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

307 of 999+
Temporarily out of stock
Better World
Siemens, Sentron MCCB Molded Case Circuit Breaker 4P 40A, Breaking Capacity 2.5 kA
  • RS Stock No. 245-321
  • Mfr. Part No. 3VA6140-7HN41-2AA0
Each
$6,642.08(exc. GST)
In Stock
Bourns SMD Non Resettable Fuse 500mA, 24V dc
  • RS Stock No. 692-4959
  • Mfr. Part No. SF-0402F050-2
Each (In a Pack of 10)
$0.711(exc. GST)
Temporarily out of stock
Eaton 100A Tag Fuse, 205 x 60 x 80mm, 1.5kV, 189mm
  • RS Stock No. 282-6216
  • Mfr. Part No. PV-100A-01XL-15
Each
$898.87(exc. GST)
Temporarily out of stock
Wickmann Resettable Fuse, 14V dc
  • RS Stock No. 174-0916
  • Mfr. Part No. RF1600-000
1 Pack of 1000
$321.54(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 630A, Breaking Capacity 30 kA, Fixed Mount
  • RS Stock No. 432-840
  • Mfr. Part No. C063H360FM
Each
$23,758.90(exc. GST)
Limited stock
Better World
Schneider Electric 32A Rail Mount Fuse Holder for 10 x 38mm Fuse, 1+N, 690V ac/dc
  • RS Stock No. 482-865
  • Mfr. Part No. DF101N
Each
$97.00(exc. GST)
In Stock
Siemens 1A Cartridge Fuse
  • RS Stock No. 210-7015
  • Mfr. Part No. 3NW8011-1
Each (In a Pack of 10)
$12.767(exc. GST)
In Stock
Better World
RS PRO 15A F Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 239-4979
Each (In a Pack of 10)
$79.772(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB 3P 600A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 249-764
  • Mfr. Part No. 3VA6560-5JQ32-0AA0
Each
$12,198.90(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 1.25kA, Breaking Capacity 42 kA, Fixed Mount
  • RS Stock No. 428-752
  • Mfr. Part No. C125H450FM
Each
$34,652.18(exc. GST)
In Stock
Littelfuse 1A Resettable Fuse, 32V dc
  • RS Stock No. 712-7519
  • Mfr. Part No. AHEF100
Each (In a Pack of 10)
$1.177(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 100A, Fixed Mount
  • RS Stock No. 260-8004
  • Mfr. Part No. C25V36E100
Each
$10,993.40(exc. GST)
In Stock
Siemens 160A Centred Tag Fuse, NH1, 500V ac
  • RS Stock No. 203-2033
  • Mfr. Part No. 3NA6136
Each (In a Pack of 3)
$54.39(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 160A, Fixed Mount
  • RS Stock No. 260-7682
  • Mfr. Part No. C12E3TM160B
Each
$1,586.12(exc. GST)
Temporarily out of stock
Siemens SENTRON 5SY5 MCB, 4P, 20A Curve B, 400V AC, 880V DC, 15 kA Breaking Capacity
  • RS Stock No. 610-374
  • Mfr. Part No. 5SY5420-6
Each
$620.64(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 800A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 249-553
  • Mfr. Part No. 3VA6580-5KT46-2AA0
Each
$20,652.95(exc. GST)
Temporarily out of stock
Siemens SENTRON Long Rear Connection for use with 3VA4/5 125
  • RS Stock No. 269-7092
  • Mfr. Part No. 3VA9133-0QE00
Each (In a Pack of 3)
$61.10(exc. GST)
Temporarily out of stock
SENTRON Wire Connector for use with 3VA57/58, 3VA67/68 Series
  • RS Stock No. 263-842
  • Mfr. Part No. 3VA9773-0JJ64
1 Kit
$4,516.16(exc. GST)
In Stock
ETA Thermal Circuit Breaker - 3120-N 2 Pole 50 V DC, 240 V AC Voltage Rating, 2.5A Current Rating
  • RS Stock No. 210-2070
  • Mfr. Part No. 3120-N521-H7T1-W01D-2.5A
Each
$65.98(exc. GST)
Temporarily out of stock
Better World
Siemens, Sentron MCCB Molded Case Circuit Breaker 4P 40A, Breaking Capacity 2.5 kA
  • RS Stock No. 245-343
  • Mfr. Part No. 3VA6140-8KL41-2AA0
Each
$6,054.61(exc. GST)
1
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