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

296 of 999+
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 250A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 260-477
  • Mfr. Part No. 3VA6225-7JQ31-2AA0
Each
$15,600.42(exc. GST)
Temporarily out of stock
Eaton Moeller xPole 3 Phase Busbar, 500V
  • RS Stock No. 253-280
  • Mfr. Part No. 215659 EVG-3PHAS/N/5MODUL/LS
Each
$24.01(exc. GST)
Temporarily out of stock
Siemens ALPHA Busbar
  • RS Stock No. 629-035
  • Mfr. Part No. 8GK9733-0KK40
Each
$131.31(exc. GST)
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 250A 3VA, 3 channels
  • RS Stock No. 155-809
  • Mfr. Part No. 3VA2325-8JP32-0AA0
Each
$7,766.74(exc. GST)
Temporarily out of stock
Better World
Siemens, Sentron MCCB Molded Case Circuit Breaker 4P 100A, Breaking Capacity 3 kA
  • RS Stock No. 245-359
  • Mfr. Part No. 3VA6210-8HL41-2AA0
Each
$7,848.58(exc. GST)
Temporarily out of stock
Miniature circuit breaker, 25 A, 3p+N
  • RS Stock No. 611-274
  • Mfr. Part No. PLSM-D25/3N-MW
Each
$230.01(exc. GST)
In Stock
Littelfuse SMD Non Resettable Fuse 2.5A, 125V
  • RS Stock No. 738-2860P
  • Mfr. Part No. 015402.5DRT
Each (Supplied on a Reel)
$5.235(exc. GST)
Temporarily out of stock
Siemens SENTRON 5SY Circuit Breaker, 4P, 40A Curve C, 440V AC, 60V DC, 25 kA Breaking Capacity
  • RS Stock No. 664-325
  • Mfr. Part No. 5SY8440-7
Each
$842.54(exc. GST)
In Stock
RS PRO 500mA T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 721-1597
Each (In a Pack of 10)
$3.374(exc. GST)
Temporarily out of stock
Legrand 50A Ceramic Cartridge Fuse, 22.2 x 58mm
  • RS Stock No. 266-3176
  • Mfr. Part No. 0 155 50
1 Box of 10
$527.18(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB 4P 1.25kA, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 270-4878
  • Mfr. Part No. 3VA2612-5HN42-0AA0
Each
$19,420.80(exc. GST)
In Stock
Bourns SMD Non Resettable Fuse 1A, 63V dc
  • RS Stock No. 692-5056
  • Mfr. Part No. SF-1206S100-2
Each (In a Pack of 10)
$0.938(exc. GST)
In Stock
Schneider Electric, ComPacT NSX Circuit breaker 1P 100A, Breaking Capacity 25 kA, Busbar System
  • RS Stock No. 654-232
  • Mfr. Part No. IL1001P251
Each
$442.90(exc. GST)
Currently unavailable
Nidec Components 1.35A Resettable Fuse, 30V
  • RS Stock No. 637-6426
  • Mfr. Part No. PRCP-R135-0-99
Each (In a Pack of 5)
$1.482(exc. GST)
Temporarily out of stock
Schneider Electric Busbar Trunking Jointing Device, KTA Series
  • RS Stock No. 339-798
  • Mfr. Part No. KTA2000ED4403
Each
$7,968.98(exc. GST)
In Stock
Siemens 16A Diazed Fuse, gG, 500/440V ac/dc
  • RS Stock No. 167-680
  • Mfr. Part No. 5SB2611
1 Pack of 25
$72.58(exc. GST)
Temporarily out of stock
Siemens 6A DIII Bottle Fuse, gG, 750V
  • RS Stock No. 665-083
  • Mfr. Part No. 5SD603
1 Pack of 5
$118.09(exc. GST)
Temporarily out of stock
Eaton 160A Tag Fuse, 76 x 192mm, 3.6kV
  • RS Stock No. 259-900
  • Mfr. Part No. 3.6WFOSJ160
1 Pack of 3
$3,691.29(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 160A, Breaking Capacity 110 kA, Fixed Mount
  • RS Stock No. 270-4097
  • Mfr. Part No. 3VA2116-7HN36-0AA0
Each
$3,271.13(exc. GST)
In Stock
ETA Thermal Circuit Breaker - 3120-N 2 Pole 50 V DC, 240 V AC Voltage Rating, 8A Current Rating
  • RS Stock No. 210-2058
  • Mfr. Part No. 3120-N32F-H7T1-SGRD-8A
Each
$76.36(exc. GST)
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