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

34912 Products showing for Fuses & Circuit Breakers

83 of 999+
Temporarily out of stock
Better World
Siemens Sentron 5SY7 MCB, 1P, 500mA Curve C, 230V AC, 15 kA Breaking Capacity
  • RS Stock No. 622-0187
  • Mfr. Part No. 5SY7105-7
Each
$72.46(exc. GST)
In Stock
Littelfuse 30A Green Blade Car Fuse, 32V dc
  • RS Stock No. 787-4160
  • Mfr. Part No. 0297030.WXNV
Each (In a Pack of 10)
$0.513(exc. GST)
New product - Preorder today
Schneider Electric, ComPacT MCCB 1P 100A, Breaking Capacity 40 kA, Fixed Mount
  • RS Stock No. 655-283
  • Mfr. Part No. C10M1TM100
Each
$931.30(exc. GST)
Temporarily out of stock
Schneider Electric Acti9 1 Phase Distribution Board, 27 Way, 125 A
  • RS Stock No. 339-683
  • Mfr. Part No. SEA9APN27
Each
$1,015.98(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 1kA, Breaking Capacity 31 kA, Fixed Mount
  • RS Stock No. 428-722
  • Mfr. Part No. C100H360FM
Each
$30,476.29(exc. GST)
In Stock
Littelfuse 2A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 541-4628
  • Mfr. Part No. 0216002.MXP
Each (In a Pack of 10)
$2.187(exc. GST)
In Stock
Legrand MCB, 1P, 16A
  • RS Stock No. 293-1417
  • Mfr. Part No. 0 058 11
Each
$22.45(exc. GST)
Unavailable
Schneider Electric, ComPact MCCB Molded Case Circuit Breaker 3P 150A, Fixed Mount
  • RS Stock No. 221-1045
  • Mfr. Part No. LV433502
Each
$4,982.16(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 1kA, Breaking Capacity 31 kA, Fixed Mount
  • RS Stock No. 346-736
  • Mfr. Part No. C100H42EFM
Each
$29,655.44(exc. GST)
In Stock
Better World
RS PRO 30A F Ceramic Solar PV Cartridge Fuse, 10 x 38mm
  • RS Stock No. 239-4984
Each (In a Pack of 10)
$19.122(exc. GST)
Temporarily out of stock
Eaton 4A T Melamine Cartridge Fuse, 1.5 x 0.41in
  • RS Stock No. 261-724
  • Mfr. Part No. FNQ-R-4
1 Pack of 10
$1,206.88(exc. GST)
In Stock
RS PRO 16A Fast Acting Ceramic Cartridge Fuse, 5.2 x 20mm
  • RS Stock No. 180-073
1 Pack of 10
$51.76(exc. GST)
Temporarily out of stock
Eaton 400A Tag Fuse, 3L, 1kV, 205mm
  • RS Stock No. 282-6532
  • Mfr. Part No. PV-400A-3L
Each
$1,706.21(exc. GST)
Temporarily out of stock
Schneider Electric ComPacT Control Unit for use with Compact NS630b to NS3200
  • RS Stock No. 341-234
  • Mfr. Part No. C7AFM
Each
$8,737.37(exc. GST)
In Stock
RS PRO PC Board Non Resettable Fuse, Radial 400mA, 250V ac
  • RS Stock No. 767-5024
Each (In a Pack of 10)
$1.441(exc. GST)
Temporarily out of stock
Eaton 100A Tag Fuse, 21 x 87mm, 500V, 74mm
  • RS Stock No. 263-279
  • Mfr. Part No. BAO100
1 Pack of 20
$1,796.12(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB 4P 225A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 257-208
  • Mfr. Part No. 3VA5322-5EF41-2AA0
Each
$7,113.76(exc. GST)
Temporarily out of stock
Siemens SENTRON Adapter for use with 3VA13/14, 3VA23/24
  • RS Stock No. 161-881
  • Mfr. Part No. 3VA9367-0LF10
Each
$325.44(exc. GST)
In Stock
RS PRO 15A T Glass Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 668-6095
Each (In a Pack of 10)
$2.013(exc. GST)
Temporarily out of stock
Schneider Electric Compact Coupling Link for use with PanelSeT PLA
  • RS Stock No. 354-381
  • Mfr. Part No. NSYAZ4PLA
Each
$227.92(exc. GST)
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