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

211 of 999+
ETA Thermal Magnetic Circuit Breaker - 201 Single Pole, 1A Current Rating
  • RS Stock No. 333-237
  • Mfr. Part No. 201-1A
Each
$80.91(exc. GST)
Eaton 100A Cartridge Fuse, 31 x 131mm
  • RS Stock No. 243-488
  • Mfr. Part No. 100MJ31-7
1 Pack of 10
$1,040.79(exc. GST)
Bourns 2.5A Resettable Fuse, 30V
  • RS Stock No. 647-8566
  • Mfr. Part No. MF-R250
Each (In a Pack of 10)
$0.735(exc. GST)
Siemens ALPHA Assembly Kit for use with 3VA2 Molded Case Circuit Breakers
  • RS Stock No. 629-372
  • Mfr. Part No. 8GK6725-6KK23
Each
$693.04(exc. GST)
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 400A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 260-582
  • Mfr. Part No. 3VA6340-5KM41-0AA0
Each
$11,141.03(exc. GST)
Legrand 4A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 180-6115
  • Mfr. Part No. 0 133 04
Each (In a Box of 10)
$5.57(exc. GST)
Siemens SENTRON 3 Phase Busbar, 27mm Pitch
  • RS Stock No. 300-090
  • Mfr. Part No. 5SH5322
Each
$109.79(exc. GST)
Schneider Electric, PowerPact MCCB 3P 125A, Breaking Capacity 18 kA, Clip-On
  • RS Stock No. 340-871
  • Mfr. Part No. BGF36125
Each
$1,767.77(exc. GST)
Eaton 630A Tag Fuse, 71 x 150mm, 400V
  • RS Stock No. 262-547
  • Mfr. Part No. 630NHG3B-400
1 Pack of 3
$150.15(exc. GST)
Schneider Electric, PowerPact MCCB 2P 25A, Breaking Capacity 65 kA, Clip-On
  • RS Stock No. 341-591
  • Mfr. Part No. BJF26025
Each
$1,889.31(exc. GST)
Eaton 2A Bottle Fuse, 400V
  • RS Stock No. 259-116
  • Mfr. Part No. 2NZ01R FUSE-D01 2A GR 400VAC E14
1 Pack of 10
$101.75(exc. GST)
ABB EV1119 Neutral Phase Busbar
  • RS Stock No. 202-034
  • Mfr. Part No. 1STQ001014A0000
Each
$1,706.55(exc. GST)
Siemens 125A Centred Tag Fuse, NH000, 400V ac
  • RS Stock No. 203-1990
  • Mfr. Part No. 3NA3832-8
Each (In a Pack of 3)
$105.057(exc. GST)
Better World
Siemens, Sentron MCCB Molded Case Circuit Breaker 4P 100A, Breaking Capacity 3 kA
  • RS Stock No. 245-293
  • Mfr. Part No. 3VA6210-7KT41-0AA0
Each
$16,488.10(exc. GST)
Siemens SENTRON Locking Kit
  • RS Stock No. 277-0864
  • Mfr. Part No. 3WA9111-0BA76
Each
$1,985.79(exc. GST)
Siemens 160A Tag Fuse, 123.9mm, 800V, 110mm
  • RS Stock No. 608-854
  • Mfr. Part No. 3NB1025-1KK10
1 Pack of 3
$610.49(exc. GST)
Schneider Electric, PowerPact MCCB 1P 45A, Breaking Capacity 18 kA, Clip-On
  • RS Stock No. 429-480
  • Mfr. Part No. BDF16045
Each
$985.38(exc. GST)
Eaton 32A Ceramic Cartridge Fuse, 14 x 51mm
  • RS Stock No. 703-8431P
  • Mfr. Part No. C14G32
Each (Supplied in a Bag)
$4.794(exc. GST)
Eaton xEnergy Basic Distribution Board Enclosure
  • RS Stock No. 251-834
  • Mfr. Part No. 193176 BP-O-850/8-EP-W
Each
$1,469.26(exc. GST)
Siemens 6.3A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 226-2958
  • Mfr. Part No. 8WA1822-7EF25
Each (In a Pack of 10)
$4.709(exc. GST)
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