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

89 of 999+
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 100A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 268-519
  • Mfr. Part No. 3VA6110-8KQ41-2AA0
Each
$7,220.66(exc. GST)
Better World
Schneider Electric RCBO, 25A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Acti 9 Range
  • RS Stock No. 790-9327
  • Mfr. Part No. A9D11825
Each
$98.86(exc. GST)
Eaton 20A DII Diazed Fuse, gG, 500V ac
  • RS Stock No. 181-8550
  • Mfr. Part No. 20D27
1 Box of 25
$715.07(exc. GST)
Eaton 30A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 852-7073
  • Mfr. Part No. MDA-30-R
Each
$14.45(exc. GST)
Clipsal Electrical RCBO, 10A Current Rating, 3P+N Poles, 100mA Trip Sensitivity, Type A, Acti9 Range
  • RS Stock No. 281-5923
  • Mfr. Part No. A9DC2910
Each
$679.25(exc. GST)
Schneider Electric Acti 9 Safety Transformer for use with Acti9
  • RS Stock No. 247-1921
  • Mfr. Part No. A9A15222
Each
$283.39(exc. GST)
RS PRO 6.3A Inline Fuse Holder for 5 x 20mm Fuse, 1P, 250V ac
  • RS Stock No. 277-3919
Each (In a Bag of 1000)
$0.995(exc. GST)
Mersen 200mA Time Lag Glass Cartridge Fuse, 5 x 20mm
  • RS Stock No. 630-861
  • Mfr. Part No. D090508Q
1 Box of 10
$12.90(exc. GST)
Better World
Siemens, SENTRON MCCB 4P 25A, Breaking Capacity 55 kA
  • RS Stock No. 210-1648
  • Mfr. Part No. 3VA1125-5GF46-0AA0
Each
$1,324.57(exc. GST)
Siemens SENTRON 3 Phase Busbar, 17.8mm Pitch
  • RS Stock No. 202-7258
  • Mfr. Part No. 5ST3615
Each (In a Pack of 10)
$21.454(exc. GST)
Siemens 3 Phase Surge Protector, 25kA, DIN Rail Mount
  • RS Stock No. 211-0188
  • Mfr. Part No. 5SD7444-1
Each
$3,360.65(exc. GST)
Mersen 12.5A Slow-Blow Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 247-2708
  • Mfr. Part No. C1014578
1 Box of 10
$256.15(exc. GST)
Littelfuse 160A Grey, White Fuse Strips Car Fuse, 48V dc
  • RS Stock No. 226-0917
  • Mfr. Part No. 157.5701.6161
Each
$19.13(exc. GST)
Eaton xComfort KLV Distribution Board Enclosure
  • RS Stock No. 125-091
  • Mfr. Part No. 178823 KLV-12HWS-SF
Each
$302.86(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)
Sato Parts 10A Panel Mount Fuse Holder for 6.4 x 30mm Fuse, 250V ac
  • RS Stock No. 627-2093
  • Mfr. Part No. F-4000-A
Each (In a Pack of 5)
$8.426(exc. GST)
Better World
Schneider Electric, ComPacT NSX MCCB 4P 160A, Fixed Mount
  • RS Stock No. 254-6335
  • Mfr. Part No. C12N44V160L
Each
$6,603.96(exc. GST)
Eaton 63A British Standard Fuse, A3, 550V ac, 73.5mm
  • RS Stock No. 156-8620
  • Mfr. Part No. BAO63M80
Each
$30.94(exc. GST)
Limitor Thermal Fuse +90°C 2.5 A, 250V ac
  • RS Stock No. 204-7433
  • Mfr. Part No. Q82 A 90 05 100
Each
$14.85(exc. GST)
Schneider Electric, ComPacT New Generation MCCB 3P 15A, Breaking Capacity 100 kA, Screw Mount
  • RS Stock No. 207-253
  • Mfr. Part No. BJL36015LU
Each
$3,229.89(exc. GST)
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