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

35151 Products showing for Fuses & Circuit Breakers

261 of 999+
Temporarily out of stock
Schneider Electric RCBO, 25A Current Rating, 1P Poles, 30mA Trip Sensitivity, Acti 9 Range
  • RS Stock No. 230-6648
  • Mfr. Part No. A9D61825
Each
$108.68(exc. GST)
In Stock
Mersen 8A Ceramic Cartridge Fuse, 14 x 51mm
  • RS Stock No. 230-3597
  • Mfr. Part No. T215642
Each (In a Pack of 10)
$6.255(exc. GST)
In Stock
Siemens SENTRON 1 Phase Busbar, 36mm Pitch
  • RS Stock No. 187-5219
  • Mfr. Part No. 5ST3765-2
Each
$43.68(exc. GST)
Unavailable
Schneider Electric, NSX MCCB 3P 400A, Breaking Capacity 75 kA, Fixed Mount
  • RS Stock No. 219-8385
  • Mfr. Part No. LV433622
Each
$8,289.73(exc. GST)
In Stock
Phoenix Contact 16A Slow-Blow Cartridge Fuse, 10 x 38mm
  • RS Stock No. 197-5970
  • Mfr. Part No. 2903126
Each
$32.93(exc. GST)
Temporarily out of stock
Schneider Electric, Acti9 MCCB 4P 250A, Panel Mount
  • RS Stock No. 654-763
  • Mfr. Part No. SEA9PQCB2504
Each
$2,620.57(exc. GST)
In Stock
ETA Thermal Circuit Breaker - 104-PR Single Pole 240V Voltage Rating PCB Mount, 1.8A Current Rating
  • RS Stock No. 728-8608
  • Mfr. Part No. 104-PR-1.8A
Each
$36.65(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 20A, Breaking Capacity 10 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-249
  • Mfr. Part No. 3VA5120-6EF31-0AA0
Each
$1,735.40(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 250A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 260-251
  • Mfr. Part No. 3VA6325-5HM41-0AA0
Each
$8,750.72(exc. GST)
In Stock
Eaton 400A Centred Tag Fuse, NH1, 690V ac
  • RS Stock No. 182-1383
  • Mfr. Part No. 170M3819D
Each (In a Box of 6)
$648.685(exc. GST)
Temporarily out of stock
Eaton NZM Circuit Breaker for use with Circuit Breaker
  • RS Stock No. 255-655
  • Mfr. Part No. 269231 NZMH2-A40-NA
Each
$1,488.10(exc. GST)
Temporarily out of stock
Siemens 30A Fuse Holder, 3P, 600V
  • RS Stock No. 627-018
  • Mfr. Part No. 3NW7531-3HG
1 Pack of 2
$338.59(exc. GST)
In Stock
Siemens Fixing Bracket for use with Siemens RT Series Relays
  • RS Stock No. 758-6851
  • Mfr. Part No. LZS:RT17016
1 Bag of 10
$34.18(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 600A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 249-522
  • Mfr. Part No. 3VA6560-6HM42-0AA0
Each
$12,355.90(exc. GST)
Temporarily out of stock
Siemens SENTRON Testing Cables for use with 3VA20-26
  • RS Stock No. 155-957
  • Mfr. Part No. 3VA9987-0MA10
Each
$1,155.77(exc. GST)
In Stock
Siemens SENTRON 1 Phase Busbar, 27mm Pitch
  • RS Stock No. 187-5163
  • Mfr. Part No. 5ST3605
Each
$12.51(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT New Generation MCCB 1P 20A, Breaking Capacity 65 kA, Screw Mount
  • RS Stock No. 207-189
  • Mfr. Part No. BGL16020
Each
$935.13(exc. GST)
Temporarily out of stock
Eaton 315A Tag Fuse, 3L, 1.5kV
  • RS Stock No. 282-6212
  • Mfr. Part No. PV-315A-3L-15
Each
$1,119.78(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 211-3765
  • Mfr. Part No. 3VA2040-6HN32-0AA0
Each
$1,913.21(exc. GST)
Temporarily out of stock
Eaton IZMX/INX Electronic Circuit Breaker 2.5kA , 3 channels , Withdrawable
  • RS Stock No. 132-705
  • Mfr. Part No. 183739 IZMX40N3-V25W-1
Each
$39,046.22(exc. GST)
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