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

104 of 999+
Temporarily out of stock
Siemens SENTRON 5SY4 MCB, 2P, 80A Curve C, 230V AC, 60V DC, 15 kA Breaking Capacity
  • RS Stock No. 610-588
  • Mfr. Part No. 5SY4580-7
Each
$364.54(exc. GST)
Temporarily out of stock
Eaton DILE RC RC Suppressor Circuit for use with Circuit Breaker
  • RS Stock No. 254-227
  • Mfr. Part No. 230268 RCDILE250-C
1 Pack of 10
$280.65(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT New Generation MCCB 3P 20A, Breaking Capacity 100 kA, Screw Mount
  • RS Stock No. 244-920
  • Mfr. Part No. BJL36020LU
Each
$3,229.89(exc. GST)
Temporarily out of stock
Siemens 50A Centred Tag Fuse, NH00, 690V ac
  • RS Stock No. 203-2127
  • Mfr. Part No. 3NA3820-6
Each (In a Pack of 3)
$104.11(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 100A, Fixed Mount
  • RS Stock No. 260-7653
  • Mfr. Part No. C11N3TM100B
Each
$1,596.50(exc. GST)
In Stock
Better World
ABB System Pro M Compact S200 MCB, 3P, 2A Curve K, 440V AC, 20 kA Breaking Capacity
  • RS Stock No. 514-0181
  • Mfr. Part No. 2CDS253001R0277 S203-K2
Each
$291.08(exc. GST)
In Stock
Better World
Schneider Electric Linergy Busbar, 400V
  • RS Stock No. 211-2274
  • Mfr. Part No. AK5JB145
Each
$681.53(exc. GST)
In Stock
Siemens 6A DII Diazed Fuse, E27 Thread Size, gG, 500V ac
  • RS Stock No. 396-174
  • Mfr. Part No. 5SB231
1 Pack of 5
$15.31(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 150A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 269-946
  • Mfr. Part No. 3VA6115-8HL31-0AA0
Each
$4,081.24(exc. GST)
In Stock
Schneider Electric Acti9 Active Vigi iDT40 MCB Mini Circuit Breaker, 2P, 40A, Type A-SI, 230V AC
  • RS Stock No. 655-451
  • Mfr. Part No. A9V6E240
Each
$1,649.43(exc. GST)
In Stock
Littelfuse PC Board Non Resettable Fuse, Axial 5A, 125V ac/dc
  • RS Stock No. 541-3192
  • Mfr. Part No. 473005.YRT1L
Each (In a Pack of 10)
$4.681(exc. GST)
In Stock
TE Connectivity Thermal Circuit Breaker - W58 Single Pole 250V ac Voltage Rating, 30A Current Rating
  • RS Stock No. 782-8016
  • Mfr. Part No. W54-XB1A4A10-30
Each
$9.67(exc. GST)
In Stock
Schneider Electric Acti9 1 Phase Distribution Board, 6 Way, 125 A
  • RS Stock No. 244-967
  • Mfr. Part No. SE125A6
Each
$288.82(exc. GST)
Limited stock
Limitor Thermal Fuse +60°C 2.5 A, 250V ac
  • RS Stock No. 204-7398
  • Mfr. Part No. Q82 A 60 05 100
Each
$12.78(exc. GST)
In Stock
Phoenix Contact Electronic Device Circuit Breaker Electronic Circuit breaker 2A 24V PTCB, 1 channels , DIN Rail Mount
  • RS Stock No. 207-2803
  • Mfr. Part No. 2909903
Each
$73.76(exc. GST)
In Stock
Phoenix Contact 3 Phase Surge Protector, DIN Rail Mount
  • RS Stock No. 207-2802
  • Mfr. Part No. 2909637
Each
$484.79(exc. GST)
Temporarily out of stock
Better World
ABB Emax2 Electronic Circuit Breaker 1kA 1SDA07, 3 channels
  • RS Stock No. 259-9925
  • Mfr. Part No. 1SDA070784R1
Each
$9,183.13(exc. GST)
In Stock
Littelfuse PC Board Non Resettable Fuse, Radial 4A, 250V ac
  • RS Stock No. 226-6577
  • Mfr. Part No. 37014000000
Each (In a Pack of 10)
$1.119(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT NSX MCCB 3P 160A, Breaking Capacity 25 kA, Panel Mount
  • RS Stock No. 654-808
  • Mfr. Part No. IL0633P25
Each
$788.94(exc. GST)
In Stock
RS PRO PC Board Non Resettable Fuse, Radial 500mA, 250V
  • RS Stock No. 767-5184
Each (In a Pack of 10)
$0.809(exc. GST)
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