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

34963 Products showing for Fuses & Circuit Breakers

120 of 999+
Temporarily out of stock
Schneider Electric, ComPacT New Generation MCCB 1P 30A, Breaking Capacity 65 kA, Screw Mount
  • RS Stock No. 245-164
  • Mfr. Part No. BGL16030
Each
$1,352.04(exc. GST)
In Stock
Better World
Schneider Electric RCBO, 32A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type C, Acti 9 Range
  • RS Stock No. 790-9349
  • Mfr. Part No. A9D11832
Each
$95.49(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 100A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 268-444
  • Mfr. Part No. 3VA6110-8JP31-0AA0
Each
$4,619.43(exc. GST)
Temporarily out of stock
Eaton IZMX/INX Electronic Circuit Breaker 1.6kA IZMX/INX, 4 channels , Fixed
  • RS Stock No. 127-529
  • Mfr. Part No. 183461 IZMX16B4-P16W-1
Each
$30,256.30(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 100A, Breaking Capacity 25 kA, Fixed Mount
  • RS Stock No. 874-4155
  • Mfr. Part No. 3VA1110-3EF36-0AA0
Each
$1,090.78(exc. GST)
Temporarily out of stock
Schneider Electric Straight Busbar Trunking, 3m, 40A, Canalis Series
  • RS Stock No. 275-8809
  • Mfr. Part No. KBA40ED4303W
Each
$343.67(exc. GST)
Temporarily out of stock
ABB 40A Tag Fuse, 150 x 40 x 72mm, 500V
  • RS Stock No. 251-3470
  • Mfr. Part No. 1SCA022627R4900
1 Box of 3
$144.67(exc. GST)
In Stock
Siemens Push Button Circuit Trip for use with Circuit Trips
  • RS Stock No. 203-2375
  • Mfr. Part No. 5TE4800
Each
$111.95(exc. GST)
Temporarily out of stock
Hager Hager NRN Circuit Breaker, 4P, 10A Curve C, 415V AC, 25 kA Breaking Capacity
  • RS Stock No. 599-710
  • Mfr. Part No. NRN410
Each
$591.14(exc. GST)
In Stock
Better World
Schneider Electric 250V (Volts) Push Button
  • RS Stock No. 219-8269
  • Mfr. Part No. A9E18032
Each
$40.43(exc. GST)
In Stock
Schneider Electric Multi9 M9F MCB Mini Circuit Breaker, 1P, 6A Curve D, 240V AC, 10 kA Breaking Capacity
  • RS Stock No. 654-531
  • Mfr. Part No. M9F12106
Each
$100.08(exc. GST)
In Stock
Littelfuse PC Board Non Resettable Fuse, Axial 2A, 125V ac/dc
  • RS Stock No. 541-3287
  • Mfr. Part No. 251002.NRT1L
Each (In a Pack of 10)
$2.352(exc. GST)
Temporarily out of stock
nVent ERICO Neutral Double Busbar Busbar
  • RS Stock No. 646-810
  • Mfr. Part No. 568717
Each
$11.14(exc. GST)
Currently unavailable
TRF250-145U
  • RS Stock No. 552-424
  • Mfr. Part No. RF0027-000
1 Bag of 50
$49.37(exc. GST)
Temporarily out of stock
Siemens SENTRON Trip Alarm Switch for use with Circuit Breaker 3WL10 / 3VA27
  • RS Stock No. 266-563
  • Mfr. Part No. 3VW9011-0AH14
Each
$166.42(exc. GST)
Last RS stock
Wickmann 0.14A Resettable Fuse, 60V dc
  • RS Stock No. 174-0862
  • Mfr. Part No. RF1334-000
Each (In a Pack of 20)
$0.664(exc. GST)
Temporarily out of stock
Wickmann 0.35A Resettable Fuse, 6V dc
  • RS Stock No. 174-0725
  • Mfr. Part No. 1206L035YR
Each (In a Pack of 20)
$0.507(exc. GST)
Temporarily out of stock
Siemens 224A Tag Fuse, NH2, 400V ac
  • RS Stock No. 144-089
  • Mfr. Part No. 3NA6242-4
1 Pack of 3
$139.36(exc. GST)
Temporarily out of stock
ABB EV1124 Busbar
  • RS Stock No. 202-314
  • Mfr. Part No. 1STQ001019A0000
Each
$989.84(exc. GST)
Temporarily out of stock
Eaton 250mA Slow-Blow Ceramic Cartridge Fuse, 14 x 51mm
  • RS Stock No. 229-195
  • Mfr. Part No. C14M0.25
1 Pack of 10
$51.94(exc. GST)
1
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