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

237 of 999+
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 250A 3VA, 4 channels
  • RS Stock No. 156-727
  • Mfr. Part No. 3VA2325-5JP42-0AA0
Each
$7,676.68(exc. GST)
Temporarily out of stock
Siemens 400A Tag Fuse, 141mm, 750V, 107.2mm
  • RS Stock No. 608-831
  • Mfr. Part No. 3NE4332-3
1 Pack of 3
$1,238.99(exc. GST)
Temporarily out of stock
Siemens SENTRON Plug for use with Circuit Breaker 3WL10 / 3VA27
  • RS Stock No. 266-614
  • Mfr. Part No. 3VW9011-0AA58
Each
$320.67(exc. GST)
In Stock
Wickmann 0.5A Resettable Fuse, 72 V ac, 72V dc
  • RS Stock No. 174-0871
  • Mfr. Part No. RF2567-000
Each (In a Pack of 20)
$0.669(exc. GST)
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 400A 3VA2, 3 channels
  • RS Stock No. 155-910
  • Mfr. Part No. 3VA2440-5JQ32-0AA0
Each
$8,397.08(exc. GST)
Temporarily out of stock
Eaton NZM Electronic Circuit Breaker 220A NZML, 4 channels , Fixed
  • RS Stock No. 120-793
  • Mfr. Part No. 155431 NZML3-ME220-AVE
Each
$8,461.02(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 70A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 269-611
  • Mfr. Part No. 3VA5270-6EC41-2AA0
Each
$3,229.14(exc. GST)
Temporarily out of stock
Siemens 1.4kA Tag Fuse, NH3, 500V
  • RS Stock No. 608-793
  • Mfr. Part No. 3NC3244-1U
1 Pack of 3
$1,481.24(exc. GST)
In Stock
Sensata Airpax Airpax Thermal Circuit Breaker - IULNK1 Single Pole Panel Mount, 50A Current Rating
  • RS Stock No. 275-0336
  • Mfr. Part No. IULNK1-1REC5-62-50.0-K-U
1 Box of 5
$1,219.55(exc. GST)
Temporarily out of stock
Eaton 50A Fuse Holder for 14 x 51mm Fuse, 1P, 1.5kV
  • RS Stock No. 228-874
  • Mfr. Part No. CHPV141U
1 Pack of 6
$219.27(exc. GST)
Temporarily out of stock
Eaton 100A Slow-Blow Cartridge Fuse, 22.2 x 58mm
  • RS Stock No. 228-849
  • Mfr. Part No. C22M100 CYLINDRICAL FUSE 22 x 58 100A AM 500V AC
1 Pack of 10
$94.80(exc. GST)
In Stock
Wickmann SMD Non Resettable Fuse 20A, 32V
  • RS Stock No. 174-0907
  • Mfr. Part No. 0501020.WR
Each (In a Pack of 10)
$1.173(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB 4P 300A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 257-369
  • Mfr. Part No. 3VA5330-6GF41-2AA0
Each
$11,266.76(exc. GST)
Temporarily out of stock
Schneider Electric, PowerPact MCCB 3P 400A, Breaking Capacity 18 kA, DIN Rail Mount
  • RS Stock No. 428-711
  • Mfr. Part No. NLLL36400U31X
Each
$23,198.57(exc. GST)
In Stock
Schneider Electric ComPacT New Generation Trip Unit for use with ComPacT NSX250 Circuit Breakers
  • RS Stock No. 260-7842
  • Mfr. Part No. C2542D250
Each
$1,809.94(exc. GST)
Last RS stock
Bourns SMD Non Resettable Fuse 7A, 24V dc
  • RS Stock No. 692-5043
  • Mfr. Part No. SF-1206F700-2
Each (In a Pack of 10)
$0.697(exc. GST)
In Stock
Better World
Schneider Electric 100A 444x220mm Fuse Block, 230 - 690V
  • RS Stock No. 219-8933
  • Mfr. Part No. KSB100SE4
Each
$1,406.05(exc. GST)
In Stock
Eaton 63A Centred Tag Fuse, NH02, 500V ac
  • RS Stock No. 703-8721P
  • Mfr. Part No. 63NHG02B
Each (Supplied in a Box)
$25.29(exc. GST)
Temporarily out of stock
SENTRON Wire Connector for use with 3VA55, 3VA65/66 Series
  • RS Stock No. 263-792
  • Mfr. Part No. 3VA9674-0JJ34
1 Kit
$2,187.12(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 40A, Breaking Capacity 10 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-384
  • Mfr. Part No. 3VA5140-6EC31-0AA0
Each
$1,659.41(exc. GST)
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