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

122 of 999+
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 1P 110A, Breaking Capacity 14 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-188
  • Mfr. Part No. 3VA5111-4ED11-1AA0
Each
$1,004.49(exc. GST)
Temporarily out of stock
Schneider Electric IKQ RCD, 25A, 4 Pole, 300mA, 415V ac
  • RS Stock No. 339-381
  • Mfr. Part No. SED25304
Each
$494.89(exc. GST)
In Stock
TE Connectivity 30A Fuse Holder for 10 x 38mm Fuse, 2P, 600V
  • RS Stock No. 299-088
  • Mfr. Part No. 1SNF100034R0000
Each
$42.16(exc. GST)
In Stock
Littelfuse 12A T Ceramic Cartridge Fuse, 5 x 20mm
  • RS Stock No. 769-0001
  • Mfr. Part No. 0215012.MXP
Each (In a Pack of 25)
$3.018(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 4P 100A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 268-651
  • Mfr. Part No. 3VA6110-6JP41-2AA0
Each
$5,023.07(exc. GST)
In Stock
ABB 220 → 240V ac Undervoltage Release Circuit Trip for use with XT2, XT3, XT4 Circuit Breakers
  • RS Stock No. 225-5869
  • Mfr. Part No. 1SDA066406R1 UVR-C XT2-XT4 W 220-240VAC
Each
$359.06(exc. GST)
In Stock
Better World
Siemens Sentron 5SY4 MCB, 1P, 4A Curve D, 230V AC, 72V DC, 10 kA Breaking Capacity
  • RS Stock No. 772-1240
  • Mfr. Part No. 5SY4104-8
Each
$127.36(exc. GST)
Temporarily out of stock
Better World
Siemens SENTRON Electronic Circuit Breaker 250A 3VA, 3 channels
  • RS Stock No. 156-723
  • Mfr. Part No. 3VA2325-5HM32-0AA0
Each
$4,975.20(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 2P 600A, Breaking Capacity 65 kA, Fixed Mount
  • RS Stock No. 257-686
  • Mfr. Part No. 3VA5560-6EC66-0AA0
Each
$8,498.89(exc. GST)
In Stock
Littelfuse 125mA F Melamine Cartridge Fuse, 10 x 38mm
  • RS Stock No. 738-3185
  • Mfr. Part No. 0KLK.125T
Each
$63.65(exc. GST)
In Stock
Better World
Schneider Electric, PowerLogic, 160A, Energy Sensor, 3VA, Wired
  • RS Stock No. 256-4050
  • Mfr. Part No. A9MEM1580
Each
$609.65(exc. GST)
Temporarily out of stock
Eaton 20A Cartridge Fuse, 22.2 x 58mm
  • RS Stock No. 261-447
  • Mfr. Part No. C22G20S
1 Pack of 10
$224.37(exc. GST)
Temporarily out of stock
Hager BFF RCCB, 63A, 2 Pole, 300mA, Type F
  • RS Stock No. 602-061
  • Mfr. Part No. BFF263
Each
$1,116.95(exc. GST)
Temporarily out of stock
Eaton IZMX/INX Electronic Circuit Breaker 1.6kA , 3 channels , Withdrawable
  • RS Stock No. 132-840
  • Mfr. Part No. 183598 IZMX40N3-P16W-1
Each
$34,126.71(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB 3P 80A, Breaking Capacity 55 kA
  • RS Stock No. 209-6860
  • Mfr. Part No. 3VA1180-5ED32-0AA0
Each
$977.92(exc. GST)
Temporarily out of stock
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 7A, Breaking Capacity 10 kA, Cable Mount, Panel Mount
  • RS Stock No. 148-726
  • Mfr. Part No. 3VA5107-1MU31-0AA0
Each
$1,020.03(exc. GST)
Temporarily out of stock
SENTRON Terminal for use with 3VA61/62 Series
  • RS Stock No. 263-757
  • Mfr. Part No. 3VA9241-0QE20
Each
$239.78(exc. GST)
In Stock
ABB High Performance S800S MCB, 1P, 100A Curve C, 400V AC, 250V DC, 50 kA Breaking Capacity
  • RS Stock No. 435-358
  • Mfr. Part No. 2CCG001227R0001
Each
$128.58(exc. GST)
Temporarily out of stock
Better World
Siemens, SENTRON MCCB Molded Case Circuit Breaker 3P 150A, Breaking Capacity 100 kA, Fixed Mount
  • RS Stock No. 270-015
  • Mfr. Part No. 3VA6115-7KP31-0AA0
Each
$5,987.34(exc. GST)
Temporarily out of stock
Better World
Siemens, 0AA0 MCCB 4P 630A, Breaking Capacity 55 kA, Fixed Mount
  • RS Stock No. 211-6071
  • Mfr. Part No. 3VA2463-5KP42-0AA0
Each
$7,789.82(exc. GST)
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