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

235 of 999+
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 800A, Breaking Capacity 70 kA, Fixed Mount
  • RS Stock No. 654-488
  • Mfr. Part No. C080H420FM
Each
$10,403.40(exc. GST)
Temporarily out of stock
Eaton xEnergy Main Distribution Board
  • RS Stock No. 259-244
  • Mfr. Part No. 284179 XPSS2008
Each
$565.09(exc. GST)
Temporarily out of stock
Eaton IZMX/INX Electronic Circuit Breaker 2kA , Fixed
  • RS Stock No. 132-925
  • Mfr. Part No. 183814 IZMX40B4-P20F-1
Each
$41,493.22(exc. GST)
Temporarily out of stock
Phoenix Contact Surge Protector, 40kA, DIN Rail Mount
  • RS Stock No. 207-2707
  • Mfr. Part No. 2905355
Each
$177.98(exc. GST)
In Stock
Bourns 0.2A Resettable Fuse, 60V
  • RS Stock No. 647-8459
  • Mfr. Part No. MF-R020
Each (In a Pack of 10)
$0.732(exc. GST)
In Stock
Mersen 250A NH Fuse, NH1, 690V ac
  • RS Stock No. 270-3107
  • Mfr. Part No. R227899
Each
$85.80(exc. GST)
Temporarily out of stock
Eaton 1.4A T Melamine Cartridge Fuse, 1.5 x 0.41in
  • RS Stock No. 261-649
  • Mfr. Part No. LP-CC-1-4/10
1 Pack of 10
$1,138.17(exc. GST)
Temporarily out of stock
Eaton 5A Ceramic Cartridge Fuse, 25 x 140mm
  • RS Stock No. 703-4072
  • Mfr. Part No. 5-5ABWNA5E
Each
$291.78(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 100A, Breaking Capacity 50 kA, Fixed Mount
  • RS Stock No. 655-153
  • Mfr. Part No. C11N44V100L
Each
$3,833.65(exc. GST)
Temporarily out of stock
Siemens 50A Tag Fuse, 137mm, 1kV, 106.6mm
  • RS Stock No. 608-802
  • Mfr. Part No. 3NE3217-0MK
1 Pack of 3
$424.30(exc. GST)
Temporarily out of stock
Siemens ALPHA Distribution Board
  • RS Stock No. 272-0312
  • Mfr. Part No. 8GK1072-2KK21
Each
$2,137.31(exc. GST)
Temporarily out of stock
Eaton 200A Tag Fuse, 2XL, 1.5kV, 205mm
  • RS Stock No. 282-6512
  • Mfr. Part No. PV-200A-2XL-15
Each
$1,040.23(exc. GST)
In Stock
Phoenix Contact TRABTECH Thermal Circuit Breaker - CB TM1 6A SFB P Single Pole, 6A Current Rating
  • RS Stock No. 768-0864
  • Mfr. Part No. 2800841
Each
$91.86(exc. GST)
Temporarily out of stock
Eaton 2A Tag Fuse, 13 x 47mm, 240000V
  • RS Stock No. 228-982
  • Mfr. Part No. STD2
1 Pack of 20
$317.64(exc. GST)
Temporarily out of stock
Schneider Electric MasterPacT Spare Parts for use with MasterPact NT/NW
  • RS Stock No. 432-958
  • Mfr. Part No. 33035
Each
$989.38(exc. GST)
In Stock
Bourns 0.2A Resettable Fuse, 9V
  • RS Stock No. 167-4471
  • Mfr. Part No. MF-PSMF020X-2
Each (On a Reel of 3000)
$0.681(exc. GST)
In Stock
Bourns Single, Three Phase Surge Protector, 50kA, 1kV, DIN Rail Mount
  • RS Stock No. 287-9629
  • Mfr. Part No. 1250A-2S-230
Each
$331.87(exc. GST)
In Stock
TE Connectivity Thermal Circuit Breaker - W51 Single Pole 250V ac Voltage Rating, 5A Current Rating
  • RS Stock No. 782-8079
  • Mfr. Part No. W51-A122B1-5
Each
$9.12(exc. GST)
Temporarily out of stock
Eaton NZM Electronic Circuit Breaker 200A NZM, 4 channels , Fixed
  • RS Stock No. 121-806
  • Mfr. Part No. 147394 NZMN2-4-A200-BT
Each
$3,896.65(exc. GST)
Temporarily out of stock
Hager Hager NRN Circuit Breaker, 2P, 25A Curve C, 415V AC, 25 kA Breaking Capacity
  • RS Stock No. 599-701
  • Mfr. Part No. NRN225
Each
$305.69(exc. GST)
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