.57(exc. GST)
Temporarily out of stock
50A NH Fuse, 58 x 30 x 135mm, 500V ac
  • RS Stock No. 262-232
  • Mfr. Part No. 50NHG01BI NH FUSE 50A 500V GL/GG SIZE 01
1 Pack of 3
SGD39.98(exc. GST)
Temporarily out of stock
Eaton Three Phase Surge Protector, 40kA, 2.2kV, DIN Rail Mount
  • RS Stock No. 121-156
  • Mfr. Part No. 167632 SPCT2-460-3+NPE/BB
Each
SGD443.21(exc. GST)
In Stock
Siemens ALPHA Busbar
  • RS Stock No. 226-0832
  • Mfr. Part No. 8GK9733-0KK20
Each
SGD81.64(exc. GST)
In Stock
Eaton 1A T Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 854-8878
  • Mfr. Part No. FNQ-R-1
Each
SGD102.08(exc. GST)
Being discontinued
RS PRO 3A T Ceramic Cartridge Fuse, 6.3 x 25mm
  • RS Stock No. 174-7957
Each (In a Box of 500)
SGD0.336(exc. GST)
In Stock
Legrand 16A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 180-6119
  • Mfr. Part No. 0 133 16
Each (In a Box of 10)
SGD6.275(exc. GST)
In Stock
Better World
Siemens Sentron 5SY6 MCB, 3P, 20A Curve B, 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 489-6653
  • Mfr. Part No. 5SY6320-6
Each
SGD131.99(exc. GST)
In Stock
Eaton xEffect MCB, 2P, 16A Curve B, 230 → 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 769-4400
  • Mfr. Part No. 239088 FAZ6-B16/2
Each
SGD99.07(exc. GST)
In Stock
Eaton 200A British Standard Fuse, FM, 690 V ac, 500V dc, 80 → 85mm
  • RS Stock No. 156-9061
  • Mfr. Part No. 200FM
Each
SGD89.17(exc. GST)
In Stock
Hinode Electric Co Ltd 80A Bolted Tag Fuse, 61mm
  • RS Stock No. 103-4249
  • Mfr. Part No. 660GH-080
Each (In a Pack of 5)
SGD33.62(exc. GST)
In Stock
Better World
Schneider Electric TeSys Thermal Circuit Breaker - TeSyS GV 3 Pole 690V ac Voltage Rating, 115A Current Rating
  • RS Stock No. 175-1496
  • Mfr. Part No. GV4P115B
Each
SGD1,268.51(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT NSX MCCB 3P 250A, Fixed Mount
  • RS Stock No. 254-6352
  • Mfr. Part No. C25F3
Each
SGD1,062.41(exc. GST)
Temporarily out of stock
ABB, SACE Tmax T MCCB Molded Case Circuit Breaker 3P 630A, Fixed Mount
  • RS Stock No. 232-0091
  • Mfr. Part No. 1SDA054405R1 T5S630 FF PR221-I 630A
Each
SGD3,962.72(exc. GST)
Temporarily out of stock
Better World
Schneider Electric Auto Recloser for use with 4P iID
  • RS Stock No. 221-1102
  • Mfr. Part No. A9C70344
Each
SGD1,125.91(exc. GST)
1
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