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

278 of 999+
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 1kA 1SDA07, 3 channels
  • RS Stock No. 259-3073
  • Mfr. Part No. 1SDA070927R1
Each
$19,439.76(exc. GST)
Temporarily out of stock
Lovato Single Phase Surge Protector, 100kA, DIN Rail Mount
  • RS Stock No. 248-5665
  • Mfr. Part No. SA1B3PA320R
Each
$1,742.61(exc. GST)
Temporarily out of stock
Eaton Phase Busbar 1 Phase Busbar, 277V
  • RS Stock No. 230-996
  • Mfr. Part No. 121989 BB-UL-25/1P-1M/57
Each
$76.27(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 150A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 269-954
  • Mfr. Part No. 3VA6115-8JT41-2AA0
Each
$8,947.38(exc. GST)
In Stock
Sensata Airpax Airpax Thermal Circuit Breaker - 229 3 Pole 480V ac Voltage Rating Panel Mount, 100A Current Rating
  • RS Stock No. 275-0074
  • Mfr. Part No. 229-3-1-61-5-9-100-V
1 Box of 5
$3,700.95(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 160A, Fixed Mount
  • RS Stock No. 260-7690
  • Mfr. Part No. C12F3TM160B
Each
$2,230.36(exc. GST)
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 1.6kA Ekip G Hi-Touch LSIG, 3 channels
  • RS Stock No. 259-4227
  • Mfr. Part No. 1SDA072350R1
Each
$22,710.74(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 630A, Fixed Mount
  • RS Stock No. 260-8256
  • Mfr. Part No. C63V46E630
Each
$21,030.85(exc. GST)
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 63A 3VA2, 4 channels
  • RS Stock No. 157-136
  • Mfr. Part No. 3VA2163-5HM42-0AA0
Each
$2,973.92(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 40A, Fixed Mount
  • RS Stock No. 260-7504
  • Mfr. Part No. C10W42D040
Each
$4,767.62(exc. GST)
Temporarily out of stock
Better World
Siemens SIRIUS Electronic Circuit Breaker 25A 3RV2, 3 channels , DIN Rail Mount
  • RS Stock No. 160-757
  • Mfr. Part No. 3RV2421-4DA20
Each
$635.61(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 100A, Fixed Mount
  • RS Stock No. 260-7520
  • Mfr. Part No. C11B34V100L
Each
$3,845.20(exc. GST)
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 6.3kA 1SDA07, 4 / f channels
  • RS Stock No. 259-3977
  • Mfr. Part No. 1SDA072029R1
Each
$140,538.86(exc. GST)
Temporarily out of stock
Eaton NZM Electronic Circuit Breaker 100A NZM, 4 channels , Fixed
  • RS Stock No. 120-168
  • Mfr. Part No. 153396 NZMH2-4-AF100-BT-NA
Each
$3,610.49(exc. GST)
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 800A Ekip Dip LSI, 3 channels
  • RS Stock No. 259-4140
  • Mfr. Part No. 1SDA072253R1
Each
$14,161.73(exc. GST)
In Stock
Mersen 160mA Time Lag Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 630-813
  • Mfr. Part No. H090535Q
1 Box of 10
$15.04(exc. GST)
Temporarily out of stock
Siemens SENTRON 5SY7 MCB, 4P, 25A Curve D, 400V AC, 60V DC, 25 kA Breaking Capacity
  • RS Stock No. 610-440
  • Mfr. Part No. 5SY7425-8
Each
$634.49(exc. GST)
Temporarily out of stock
ABB Emax2 Electronic Circuit Breaker 2.5kA 1SDA07, 3 channels
  • RS Stock No. 259-4318
  • Mfr. Part No. 1SDA072472R1
Each
$32,858.08(exc. GST)
Temporarily out of stock
Eaton xEnergy Basic Distribution Board Enclosure
  • RS Stock No. 230-234
  • Mfr. Part No. 116664 BPM-O-800/7-P
Each
$2,041.39(exc. GST)
In Stock
Wickmann PC Board Non Resettable Fuse, Radial 2.5A, 250V ac
  • RS Stock No. 226-0939P
  • Mfr. Part No. 3701250000
Each (Supplied as a Tape)
$2.329(exc. GST)
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