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

126 of 999+
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 600A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 249-887
  • Mfr. Part No. 3VA6460-6JT31-0AA0
Each
$15,338.41(exc. GST)
Temporarily out of stock
Better World
Schneider Electric, PowerPact MCCB 3P 15A, Breaking Capacity 14 kA, Fixed Mount
  • RS Stock No. 219-8304
  • Mfr. Part No. BDF36015
Each
$1,062.66(exc. GST)
Temporarily out of stock
Siemens 80A Tag Fuse, NH2, 690 / 440V ac/dc
  • RS Stock No. 144-081
  • Mfr. Part No. 3NA6224-6
1 Pack of 3
$383.94(exc. GST)
Temporarily out of stock
SENTRON Terminal Cover for use with 3VA52, 3VA61/62 Series
  • RS Stock No. 263-928
  • Mfr. Part No. 3VA9271-0WF31
Each
$345.98(exc. GST)
In Stock
Siemens SIRIUS Undervoltage Release for use with Motor Circuit Breaker
  • RS Stock No. 157-845
  • Mfr. Part No. 3RV1912-1CP0
Each
$294.43(exc. GST)
In Stock
ETA Thermal Circuit Breaker - 2-5700 Single Pole 250V Voltage Rating Panel Mount, 2.5A Current Rating
  • RS Stock No. 405-9129
  • Mfr. Part No. 2-5700-IG1-P10-DD-000040-2.5A
Each
$96.28(exc. GST)
Temporarily out of stock
Hager BFF RCCB, 25A, 3P+N Pole, 300mA, Type F
  • RS Stock No. 602-065
  • Mfr. Part No. BFF425F
Each
$838.35(exc. GST)
Temporarily out of stock
Siemens SENTRON 5SY8 MCB, 4P, 2A Curve C, 400V AC, 60V DC, 70 kA Breaking Capacity
  • RS Stock No. 610-656
  • Mfr. Part No. 5SY8402-7
Each
$622.95(exc. GST)
Temporarily out of stock
Schneider Electric, Compact MCCB 3P 1.6kA, Breaking Capacity 22 kA, Fixed Mount
  • RS Stock No. 354-403
  • Mfr. Part No. C160H3FM
Each
$17,350.34(exc. GST)
In Stock
Murrelektronik Limited Earthing Strap Tinned Copper
  • RS Stock No. 285-5830
  • Mfr. Part No. 4000-71001-1630006
Each
$33.13(exc. GST)
Temporarily out of stock
Hager BDH RCCB, 63A, 4 Pole, 30mA, Type A
  • RS Stock No. 602-180
  • Mfr. Part No. BDH863
Each
$1,431.01(exc. GST)
Temporarily out of stock
FUSE 440V TL 6.3X32MM .630A
  • RS Stock No. 552-448
  • Mfr. Part No. 35606300029
1 Pack of 100
$493.48(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 40A, Breaking Capacity 25 kA
  • RS Stock No. 209-6813
  • Mfr. Part No. 3VA1140-3EF32-0AA0
Each
$820.82(exc. GST)
In Stock
Littelfuse SMD Non Resettable Fuse 10A, 125V
  • RS Stock No. 895-1593P
  • Mfr. Part No. 0448010.MR
Each (Supplied on a Reel)
$3.601(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 100A, Breaking Capacity 35 kA, Fixed Mount
  • RS Stock No. 269-881
  • Mfr. Part No. 3VA6110-5JT31-2AA0
Each
$5,180.08(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 7A, Breaking Capacity 10 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-725
  • Mfr. Part No. 3VA5107-1MH31-0AA0
Each
$1,020.03(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 100A, Breaking Capacity 85 kA, Fixed Mount
  • RS Stock No. 270-3566
  • Mfr. Part No. 3VA2010-6KQ42-0AA0
Each
$5,559.21(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 40A, Fixed Mount
  • RS Stock No. 260-7662
  • Mfr. Part No. C11N4TM040L
Each
$1,894.07(exc. GST)
Temporarily out of stock
Schneider Electric ComPacT New Generation Trip Unit for use with ComPacT NSX100/160
  • RS Stock No. 260-9355
  • Mfr. Part No. C103MG063
Each
$410.17(exc. GST)
Temporarily out of stock
Schneider Electric MasterPact Connection Unit for use with MTZ1 06-16
  • RS Stock No. 212-002
  • Mfr. Part No. LV833736
Each
$915.41(exc. GST)
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