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

34912 Products showing for Fuses & Circuit Breakers

70 of 999+
Better World
ABB System Pro M Compact S200 MCB, 3P, 32A Curve K, 440V AC, 20 kA Breaking Capacity
  • RS Stock No. 514-0248
  • Mfr. Part No. 2CDS253001R0537 S203-K32
Each
$246.65(exc. GST)
Schneider Electric Vertical Busbar, Canalis Series
  • RS Stock No. 346-717
  • Mfr. Part No. KSA250ED33012
Each
$3,194.97(exc. GST)
Deltron Earthing Strap
  • RS Stock No. 181-1267
  • Mfr. Part No. 4ELM6
Each
$2.83(exc. GST)
Better World
Schneider Electric Acti 9 A9N1 MCB, 3P, 125A Curve D
  • RS Stock No. 219-8302
  • Mfr. Part No. A9N18514
Each
$1,157.28(exc. GST)
Schneider Electric, ComPacT Circuit Breaker Accessory
  • RS Stock No. 288-1496
  • Mfr. Part No. LV429449
Each
$355.55(exc. GST)
Schneider Electric RCBO, 25A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type B, Acti9 Range
  • RS Stock No. 654-687
  • Mfr. Part No. A9DH3625
Each
$593.63(exc. GST)
Clipsal Electrical MX9RC RCCB, 40A, 2 Pole, 30mA, Type A, 240V ac
  • RS Stock No. 282-2999
  • Mfr. Part No. MX9RC240
Each
$73.15(exc. GST)
Mersen 25A NH Fuse, NH000, 500V ac
  • RS Stock No. 375-9547
  • Mfr. Part No. E201185
Each (In a Pack of 3)
$20.927(exc. GST)
Siemens SENTRON Terminal for use with Circuit Breaker 3WL10 / 3VA27
  • RS Stock No. 266-568
  • Mfr. Part No. 3VW9011-0AL74
Each
$959.78(exc. GST)
Eaton IKA Standard Distribution Board Distribution Board
  • RS Stock No. 125-765
  • Mfr. Part No. 174209 IKA-1/18-OT
Each
$191.72(exc. GST)
Siemens SENTRON Current Transformer for use with Circuit Breaker 3WL10 / 3VA27
  • RS Stock No. 265-571
  • Mfr. Part No. 3VW9011-0AA30
Each
$784.84(exc. GST)
Eaton 1 Phase Industrial Surge Protection, 15kA, 277V ac, Flange Mount Mount
  • RS Stock No. 236-5201
  • Mfr. Part No. LS15K-KP30-277V-P
Each (In a Box of 5)
$81.818(exc. GST)
Schneider Electric Surge Arrester, 8kA, 1.1kV, Plug In Mount
  • RS Stock No. 357-452
  • Mfr. Part No. A9L16312
Each
$310.16(exc. GST)
Schneider Electric RCBO, 45A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type C, Acti9 Range
  • RS Stock No. 339-790
  • Mfr. Part No. SEE145C03
Each
$340.00(exc. GST)
Schneider Electric 32A Fuse Holder for 70 x 61mm Fuse, 3P+N, 690V
  • RS Stock No. 654-627
  • Mfr. Part No. DF103NV
Each
$103.23(exc. GST)
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 100A, Breaking Capacity 5 kA, Cable Mount, Panel Mount
  • RS Stock No. 147-271
  • Mfr. Part No. 3VA5110-4ED31-0AA0
Each
$1,327.04(exc. GST)
Schneider Electric Resi9 R9E MCB, 1P, 16A, 230V AC
  • RS Stock No. 357-153
  • Mfr. Part No. R9ETC616
Each
$650.65(exc. GST)
Littelfuse PC Board Non Resettable Fuse, Axial 4A, 125V ac
  • RS Stock No. 895-1612
  • Mfr. Part No. 0473004.MRT1L
Each (In a Pack of 10)
$2.633(exc. GST)
Schneider Electric, PowerPact MCCB 3P 250A, Breaking Capacity 25 kA, DIN Rail Mount
  • RS Stock No. 341-444
  • Mfr. Part No. NJJF36250U31XTW
Each
$9,864.33(exc. GST)
Siemens SENTRON 5SY Circuit Breaker, 1P, 500mA Curve C, 440V AC, 70 kA Breaking Capacity
  • RS Stock No. 664-368
  • Mfr. Part No. 5SY8105-7
Each
$105.77(exc. GST)
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