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

1732 of 999+
In Stock
Littelfuse PC Board Non Resettable Fuse, Radial 62mA, 125V ac/dc
  • RS Stock No. 738-3093
  • Mfr. Part No. 0259.062T
Each
$10.74(exc. GST)
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 6.3kA 1SDA07, 4 / f channels
  • RS Stock No. 259-3972
  • Mfr. Part No. 1SDA072024R1
Each
$130,428.69(exc. GST)
Temporarily out of stock
Schneider Electric, PowerPact B Circuit breaker 3P 60A, Breaking Capacity 100 KA, Clip-On
  • RS Stock No. 119-187
  • Mfr. Part No. BJL36060LU
Each
$2,762.66(exc. GST)
In Stock
SUT 6.3x32 Time Lag 15A 250VAC 100VDC
  • RS Stock No. 577-303
  • Mfr. Part No. 8020.0604.H
Each
$1.35(exc. GST)
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 6.3kA 1SDA07, 3 channels
  • RS Stock No. 259-4461
  • Mfr. Part No. 1SDA072660R1
Each
$122,511.53(exc. GST)
Temporarily out of stock
Better World
Siemens, Sentron MCCB Molded Case Circuit Breaker 3P 40A, Breaking Capacity 2.5 kA
  • RS Stock No. 245-754
  • Mfr. Part No. 3VA6140-6KL31-2AA0
Each
$8,043.42(exc. GST)
In Stock
Littelfuse PC Board Non Resettable Fuse 62mA, 125V ac/dc
  • RS Stock No. 738-3062P
  • Mfr. Part No. 0251.062MRT1L
Each (Supplied on a Reel)
$4.796(exc. GST)
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 4kA 1SDA07, 3 channels
  • RS Stock No. 259-4404
  • Mfr. Part No. 1SDA072586R1
Each
$53,243.80(exc. GST)
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 4kA Ekip Touch LI, 3 channels
  • RS Stock No. 259-4402
  • Mfr. Part No. 1SDA072584R1
Each
$50,584.28(exc. GST)
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 3.2kA 1SDA07, 4 channels
  • RS Stock No. 259-3771
  • Mfr. Part No. 1SDA071778R1
Each
$39,883.20(exc. GST)
In Stock
Eaton 110 → 130V ac Undervoltage Release Circuit Trip for use with N(S)2(-4) Series, N(S)3(-4) Series, NZM2(-4)
  • RS Stock No. 537-5624
  • Mfr. Part No. 259589 NZM2/3-XUHIV110-130AC
Each
$450.49(exc. GST)
In Stock
SUT 6.3x32 Time Lag 20A 250VAC 100VDC
  • RS Stock No. 577-304
  • Mfr. Part No. 8020.0605.H
Each
$1.42(exc. GST)
In Stock
Fuse - Mini 58VDC 25A 3000 pc
  • RS Stock No. 552-331
  • Mfr. Part No. 0997025.WXN
1 Bag of 200
$476.88(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 630A, Breaking Capacity 30 kA, Fixed Mount
  • RS Stock No. 346-973
  • Mfr. Part No. C063H45AFM
Each
$24,373.88(exc. GST)
New product - Preorder today
SMF NANO FUSE CLIP SB RoHS 260C 2A
  • RS Stock No. 522-978
  • Mfr. Part No. 0157002.DRT
1 Bag of 100
$1,066.85(exc. GST)
Temporarily out of stock
Better World
Siemens, Sentron MCCB Molded Case Circuit Breaker 4P 100A, Breaking Capacity 3 kA
  • RS Stock No. 245-239
  • Mfr. Part No. 3VA6210-7HN41-2AA0
Each
$13,513.28(exc. GST)
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 3.2kA 1SDA07, 4 channels
  • RS Stock No. 259-3770
  • Mfr. Part No. 1SDA071777R1
Each
$40,552.24(exc. GST)
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 800A 1SDA07, 4 channels
  • RS Stock No. 259-4619
  • Mfr. Part No. 1SDA072888R1
Each
$22,487.67(exc. GST)
Currently unavailable
Fluke Cartridge Fuse
  • RS Stock No. 729-6734
  • Mfr. Part No. 871210
1 Pack of 25
$215.05(exc. GST)
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 4kA Ekip G Hi-Touch LSIG, 4 channels
  • RS Stock No. 259-3825
  • Mfr. Part No. 1SDA071840R1
Each
$64,006.32(exc. GST)
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