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

304 of 999+
Temporarily out of stock
Better World
Schneider Electric Acti 9 IC60L MCB, 3P, 40A, Type Z, 400V AC, 180V DC, 20 kA, 15 kA Breaking Capacity
  • RS Stock No. 212-0126
  • Mfr. Part No. A9F92340
Each
$806.76(exc. GST)
Temporarily out of stock
Schneider Electric Acti9 3 Phase Distribution Board, 20 Way, 250 A
  • RS Stock No. 339-836
  • Mfr. Part No. SEB48S12250
Each
$10,313.48(exc. GST)
In Stock
Littelfuse 16A Panel Mount Fuse Holder for 5 x 20, 6.3 x 32mm Fuse, 1P, 250V ac
  • RS Stock No. 787-4319P
  • Mfr. Part No. 80000000105
Each (Supplied in a Bag)
$6.118(exc. GST)
Being discontinued
RS PRO PC Board Non Resettable Fuse, Axial 3A, 250V ac
  • RS Stock No. 764-9558P
Each (Supplied in a Bag)
$1.085(exc. GST)
In Stock
Schurter 15A T Ceramic Cartridge Fuse, 6.3 x 32mm
  • RS Stock No. 703-2669P
  • Mfr. Part No. 8020.0604.G
Each (Supplied in a Box)
$1.957(exc. GST)
Temporarily out of stock
Siemens SENTRON 5SY7 MCB, 1P, 300mA Curve D, 400V AC, 50 kA Breaking Capacity
  • RS Stock No. 610-644
  • Mfr. Part No. 5SY7114-8
Each
$110.97(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 1.25kA, Breaking Capacity 50 kA, Fixed Mount
  • RS Stock No. 654-142
  • Mfr. Part No. C125N350FM
Each
$12,739.56(exc. GST)
In Stock
Siemens 16A Centred Tag Fuse, NH000, 400V
  • RS Stock No. 230-2959
  • Mfr. Part No. 3NA6805-4
Each (In a Pack of 3)
$26.78(exc. GST)
In Stock
Eaton 16A Fast Acting Cartridge Fuse
  • RS Stock No. 228-714
  • Mfr. Part No. 16D16Q
1 Pack of 10
$62.56(exc. GST)
Temporarily out of stock
Socomec 1kA Tag Fuse, NH3, 690V, 150mm
  • RS Stock No. 252-5308
  • Mfr. Part No. 170M6814
Each
$421.77(exc. GST)
Temporarily out of stock
Phoenix Contact Trabtech Thermal Circuit Breaker - CB TM2 2 Pole 80V dc Voltage Rating, 4A Current Rating
  • RS Stock No. 201-5737
  • Mfr. Part No. 2800894
Each
$192.27(exc. GST)
Temporarily out of stock
Siemens 400A Tag Fuse, 161mm, 1kV, 129.7mm
  • RS Stock No. 608-827
  • Mfr. Part No. 3NE3432-0C
1 Pack of 3
$1,301.28(exc. GST)
Temporarily out of stock
Phoenix Contact EC-E Electronic Circuit Breaker 3A 24V EC-E1, 1 channels , DIN Rail
  • RS Stock No. 131-318
  • Mfr. Part No. 0903025
Each (In a Pack of 6)
$182.857(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 20A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 271-9828
  • Mfr. Part No. 3VA1120-5ED36-0AA0
Each
$974.28(exc. GST)
Temporarily out of stock
ABB AC Switch Disconnectors Accessories Detachable Neutral Clamp for use with Low-Voltage Switch Technology
  • RS Stock No. 259-9706
  • Mfr. Part No. 1SCA104162R1001
Each
$555.17(exc. GST)
Temporarily out of stock
Siemens 110 → 480V (Volts) Shunt Release Circuit Trip for use with Miniature Circuit Breaker
  • RS Stock No. 328-520
  • Mfr. Part No. 5ST3030-0HG
Each
$156.90(exc. GST)
In Stock
Mersen 50A NH Fuse, NH000, 400V ac
  • RS Stock No. 270-3067
  • Mfr. Part No. K223684
Each (In a Box of 3)
$21.023(exc. GST)
Temporarily out of stock
2A Cartridge Fuse, 13 x 29mm
  • RS Stock No. 262-577
  • Mfr. Part No. SMD2
1 Pack of 20
$499.15(exc. GST)
Last RS stock
Wickmann 4A Resettable Fuse, 30 V ac, 30V dc
  • RS Stock No. 174-0845
  • Mfr. Part No. RF2561-000
Each (In a Pack of 10)
$1.129(exc. GST)
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 400A 3VA2, 4 channels
  • RS Stock No. 156-616
  • Mfr. Part No. 3VA2440-8HK42-0AA0
Each
$10,355.62(exc. GST)
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