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

83 of 999+
In Stock
Schneider Electric Acti9 iID RCCB, 100A, 4 Pole, 100mA, Type AC, 380 → 415V ac
  • RS Stock No. 130-796
  • Mfr. Part No. A9R12491
Each
SGD778.78(exc. GST)
Temporarily out of stock
Schneider Electric Distribution Block for use with Compact, Kaedra, Pragma, Prisma-G, Prisma-P, Prisma-Pack, Prisma-PH,
  • RS Stock No. 822-7988
  • Mfr. Part No. LGY412560
Each
SGD116.54(exc. GST)
In Stock
Better World
Schneider Electric Acti 9 iC60N MCB, 2P, 16A Curve C, 100 → 130V AC, 12 → 144V DC, 6 kA Breaking Capacity
  • RS Stock No. 734-9065
  • Mfr. Part No. A9F77216
Each
SGD162.29(exc. GST)
Temporarily out of stock
Siemens 63A Bottle Fuse Holder, 3P, 400V ac
  • RS Stock No. 202-7125
  • Mfr. Part No. 5SG6207
Each (In a Pack of 4)
SGD32.08(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB 3P 250A, Breaking Capacity 18 kA, Fixed Mount
  • RS Stock No. 147-827
  • Mfr. Part No. 3VA5225-5ED31-1AA0
Each
SGD2,076.70(exc. GST)
Being discontinued
RS PRO 2A F Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-431
Each (In a Pack of 10)
SGD0.602(exc. GST)
In Stock
Siemens 1A F Cartridge Fuse, 10 x 38mm
  • RS Stock No. 203-2110
  • Mfr. Part No. 3NW6011-1
Each (In a Pack of 10)
SGD6.031(exc. GST)
In Stock
Better World
Siemens Sentron 5SY6 MCB, 2P, 6A Curve C, 400V AC, 72V DC, 6 kA Breaking Capacity
  • RS Stock No. 196-3628
  • Mfr. Part No. 5SY6206-7
Each
SGD82.90(exc. GST)
Temporarily out of stock
Eaton 400A Centred Tag Fuse, NH03, 500V ac
  • RS Stock No. 703-8756
  • Mfr. Part No. 400NHG03B
Each
SGD35.55(exc. GST)
In Stock
Siemens 400A Centred Tag Fuse, NH3, 500V ac
  • RS Stock No. 203-2017
  • Mfr. Part No. 3NA3360
Each (In a Pack of 3)
SGD68.703(exc. GST)
In Stock
Siemens 40A NH Fuse, NH000, 440 - 500V ac/dc
  • RS Stock No. 269-8339
  • Mfr. Part No. 3ND1817
Each (In a Pack of 3)
SGD27.017(exc. GST)
In Stock
Better World
Schneider Electric Acti 9 Rotary Handle for use with iC60 MCB, iDPN Vigi, ilD MCB, iSW-NA
  • RS Stock No. 791-3023
  • Mfr. Part No. A9A27005
Each
SGD108.40(exc. GST)
Temporarily out of stock
Schneider Electric Auxiliary Bus Duct, 1.755m, 32A, Linergy Series
  • RS Stock No. 119-213
  • Mfr. Part No. LVS04203
Each
SGD369.37(exc. GST)
In Stock
Better World
Schneider Electric Acti 9 Busbar, 415V ac, 18mm Pitch
  • RS Stock No. 806-7222
  • Mfr. Part No. A9XPH312
Each
SGD49.50(exc. GST)
In Stock
Eaton 500mA T Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 851-1693
  • Mfr. Part No. FNQ-R-1/2
Each
SGD88.89(exc. GST)
In Stock
Better World
Schneider Electric Acti 9 Acti9 iDT40N MCB, 4P, 63A Curve C, 10 kA Breaking Capacity
  • RS Stock No. 191-6102
  • Mfr. Part No. A9P24463
Each
SGD759.79(exc. GST)
In Stock
Eaton 125A Offset Tag Fuse, 440V ac
  • RS Stock No. 182-1695
  • Mfr. Part No. XS125
Each
SGD151.69(exc. GST)
In Stock
TE Connectivity Thermal Circuit Breaker - W23 Single Pole 50 V dc, 250V ac Voltage Rating, 10A Current Rating
  • RS Stock No. 782-7947
  • Mfr. Part No. W23-X1A1G-10
Each
SGD64.91(exc. GST)
In Stock
Better World
Schneider Electric iID RCCB, 40A, 4 Pole, 300mA, Type B-SI, 400V ac
  • RS Stock No. 248-3724
  • Mfr. Part No. A9Z64440
Each
SGD1,958.79(exc. GST)
In Stock
Schneider Electric TeSys GV6P MCB, 3P, 500A, 690V AC, 70 kA Breaking Capacity
  • RS Stock No. 188-4755
  • Mfr. Part No. GV6P500H
Each
SGD2,707.82(exc. GST)
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