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

47304 Products showing for Fuses & Circuit Breakers

8 of 999+
In Stock
Mersen 5A F GMG Cartridge Fuse, 10 x 38mm
  • RS Stock No. 914-4351
  • Mfr. Part No. ATM5
Each
TWD397.00(exc. GST)
In Stock
Eaton 1A F Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 412-251
  • Mfr. Part No. TDC10-1A
Each (In a Pack of 10)
TWD16.00(exc. GST)
In Stock
Eaton 3A F Glass Cartridge Fuse, 6.3 x 25mm
  • RS Stock No. 849-5617
  • Mfr. Part No. AGX-3
Each
TWD61.00(exc. GST)
In Stock
Littelfuse 2.5A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-2969
  • Mfr. Part No. 021302.5MXP
Each (In a Pack of 10)
TWD19.90(exc. GST)
In Stock
Schurter 1A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 789-7797
  • Mfr. Part No. 0001.2504
Each (In a Bag of 10)
TWD16.80(exc. GST)
In Stock
Better World
Siemens Sentron 5SY4 MCB, 2P, 63A Curve C, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 124-3173
  • Mfr. Part No. 5SY4263-7
Each
TWD5,652.00(exc. GST)
In Stock
Better World
Siemens Sentron 5SY4 MCB, 3P, 20A Curve D, 400V AC, 10 kA Breaking Capacity
  • RS Stock No. 772-1388
  • Mfr. Part No. 5SY4320-8
Each
TWD2,726.00(exc. GST)
In Stock
Better World
Schneider Electric Acti 9 iC60H MCB, 3P, 20A Curve B, 440V AC, 100 → 133V DC, 10 kA Breaking Capacity
  • RS Stock No. 791-3225
  • Mfr. Part No. A9F53320
Each
TWD3,708.00(exc. GST)
In Stock
Better World
Schneider Electric Multi 9 C60SP MCB, 3P, 32A Curve C, 440V AC, 15 kA Breaking Capacity
  • RS Stock No. 211-2376
  • Mfr. Part No. M9F22332
Each
TWD4,765.00(exc. GST)
In Stock
Mersen 32A Slow-Blow Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 247-2781
  • Mfr. Part No. H1014583
1 Box of 10
TWD3,846.00(exc. GST)
In Stock
Better World
Schneider Electric Acti 9 iC60N MCB, 3P, 32A Curve C, 100 → 130V AC, 12 → 144V DC, 6 kA Breaking Capacity
  • RS Stock No. 734-9166
  • Mfr. Part No. A9F77332
Each
TWD4,973.00(exc. GST)
In Stock
Legrand RCCB, 40A, 2 Pole, 30mA, Type F, 230V
  • RS Stock No. 266-1361
  • Mfr. Part No. 411644
Each
TWD6,666.00(exc. GST)
Being discontinued
Siemens 160A Fuse Holder for NH00 Fuse, 1P, 690V
  • RS Stock No. 269-8368
  • Mfr. Part No. 3NH3032
Each (In a Pack of 3)
TWD662.70(exc. GST)
Being discontinued
RS PRO 4A T Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 563-542
Each (In a Pack of 10)
TWD11.70(exc. GST)
In Stock
Siemens 40A Cartridge Fuse, 14 x 51mm
  • RS Stock No. 396-253
  • Mfr. Part No. 3NC1440
Each (In a Pack of 10)
TWD780.30(exc. GST)
In Stock
ABB F404 RCCB, 40A, 3+N Pole, 30mA, Type A
  • RS Stock No. 178-241
  • Mfr. Part No. 2CCF544110E0400 - F404A-40/0.03, 2CC
Each
TWD5,685.00(exc. GST)
In Stock
Littelfuse Phosphor Bronze PCB Mount Fuse Clip for 5 x 20mm Cartridge Fuse
  • RS Stock No. 787-4173
  • Mfr. Part No. 52100001009
Each (In a Pack of 10)
TWD6.10(exc. GST)
In Stock
Schneider Electric Earth Bar L. 200mm x W. 13mm x H. 12mm
  • RS Stock No. 276-8808
  • Mfr. Part No. LVS04202
Each
TWD3,783.00(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 5A, Breaking Capacity 10 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-722
  • Mfr. Part No. 3VA5105-1MH31-0AA0
Each
TWD20,627.00(exc. GST)
In Stock
RS PRO 500mA T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 721-1597
Each (In a Pack of 10)
TWD36.30(exc. GST)
1
8
2366
Results per page

Related links