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

168 of 999+
In Stock
Inventronics Surge Protector, 5kA, 10kV, Surface Mount Mount
  • RS Stock No. 285-370
  • Mfr. Part No. PU-10KD05KBTA
Each
$19.94(exc. GST)
Temporarily out of stock
Eaton 2A Tag Fuse, 550V ac
  • RS Stock No. 229-146
  • Mfr. Part No. NSD2
1 Pack of 20
$361.06(exc. GST)
In Stock
Littelfuse 300A Grey Time Delay Car Fuse, 32V dc
  • RS Stock No. 878-1296
  • Mfr. Part No. 0298300.ZXH
Each
$24.17(exc. GST)
In Stock
Siemens 63A Bottle Fuse Holder, 1P, 400V ac
  • RS Stock No. 622-0711
  • Mfr. Part No. 5SG1701
Each
$37.73(exc. GST)
Temporarily out of stock
Schneider Electric IID RCCB, 63A, 4 Pole, 30mA, Type A, 380 → 415V ac
  • RS Stock No. 230-6689
  • Mfr. Part No. A9R51463
Each
$128.78(exc. GST)
Unavailable
ABB System Pro M Compact S200 MCB, 2P, 50A Curve B, 400V AC, 6 kA Breaking Capacity
  • RS Stock No. 746-7589
  • Mfr. Part No. 2CDS252001R0505 S202-B50
Each
$82.43(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT NSX MCCB 3P 63A, Breaking Capacity 36 kA, Panel Mount
  • RS Stock No. 654-702
  • Mfr. Part No. IL0633P36
Each
$1,250.32(exc. GST)
In Stock
Littelfuse SMD Non Resettable Fuse 2.5A, 125V
  • RS Stock No. 738-2983P
  • Mfr. Part No. 045202.5MRL
Each (Supplied on a Reel)
$1.938(exc. GST)
In Stock
Littelfuse 4A Surface Mount Fuse Block, 125V ac/dc
  • RS Stock No. 219-6125
  • Mfr. Part No. 0154004.DR
Each (In a Pack of 10)
$3.978(exc. GST)
Temporarily out of stock
Siemens ALPHA Assembly Kit for use with 3VA2 Molded Case Circuit Breakers
  • RS Stock No. 629-304
  • Mfr. Part No. 8GK6720-4KK13
Each
$649.21(exc. GST)
In Stock
ASSMANN WSW Surge Protector, 10kV, DIN Rail Mount
  • RS Stock No. 649-587
  • Mfr. Part No. DN-95421
Each
$90.83(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 800A, Breaking Capacity 50 kA, Fixed Mount
  • RS Stock No. 654-489
  • Mfr. Part No. C080N350FM
Each
$8,892.97(exc. GST)
Temporarily out of stock
Schneider Electric Altivar Process Modular Busbar, 380 → 480V
  • RS Stock No. 578-327
  • Mfr. Part No. VW3A98ABPDCE1
Each
$348.29(exc. GST)
In Stock
ETA Thermal Circuit Breaker - 1410-L Single Pole 250V Voltage Rating PCB Mount, 630mA Current Rating
  • RS Stock No. 409-750
  • Mfr. Part No. 1410-L210-L2F1-S02-0.63A
Each
$25.04(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 63A, Breaking Capacity 2.5 kA, Fixed Mount
  • RS Stock No. 270-4726
  • Mfr. Part No. 3VA2163-6JQ42-0AA0
Each
$4,170.43(exc. GST)
Currently unavailable
Legrand HX 2 Phase Busbar, 400V, 35.5mm Pitch
  • RS Stock No. 731-9437
  • Mfr. Part No. 4 049 38
Each
$59.03(exc. GST)
Temporarily out of stock
Clipsal Electrical MAX9 MX9MC MCB, 3P, 40A, 415V AC, 6000 A Breaking Capacity
  • RS Stock No. 282-2955
  • Mfr. Part No. MX9MC340
Each
$67.11(exc. GST)
In Stock
Phoenix Contact EC Electronic Circuit breaker 4A 12V EC 1, On Base Element
  • RS Stock No. 885-6261
  • Mfr. Part No. 3000763
1 Box of 6
$1,155.63(exc. GST)
In Stock
Siemens 100A Centred Tag Fuse, NH00, 500V ac
  • RS Stock No. 203-2012
  • Mfr. Part No. 3NA7830-7
Each (In a Pack of 3)
$19.667(exc. GST)
Temporarily out of stock
Better World
Schneider Electric, Compact MCCB 4P 100A, Breaking Capacity 16 kA, DIN Rail Mount
  • RS Stock No. 178-7919
  • Mfr. Part No. LV426707
Each
$2,675.38(exc. GST)
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