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

99 of 999+
Temporarily out of stock
WJ Furse Copper Earth Clamp Max. Conductor Size 25 x 3mm Nominal Rod dia. 10mm 26mm
  • RS Stock No. 153-2956
Each (In a Pack of 10)
SGD13.883(exc. GST)
In Stock
Littelfuse PC Board Non Resettable Fuse, Axial 10A, 125V ac/dc
  • RS Stock No. 541-3322
  • Mfr. Part No. 0251010.HAT1L
Each (In a Pack of 10)
SGD1.438(exc. GST)
In Stock
Eaton 3 Phase Surge Protector, 15kA, 110 → 230 V dc, 110 → 415V ac, DIN Rail Mount
  • RS Stock No. 847-3677
  • Mfr. Part No. 102036 FAZ-XAA-NA110-415VAC
Each
SGD60.66(exc. GST)
In Stock
Better World
Schneider Electric Multi 9 C60N MCB, 2P, 20A Curve C, 10 kA Breaking Capacity
  • RS Stock No. 214-2067
  • Mfr. Part No. M9F11220
Each
SGD167.28(exc. GST)
In Stock
Schneider Electric, ComPacT MCCB 3P 400A, Fixed Mount
  • RS Stock No. 260-8090
  • Mfr. Part No. C40F32D400
Each
SGD6,208.36(exc. GST)
Temporarily out of stock
Schneider Electric ComPacT New Generation Trip Unit for use with ComPacT NSX630 Circuit Breakers
  • RS Stock No. 260-8187
  • Mfr. Part No. C6342D630
Each
SGD2,124.45(exc. GST)
In Stock
Schurter 315mA T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 167-7998
  • Mfr. Part No. 0034.3112
Each (In a Pack of 10)
SGD0.646(exc. GST)
Being discontinued
RS PRO 1A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-558
Each (In a Pack of 10)
SGD0.619(exc. GST)
Last RS stock
Hager Hager NEN Circuit Breaker, 1P, 16A Curve B, 230 → 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 599-898
  • Mfr. Part No. NEN116
Each
SGD78.53(exc. GST)
In Stock
ETI 16A Bottle Fuse Holder, 1P, 400V ac
  • RS Stock No. 289-8815
  • Mfr. Part No. 2231003
Each
SGD3.83(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)
Unavailable
RS PRO Non-Resettable Surface Mount Fuse 500mA, 63V ac/dc
  • RS Stock No. 764-9365P
Each (Supplied on a Reel)
SGD0.15(exc. GST)
In Stock
RS PRO PC Board Non Resettable Fuse, Radial 1.6A, 250V
  • RS Stock No. 767-5147
Each (In a Pack of 10)
SGD0.397(exc. GST)
In Stock
Better World
ABB System Pro M Compact S200 MCB, 3P, 25A Curve B, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 746-7602
  • Mfr. Part No. 2CDS253001R0255 S203-B25
Each
SGD88.59(exc. GST)
Temporarily out of stock
Legrand 230V (Volts) Auto Recloser Circuit Trip for use with RCBO, RCCB
  • RS Stock No. 266-1299
  • Mfr. Part No. 406288
Each
SGD618.38(exc. GST)
Temporarily out of stock
RS PRO 4A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 177-8046
Each (In a Box of 500)
SGD1.039(exc. GST)
Temporarily out of stock
Better World
Schneider Electric Shunt trip for use with Multi 9 C60 C60BP, Multi 9 C60 C60BPR, Multi 9 C60 C60SP, Multi 9 C60H-DC,
  • RS Stock No. 220-1342
  • Mfr. Part No. M9A26947
Each
SGD212.17(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
Littelfuse 10A Red Blade Car Fuse, 32V dc
  • RS Stock No. 787-4104
  • Mfr. Part No. 0297010.WXNV
Each (In a Pack of 10)
SGD0.459(exc. GST)
Temporarily out of stock
Eaton xEffect FAZ MCB, 2P, 25A Curve D, 415V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 235-138
  • Mfr. Part No. 102232 FAZ-D25/2-RT
Each
SGD273.75(exc. GST)
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