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

119 of 999+
In Stock
TE Connectivity Thermal Circuit Breaker - W28 Single Pole 32 V dc, 250V ac Voltage Rating Panel Mount, 10A Current
  • RS Stock No. 167-5677
  • Mfr. Part No. W28-XQ1A-10
Each
$8.62(exc. GST)
Temporarily out of stock
30A Cartridge Fuse, 13 x 29mm
  • RS Stock No. 262-940
  • Mfr. Part No. C3030
1 Pack of 10
$107.90(exc. GST)
Last RS stock
RS PRO 8A F Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 182-4028
Each (In a Pack of 5)
$9.95(exc. GST)
In Stock
Eaton, xEnergy MCCB 3P 160A, Breaking Capacity 50 kA, Fixed Mount
  • RS Stock No. 628-8032
  • Mfr. Part No. 259092 NZMN2-A160
1 Box of 1
$972.63(exc. GST)
Temporarily out of stock
SENTRON Terminal for use with 3VA52 Series
  • RS Stock No. 263-704
  • Mfr. Part No. 3VA9231-0QF10
Each
$187.40(exc. GST)
In Stock
FUSE 250V 5x20 Single PGT HBC 6.3A
  • RS Stock No. 552-248
  • Mfr. Part No. 021506.3MXESPP
1 Bag of 100
$154.53(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 90A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 269-645
  • Mfr. Part No. 3VA5290-6EC31-0AA0
Each
$2,287.33(exc. GST)
In Stock
Phoenix Contact 3 Phase Surge Protector, 40kA, 1800V (Volts), DIN Rail Mount
  • RS Stock No. 130-239
  • Mfr. Part No. 2910370
Each
$501.70(exc. GST)
In Stock
Schneider Electric Multi9 M9F MCB, 2P, 8A Curve D, 240V AC, 125V DC, 14 kA Breaking Capacity
  • RS Stock No. 288-1399
  • Mfr. Part No. M9F23208
Each
$458.81(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 3P 80A, Fixed Mount
  • RS Stock No. 260-9468
  • Mfr. Part No. C10H3TM080
Each
$1,996.85(exc. GST)
In Stock
Littelfuse 30A F Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 738-3150
  • Mfr. Part No. 0KLK030.T
Each
$35.60(exc. GST)
Temporarily out of stock
Schneider Electric, ComPacT MCCB 4P 1.25kA, Breaking Capacity 50 kA, Fixed Mount
  • RS Stock No. 654-620
  • Mfr. Part No. C125N420FM
Each
$13,212.73(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 600A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 257-684
  • Mfr. Part No. 3VA5560-6EC46-0AA0
Each
$10,225.56(exc. GST)
In Stock
Eaton 60A Ceramic Cartridge Fuse, 30 x 57mm
  • RS Stock No. 182-1450
  • Mfr. Part No. 60LR85
Each (In a Box of 20)
$24.115(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 4P 63A, Breaking Capacity 150 kA, Fixed Mount
  • RS Stock No. 270-3902
  • Mfr. Part No. 3VA2063-8JP42-0AA0
Each
$4,088.27(exc. GST)
In Stock
Siemens 250A Centred Tag Fuse, NH3, 690V
  • RS Stock No. 230-2940
  • Mfr. Part No. 3NA3344-6
Each (In a Pack of 3)
$292.357(exc. GST)
Temporarily out of stock
Eaton Rear Support for use with N2, NS2, NZM2, PN2
  • RS Stock No. 232-212
  • Mfr. Part No. 107261 NZM2-XRAVR
Each
$595.74(exc. GST)
Limited stock
SIBA 20A Ceramic Cartridge Fuse, 10 x 38mm
  • RS Stock No. 768-6112
  • Mfr. Part No. 5022526.20
Each
$32.01(exc. GST)
Temporarily out of stock
Siemens 5SV33 RCCB, 63A, 2 Pole, 30mA, Type A, 125V
  • RS Stock No. 328-442
  • Mfr. Part No. 5SV3316-6KK13
Each
$779.23(exc. GST)
Temporarily out of stock
Eaton IZMX40B3-P20F-1 Electronic Circuit Breaker 2kA , Fixed
  • RS Stock No. 132-815
  • Mfr. Part No. 183578 IZMX40B3-P20F-1
Each
$34,940.08(exc. GST)
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